Crop Production And Management Online Test 8th Science Lesson 21 Questions in English
Crop Production And Management 8th Science Lesson 21 Questions in English
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Crop Production And Management 8th Science Lesson 21 Questions in English
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Question 1 of 93
1. Question
- Assertion(A): Humans and animals are directly or indirectly dependent on plants
Reason(R): Animals and humans cannot make their own food
Correct
Explanation
Green plants make their own food using a process called photosynthesis. Animals and humans cannot make their own food. Thus, humans and animals are directly or indirectly dependent on plants
Incorrect
Explanation
Green plants make their own food using a process called photosynthesis. Animals and humans cannot make their own food. Thus, humans and animals are directly or indirectly dependent on plants
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Question 2 of 93
2. Question
- Which of the following statement is correct?
- Energy from the food is used by the organisms for carrying out their various body functions.
- Plants and animals are the main source of food for all the organisms
- In order to provide food for a larger population production, proper planning, management and distribution is needed.
Correct
Explanation
Energy from the food is used by the organisms for carrying out their various body functions. Plants and animals are the main source of food for all the organisms. In order to provide food for a larger population production, proper planning, management and distribution is needed. Farmers are faced with the challenge of producing sufficient crops to meet the growing demand while maintaining the quality and quantity of resources for future generations.
Incorrect
Explanation
Energy from the food is used by the organisms for carrying out their various body functions. Plants and animals are the main source of food for all the organisms. In order to provide food for a larger population production, proper planning, management and distribution is needed. Farmers are faced with the challenge of producing sufficient crops to meet the growing demand while maintaining the quality and quantity of resources for future generations.
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Question 3 of 93
3. Question
- Which of the following statement is incorrect?
- Agriculture has always been the backbone of our country’s economy
- Ever since the Green Revolution, we have been cultivating different types of crops to cater the increasing demand.
Correct
Explanation
Agriculture has always been the backbone of our country’s economy. Ever since the Green Revolution, we have been cultivating different types of crops to cater the increasing demand. In our country the following three categories of crops are grown.
Incorrect
Explanation
Agriculture has always been the backbone of our country’s economy. Ever since the Green Revolution, we have been cultivating different types of crops to cater the increasing demand. In our country the following three categories of crops are grown.
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Question 4 of 93
4. Question
- Which of the following is not a Kharif crop?
Correct
Explanation
Kharif Crops which are sown in the rainy season (i.e., from June to September) are called kharif crops. Paddy, maize, soya bean, groundnut, cotton etc., are kharif crops.
Incorrect
Explanation
Kharif Crops which are sown in the rainy season (i.e., from June to September) are called kharif crops. Paddy, maize, soya bean, groundnut, cotton etc., are kharif crops.
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Question 5 of 93
5. Question
- During which time Rabi crops are grown?
Correct
Explanation
Rabi Crops grown in winter season (i.e., from October to March) are called rabi crops. Examples of rabi crops are wheat, gram, pea, mustard, linseed.
Incorrect
Explanation
Rabi Crops grown in winter season (i.e., from October to March) are called rabi crops. Examples of rabi crops are wheat, gram, pea, mustard, linseed.
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Question 6 of 93
6. Question
- Which of the following is not a Zaid crop?
Correct
Explanation
Zaid Crops (Summer Crops) which are grown in summer season are called Zaid crops. Muskmelon, watermelon and cucumber are examples for Zaid crops.
Incorrect
Explanation
Zaid Crops (Summer Crops) which are grown in summer season are called Zaid crops. Muskmelon, watermelon and cucumber are examples for Zaid crops.
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Question 7 of 93
7. Question
- Which of the following are food crops?
- Paddy
- Maize
- Sorghum
Correct
Explanation
According to utility, crops are classified as below:
Food crops – Paddy and maize are cultivated for human consumption.
Incorrect
Explanation
According to utility, crops are classified as below:
Food crops – Paddy and maize are cultivated for human consumption.
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Question 8 of 93
8. Question
Match the following
Fodder crops 1. Croton
Fabre crops 2. Cotton
Oil crops 3. Sesame
Ornamental crops 4. Millets
Correct
Explanation
- Fodder crops – These are useful for livestock consumption. E.g. Sorghum, millets
- Fabre crops – These crops are used for cordage and textile. E.g. Cotton, hemp
- Oil crops – Oil crops are useful in a large scale for consumption or industrial uses. E.g. Ground nut, sesame.
- Ornamental crops – These are utilized for landscape gardening. E.g- Croton, Euphorbia.
Incorrect
Explanation
- Fodder crops – These are useful for livestock consumption. E.g. Sorghum, millets
- Fabre crops – These crops are used for cordage and textile. E.g. Cotton, hemp
- Oil crops – Oil crops are useful in a large scale for consumption or industrial uses. E.g. Ground nut, sesame.
- Ornamental crops – These are utilized for landscape gardening. E.g- Croton, Euphorbia.
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Question 9 of 93
9. Question
- _____ is the largest producer of bananas and mangoes in the world
Correct
Explanation
Our country is the largest producer of bananas and mangoes in the world. It is also the second largest producer of wheat and rice.
Incorrect
Explanation
Our country is the largest producer of bananas and mangoes in the world. It is also the second largest producer of wheat and rice.
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Question 10 of 93
10. Question
- Which of the following statement is correct?
- Growing crops in the field is a skilful job.
- Physical and mental skills are involved in this practice
- Different activities in crop production are ploughing, sowing, applying fertilizers, harvesting and seed storage
Correct
Explanation
Growing crops in the field is a skilful job. Physical and mental skills are involved in this practice. Different activities in crop production are ploughing, sowing, applying fertilizers, harvesting and seed storage. All these activities collectively have an effect on the yield of crops.
Incorrect
Explanation
Growing crops in the field is a skilful job. Physical and mental skills are involved in this practice. Different activities in crop production are ploughing, sowing, applying fertilizers, harvesting and seed storage. All these activities collectively have an effect on the yield of crops.
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Question 11 of 93
11. Question
- Which of the following statement is correct?
- Soil preparation is the first step in the crop production practice.
- The most important aspect in agricultural process is to loosen the bottom soil.
- The loosened soil helps in the growth of earthworm and soil microbes.
Correct
Explanation
Soil preparation is the first step in the crop production practice. The most important aspect in agricultural process is to loosen the topsoil. The loosened soil helps in the growth of earthworm and soil microbes.
Incorrect
Explanation
Soil preparation is the first step in the crop production practice. The most important aspect in agricultural process is to loosen the topsoil. The loosened soil helps in the growth of earthworm and soil microbes.
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Question 12 of 93
12. Question
- Which of the following are absorbed by plants through root from soil?
- Water
- Minerals
- Air
- Nutrients
Correct
Explanation
Earthworm and soil microbes add humus to the soil and are friendly to farmers. Plants absorb water, minerals, nutrients and air from the soil through their roots
Incorrect
Explanation
Earthworm and soil microbes add humus to the soil and are friendly to farmers. Plants absorb water, minerals, nutrients and air from the soil through their roots
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Question 13 of 93
13. Question
- By which of the following methods soil is prepared?
- Ploughing
- Levelling
- Basal manuring
Correct
Explanation
The soil is prepared by the following methods:
- Ploughing
- Levelling
- Basal manuring
Incorrect
Explanation
The soil is prepared by the following methods:
- Ploughing
- Levelling
- Basal manuring
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Question 14 of 93
14. Question
- Which of the following facilitate the availability of nutrients in the root zone of cultivating crops?
Correct
Explanation
Ploughing or tilling is the process of loosening and turning the soil up and down to facilitate the availability of nutrients in the root zone of the cultivating crop.
Incorrect
Explanation
Ploughing or tilling is the process of loosening and turning the soil up and down to facilitate the availability of nutrients in the root zone of the cultivating crop.
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Question 15 of 93
15. Question
- Assertion(A): A plough is made of wood and is drawn by a pair of bulls or horses used for
levelling of soil
Reason(R): Plough is mainly used for tilling the soil, to add fertilisers to the crop, remove weeds
and other waste materials from the field and also to turn the soil
Correct
Explanation
Plough is mainly used for tilling the soil, to add fertilisers to the crop, remove weeds and other waste materials from the field and also to turn the soil. A plough is made of wood and is drawn by a pair of bulls or horses.
Incorrect
Explanation
Plough is mainly used for tilling the soil, to add fertilisers to the crop, remove weeds and other waste materials from the field and also to turn the soil. A plough is made of wood and is drawn by a pair of bulls or horses.
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Question 16 of 93
16. Question
- The main part of the plough is called as___________
Correct
Explanation
A plough contains a strong and a sharp triangular iron strip known as ploughshare. The main part of the plough is a long log of wood which is called plough shaft. The other end is attached to a beam which is placed on the bull’s neck.
Incorrect
Explanation
A plough contains a strong and a sharp triangular iron strip known as ploughshare. The main part of the plough is a long log of wood which is called plough shaft. The other end is attached to a beam which is placed on the bull’s neck.
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Question 17 of 93
17. Question
- Which of the following statement about hoe is correct?
- It is a simple agricultural tool which is used to till the land, remove weeds and dig up soil
- It has a long wooden rod with a bent iron plate at both the ends
Correct
Explanation
Hoe is a simple agricultural tool which is used to till the land, remove weeds and dig up soil. It has a long wooden rod with a bent iron plate at one end. The other end may be attached to an animal.
Incorrect
Explanation
Hoe is a simple agricultural tool which is used to till the land, remove weeds and dig up soil. It has a long wooden rod with a bent iron plate at one end. The other end may be attached to an animal.
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Question 18 of 93
18. Question
- Which of the following statement is correct?
- Cultivator involves the use of a tractor to drive the cultivator
- Cultivators also kill weeds and dig up unwanted vegetation available in the field
- Cultivators takes much more time
Correct
Explanation
Cultivator involves the use of a tractor to drive the cultivator. Cultivators also kill weeds and dig up unwanted vegetation available in the field. Nowadays ploughing is done by tractor-driven cultivator. The use of cultivator saves labour and time
Incorrect
Explanation
Cultivator involves the use of a tractor to drive the cultivator. Cultivators also kill weeds and dig up unwanted vegetation available in the field. Nowadays ploughing is done by tractor-driven cultivator. The use of cultivator saves labour and time
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Question 19 of 93
19. Question
- Which of the following statement is incorrect?
- The levelling of soil is done with an implement called the leveller, which is a heavy wooden or iron plank.
- Levelling the field also helps in uniform distribution of water during irrigation.
Correct
Explanation
Once the field is ploughed, the topsoil is quite loose. The levelling of soil is done with an implement called the leveller, which is a heavy wooden or iron plank. Levelling the field also helps in uniform distribution of water during irrigation.
Incorrect
Explanation
Once the field is ploughed, the topsoil is quite loose. The levelling of soil is done with an implement called the leveller, which is a heavy wooden or iron plank. Levelling the field also helps in uniform distribution of water during irrigation.
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Question 20 of 93
20. Question
- Assertion(A): To increase the fertility of the soil, we add manure to the soil even before we begin
the sowing
Reason(R): Application of green manure and farm yard manure will not enhance the growth
Correct
Explanation
Manuring means adding manure to the soil. Manure contains many nutrients required for the growth of crop plants. To increase the fertility of the soil, we add manure to the soil even before we begin the sowing because it gets properly incorporated into the soil. Application of green manure and farm yard manure will always enhance the growth and yield of the crops.
Incorrect
Explanation
Manuring means adding manure to the soil. Manure contains many nutrients required for the growth of crop plants. To increase the fertility of the soil, we add manure to the soil even before we begin the sowing because it gets properly incorporated into the soil. Application of green manure and farm yard manure will always enhance the growth and yield of the crops.
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Question 21 of 93
21. Question
- _____ is the second step in crop production
Correct
Explanation
Sowing of Seeds is the second step in crop production. Once the soil preparation is over, sowing of the seeds can be done.
Incorrect
Explanation
Sowing of Seeds is the second step in crop production. Once the soil preparation is over, sowing of the seeds can be done.
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Question 22 of 93
22. Question
- Assertion(A): Sowing is the actual process of planting the seeds in the soil.
Reason(R): The seeds that are sown have to be selected very carefully to have high quality.
Correct
Explanation
Sowing is the actual process of planting the seeds in the soil. The seeds that are sown have to be selected very carefully to have high quality. Various methods are followed for sowing the seeds.
Incorrect
Explanation
Sowing is the actual process of planting the seeds in the soil. The seeds that are sown have to be selected very carefully to have high quality. Various methods are followed for sowing the seeds.
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Question 23 of 93
23. Question
- ____ method is also called broadcasting
Correct
Explanation
The scattering of seeds by hand is the simplest method of sowing seeds. This method is also called broadcasting. This is the most economical method of sowing seed.
Incorrect
Explanation
The scattering of seeds by hand is the simplest method of sowing seeds. This method is also called broadcasting. This is the most economical method of sowing seed.
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Question 24 of 93
24. Question
- Which of the following statement is correct?
- Seed Drill is an old method of sowing seeds
- Seed drills ensure that the seeds are planted at equal intervals and at the correct depth in the soil
- It is usually done by attaching iron drills to a tractor
Correct
Explanation
Seed Drill is a modern method of sowing seeds. It is a better and more efficient method than sowing by hand. It is usually done by attaching iron drills to a tractor. Seed drills ensure that the seeds are planted at equal intervals and at the correct depth in the soil.
Incorrect
Explanation
Seed Drill is a modern method of sowing seeds. It is a better and more efficient method than sowing by hand. It is usually done by attaching iron drills to a tractor. Seed drills ensure that the seeds are planted at equal intervals and at the correct depth in the soil.
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Question 25 of 93
25. Question
- Dibbling is a done with the help of_______
Correct
Explanation
Dibbling is the placement of seed material in a furrow, pit or hole at predetermined spacing with a dibble, more commonly by hand. Soil around the hole is pressed with hand or leg for moist soil contact.
Incorrect
Explanation
Dibbling is the placement of seed material in a furrow, pit or hole at predetermined spacing with a dibble, more commonly by hand. Soil around the hole is pressed with hand or leg for moist soil contact.
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Question 26 of 93
26. Question
- Assertion(A): Transplanting is removal of an actively growing seedling from one place and
planting it in the main field for further growth till harvest
Reason(R): Transplanting makes use of pre grown plants, seedlings or vegetative propagated
Clones
Correct
Explanation
Transplanting is removal of an actively growing seedling from one place (usually nursery bed) and planting it in the main field for further growth till harvest. Transplanting makes use of pre grown plants, seedlings or vegetative propagated clones.
Incorrect
Explanation
Transplanting is removal of an actively growing seedling from one place (usually nursery bed) and planting it in the main field for further growth till harvest. Transplanting makes use of pre grown plants, seedlings or vegetative propagated clones.
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Question 27 of 93
27. Question
- Which of the following statement is correct?
- If seeds are simply scattered on top they are likely to be blown away or eaten by animals or birds
- If we sow them too deep into the ground, they will not germinate due to lack of air
- The seeds must be sown at the correct depth in the soil
Correct
Explanation
If seeds are simply scattered on top they are likely to be blown away or eaten by animals or birds. At the same time, if we sow them too deep into the ground, they will not germinate due to lack of air. So, seeds must be sown at the correct depth in the soil.
Incorrect
Explanation
If seeds are simply scattered on top they are likely to be blown away or eaten by animals or birds. At the same time, if we sow them too deep into the ground, they will not germinate due to lack of air. So, seeds must be sown at the correct depth in the soil.
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Question 28 of 93
28. Question
- Assertion(A): The seeds that are sown should be of the highest quality
Reason(R): Planting seeds at equidistance have been proved to increase the yield of the farm.
Correct
Explanation
Seeds must be sown in proper distance and the distance is varied from one crop to other crop. Planting seeds at equidistance have been proved to increase the yield of the farm. The seeds that are sown should be of the highest quality. They should be free from all diseases.
Incorrect
Explanation
Seeds must be sown in proper distance and the distance is varied from one crop to other crop. Planting seeds at equidistance have been proved to increase the yield of the farm. The seeds that are sown should be of the highest quality. They should be free from all diseases.
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Question 29 of 93
29. Question
- The substances which are added to the soil, that enhance nutrients of soil are called as____
Correct
Explanation
The substances which are added to the soil in the form of nutrients to enhance the growth of plants are called manure and fertilisers. The term fertility refers to the inherent capacity of a soil to supply nutrients to crop plants in adequate amounts and in suitable proportions.
Incorrect
Explanation
The substances which are added to the soil in the form of nutrients to enhance the growth of plants are called manure and fertilisers. The term fertility refers to the inherent capacity of a soil to supply nutrients to crop plants in adequate amounts and in suitable proportions.
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Question 30 of 93
30. Question
30._____ is an organic substance obtained from the decomposition of plants or animal wastes
Correct
Explanation
Manure is an organic substance obtained from the decomposition of plants or animal wastes. Farmers dump plant and animal waste in pits at open places and allow it to decompose.
Incorrect
Explanation
Manure is an organic substance obtained from the decomposition of plants or animal wastes. Farmers dump plant and animal waste in pits at open places and allow it to decompose.
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Question 31 of 93
31. Question
- Which of the following can be increased by manure?
- Water-holding capacity
- Soil aggregation
- Soil aeration
- Permeability
Correct
Explanation
Regular addition of organic manures helps to maintain the soil fertility, protecting them from wind and water erosion and preventing nutrient losses through runoff and leaching. This also increases water-holding capacity, soil aggregation, soil aeration and permeability.
Incorrect
Explanation
Regular addition of organic manures helps to maintain the soil fertility, protecting them from wind and water erosion and preventing nutrient losses through runoff and leaching. This also increases water-holding capacity, soil aggregation, soil aeration and permeability.
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Question 32 of 93
32. Question
- Fertilizers are mainly composed of____
- Urea
- Ammonium sulphate
- NPK
Correct
Explanation
Fertilizer is a substance which is added to the soil to improve plants’ growth and yield. Fertilizers are composed mainly of urea, ammonium sulphate, super phosphate, potash, NPK (Nitrogen, Phosphorus, Potassium).
Incorrect
Explanation
Fertilizer is a substance which is added to the soil to improve plants’ growth and yield. Fertilizers are composed mainly of urea, ammonium sulphate, super phosphate, potash, NPK (Nitrogen, Phosphorus, Potassium).
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Question 33 of 93
33. Question
- Which of the following statement is correct?
- Water alone is important for the proper growth and development of plants
- Plants absorb water from their surrounding with the help of the root system.
- The time and frequency of irrigation varies from crop to crop, soil to soil and season to season.
Correct
Explanation
Water is important for the proper growth and development of plants. Plants absorb water from their surrounding with the help of the root system. The supply of water to crops at regular intervals is called irrigation.
Incorrect
Explanation
Water is important for the proper growth and development of plants. Plants absorb water from their surrounding with the help of the root system. The supply of water to crops at regular intervals is called irrigation.
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Question 34 of 93
34. Question
- Which of the following is not a source of irrigation?
Correct
Explanation
Fertilizers can also be applied through the irrigation. The various sources of irrigation are wells, tube wells, ponds, lakes, rivers, dams and canal.
Incorrect
Explanation
Fertilizers can also be applied through the irrigation. The various sources of irrigation are wells, tube wells, ponds, lakes, rivers, dams and canal.
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Question 35 of 93
35. Question
- How many methods of irrigation are carried out?
Correct
Explanation
Irrigation can be carried out by two different methods.
- Traditional Methods
- Modern Methods
Incorrect
Explanation
Irrigation can be carried out by two different methods.
- Traditional Methods
- Modern Methods
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Question 36 of 93
36. Question
- Which of the following statement about manual irrigation is correct?
- In these methods, irrigation is done manually
- Pumps are also commonly used for lifting water from various sources
- Diesel, biogas, electricity and solar energy are the few important sources of energy needed to run these pumps.
Correct
Explanation
In traditional methods, irrigation is done manually. Here, a farmer pulls out water from wells or canals by himself or using cattle and carries to farming fields. Pumps are also commonly used for lifting water from various sources. Diesel, biogas, electricity and solar energy are the few important sources of energy needed to run these pumps.
Incorrect
Explanation
In traditional methods, irrigation is done manually. Here, a farmer pulls out water from wells or canals by himself or using cattle and carries to farming fields. Pumps are also commonly used for lifting water from various sources. Diesel, biogas, electricity and solar energy are the few important sources of energy needed to run these pumps.
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Question 37 of 93
37. Question
- The main advantage of traditional method is_____
Correct
Explanation
The main advantage of traditional method is that it is cheaper. But its efficiency is poor because of the uneven distribution of water. It also leads to heavy water loss.
Incorrect
Explanation
The main advantage of traditional method is that it is cheaper. But its efficiency is poor because of the uneven distribution of water. It also leads to heavy water loss.
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Question 38 of 93
38. Question
- Which of the following statement is incorrect?
- The modern irrigation methods help to overcome the problems exist in the traditional methods
- It also facilitates the even distribution of moisture in the field
Correct
Explanation
The modern irrigation methods help to overcome the problems exist in the traditional methods. It also facilitates the even distribution of moisture in the field.
Incorrect
Explanation
The modern irrigation methods help to overcome the problems exist in the traditional methods. It also facilitates the even distribution of moisture in the field.
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Question 39 of 93
39. Question
- Which of the following statement about Sprinkler System is correct?
- This method is much advisable in areas were water scarcity does not exists
- Here a pump is connected to pipes which generate pressure and water is sprinkled through the fine nozzles of pipes.
Correct
Explanation
A sprinkler system, as its name suggests, sprinkles water over the crop and helps in an even distribution of water. This method is much advisable in areas facing water scarcity. Here a pump is connected to pipes which generate pressure and water is sprinkled through the fine nozzles of pipes.
Incorrect
Explanation
A sprinkler system, as its name suggests, sprinkles water over the crop and helps in an even distribution of water. This method is much advisable in areas facing water scarcity. Here a pump is connected to pipes which generate pressure and water is sprinkled through the fine nozzles of pipes.
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Question 40 of 93
40. Question
- Which of the following statement about drip irrigation is correct?
- In drip system, water is released drop by drop exactly at the root zone using a hose or pipe
- This method is considered as the effective one in regions where the availability of water is less
Correct
Explanation
In drip system, water is released drop by drop exactly at the root zone using a hose or pipe. This method is considered as the effective one in regions where the availability of water is less.
Incorrect
Explanation
In drip system, water is released drop by drop exactly at the root zone using a hose or pipe. This method is considered as the effective one in regions where the availability of water is less.
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Question 41 of 93
41. Question
- The global population is expected to be 9 billion by the year____
Correct
Explanation
The global population is expected to be 9 billion by the year 2050. So, efficient and sustainable water use is needed for our own generation and future generations
Incorrect
Explanation
The global population is expected to be 9 billion by the year 2050. So, efficient and sustainable water use is needed for our own generation and future generations
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Question 42 of 93
42. Question
- Agriculture activities alone utilize____% of the available fresh water resources
Correct
Explanation
Agriculture activities alone utilize 70% of the available fresh water resources. So, drip irrigation is a better solution for economical use of water.
Incorrect
Explanation
Agriculture activities alone utilize 70% of the available fresh water resources. So, drip irrigation is a better solution for economical use of water.
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Question 43 of 93
43. Question
- The undesirable plants grown along with the main crops are called_____
Correct
Explanation
In an agriculture field many other undesirable plants may grow naturally along with the main crop. These undesirable plants are called weeds. The removal of weeds is called weeding.
Incorrect
Explanation
In an agriculture field many other undesirable plants may grow naturally along with the main crop. These undesirable plants are called weeds. The removal of weeds is called weeding.
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Question 44 of 93
44. Question
- Which of the following statement is correct?
- Weeding is an important process because weeds compete with the crop plants for the nutrients, sunlight, water, space and other resources
- Farmers adopt many ways to remove weeds and control their growth
Correct
Explanation
Weeding is an important process because weeds compete with the crop plants for the nutrients, sunlight, water, space and other resources. It results in the undernourishment of crops and leads to low yield. It is mandatory to remove seeds from the field to achieve the expected yield. Farmers adopt many ways to remove weeds and control their growth. Some of them are explained below.
Incorrect
Explanation
Weeding is an important process because weeds compete with the crop plants for the nutrients, sunlight, water, space and other resources. It results in the undernourishment of crops and leads to low yield. It is mandatory to remove seeds from the field to achieve the expected yield. Farmers adopt many ways to remove weeds and control their growth. Some of them are explained below.
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Question 45 of 93
45. Question
- _____ is the oldest and most efficient method for controlling weeds
Correct
Explanation
Mechanical method is the most common method in which weeds are destroyed physically. Hand pulling or weeding with the help of weeding hole is the oldest and most efficient method for controlling weeds.
Incorrect
Explanation
Mechanical method is the most common method in which weeds are destroyed physically. Hand pulling or weeding with the help of weeding hole is the oldest and most efficient method for controlling weeds.
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Question 46 of 93
46. Question
- ____ is one of the practical methods of destroying weeds of all categories.
Correct
Explanation
Tillage methods is one of the practical methods of destroying weeds of all categories. Weeds are buried in the soil and also exposed to sun heat by deep ploughing.
Incorrect
Explanation
Tillage methods is one of the practical methods of destroying weeds of all categories. Weeds are buried in the soil and also exposed to sun heat by deep ploughing.
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Question 47 of 93
47. Question
- Deep ploughing after harvest of___ crop is useful for destroying annual and perennial weeds
Correct
Explanation
Deep ploughing after harvest of Rabi crop and exposing underground parts of weeds to strong sunlight during summer months is useful for destroying many annual and perennial weeds.
Incorrect
Explanation
Deep ploughing after harvest of Rabi crop and exposing underground parts of weeds to strong sunlight during summer months is useful for destroying many annual and perennial weeds.
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Question 48 of 93
48. Question
- Assertion(A): In Biological weed control method bio agents like insects and pathogens are used to control weeds
Reason(R): The objectives of biological control are not eradication, but reduction and
regulation of the weed population
Correct
Explanation
In Biological weed control method, bio agents like insects and pathogens are used to control weeds. The objectives of biological control are not eradication, but reduction and regulation of the weed population.
Incorrect
Explanation
In Biological weed control method, bio agents like insects and pathogens are used to control weeds. The objectives of biological control are not eradication, but reduction and regulation of the weed population.
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Question 49 of 93
49. Question
- Which of the following statement is correct?
- Chemical methods are very effective in certain cases and have great scope in weed control
- These chemicals are mixed with water and sprayed over the crops.
Correct
Explanation
Chemical methods are very effective in certain cases and have great scope in weed control. The chemicals used for killing the weeds or inhibiting their growth are called herbicides. These chemicals are mixed with water and sprayed over the crops.
Incorrect
Explanation
Chemical methods are very effective in certain cases and have great scope in weed control. The chemicals used for killing the weeds or inhibiting their growth are called herbicides. These chemicals are mixed with water and sprayed over the crops.
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Question 50 of 93
50. Question
- There are over____ species of weeds around the world.
Correct
Explanation
Integrated weed management combines different agronomic practices and herbicides use to manage weeds, so that the reliance on any one weed control technique is reduced. There are over 30000 species of weeds around the world.
Incorrect
Explanation
Integrated weed management combines different agronomic practices and herbicides use to manage weeds, so that the reliance on any one weed control technique is reduced. There are over 30000 species of weeds around the world.
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Question 51 of 93
51. Question
- How weed species around the world causes serious losses to crops?
Correct
Explanation
Out of 30000 species around the world, 18000 species cause serious losses to crops. The continuous use of the same method leads to building up of tolerant species. Therefore, a suitable combination of different methods of weed control should be practiced for minimizing the losses caused by weeds in different crops and also for preventing `environmental pollution.
Incorrect
Explanation
Out of 30000 species around the world, 18000 species cause serious losses to crops. The continuous use of the same method leads to building up of tolerant species. Therefore, a suitable combination of different methods of weed control should be practiced for minimizing the losses caused by weeds in different crops and also for preventing `environmental pollution.
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Question 52 of 93
52. Question
- Which of the following crops are harvested using Manual harvesting?
Correct
Explanation
Certain crops are harvested without using tools. Ground nut crop can be harvested by uprooting with hand, provided soil moisture is adequate for hand pulling. The same method is used in the case of green gram, black gram and horse gram.
Incorrect
Explanation
Certain crops are harvested without using tools. Ground nut crop can be harvested by uprooting with hand, provided soil moisture is adequate for hand pulling. The same method is used in the case of green gram, black gram and horse gram.
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Question 53 of 93
53. Question
53._____ is the process of separating the grains from their chaffs or pods
Correct
Explanation
The process of separating the grains from their chaffs or pods is threshing. After threshing, we must separate the grains from the chaffs. Winnowing is the process of separating the grains.
Incorrect
Explanation
The process of separating the grains from their chaffs or pods is threshing. After threshing, we must separate the grains from the chaffs. Winnowing is the process of separating the grains.
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Question 54 of 93
54. Question
- Which of the following statement is correct?
- The crops need close examination to ensure that harvesting is not premature.
- Premature harvesting leads to shedding of seeds and loss of crop
- If the crops are over ripened, they lose their value in the market and it becomes inconsumable in certain cases
Correct
Explanation
There are various factors to be considered before harvesting the crops. The crops need close examination to ensure that harvesting is not premature. Premature harvesting leads to shedding of seeds and loss of crop. And if the crops are over ripened, they lose their value in the market and it becomes inconsumable in certain cases.
Incorrect
Explanation
There are various factors to be considered before harvesting the crops. The crops need close examination to ensure that harvesting is not premature. Premature harvesting leads to shedding of seeds and loss of crop. And if the crops are over ripened, they lose their value in the market and it becomes inconsumable in certain cases.
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Question 55 of 93
55. Question
- Assertion(A): Storage is an important aspect of postharvest technology, because the crop is
seasonally produced but consumed through-out the year
Reason(R): Before storing, harvested grains should be made free from moisture
Correct
Explanation
Storage is an important aspect of postharvest technology, because the crop is seasonally produced but consumed through-out the year. Therefore, supply of the produce has to be maintained by proper storage. Before storing, harvested grains should be made free from moisture.
Incorrect
Explanation
Storage is an important aspect of postharvest technology, because the crop is seasonally produced but consumed through-out the year. Therefore, supply of the produce has to be maintained by proper storage. Before storing, harvested grains should be made free from moisture.
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Question 56 of 93
56. Question
- Spraying of Chemical vapors to minimize pest and insets is called as____
Correct
Explanation
Any moisture in the stored grins will lead to the growth of microorganism. Silos and granaries are used for the storage of grains on large scale. Chemical vapors are sprayed to minimize pest and insets in godowns. This is called fumigation.
Incorrect
Explanation
Any moisture in the stored grins will lead to the growth of microorganism. Silos and granaries are used for the storage of grains on large scale. Chemical vapors are sprayed to minimize pest and insets in godowns. This is called fumigation.
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Question 57 of 93
57. Question
- When was FCI set up in Chennai?
Correct
Explanation
Food Corporation of India (FCI) was set up on 14th January 1965 at Chennai with the objective of distribution of food grains throughout the country for Public Distribution System (PDS) and maintaining a satisfactory level of operational and buffer stocks of food grains to ensure National Food Security.
Incorrect
Explanation
Food Corporation of India (FCI) was set up on 14th January 1965 at Chennai with the objective of distribution of food grains throughout the country for Public Distribution System (PDS) and maintaining a satisfactory level of operational and buffer stocks of food grains to ensure National Food Security.
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Question 58 of 93
58. Question
- Which of the following statement is incorrect?
- The stored grains are inspected from time to time to make sure that they are free from diseases and pests.
- The different categories of agricultural produce needing storage are food grains, oil seeds, seeds and folder.
Correct
Explanation
The stored grains are inspected from time to time to make sure that they are free from diseases and pests. In our country, grains are stored on a large scale in government-owned godown. The different categories of agricultural produce needing storage are food grains, oil seeds, seeds and folder.
Incorrect
Explanation
The stored grains are inspected from time to time to make sure that they are free from diseases and pests. In our country, grains are stored on a large scale in government-owned godown. The different categories of agricultural produce needing storage are food grains, oil seeds, seeds and folder.
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Question 59 of 93
59. Question
- How many methods of crop production are there?
Correct
Explanation
Crop rotation is planting a series of different crops in the same field following a defined order. Mono cropping and mixed cropping are the two methods used in crop production
Incorrect
Explanation
Crop rotation is planting a series of different crops in the same field following a defined order. Mono cropping and mixed cropping are the two methods used in crop production
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Question 60 of 93
60. Question
- Which of the following statement is correct?
- Mono cropping is the repeated planting of the same crop in the same field year after year.
- Mixed cropping is the cultivation of two or more than two crops simultaneously on the same land without any pattern
Correct
Explanation
Mono cropping is the repeated planting of the same crop in the same field year after year. Mixed cropping is the cultivation of two or more than two crops simultaneously on the same land without any pattern.
Incorrect
Explanation
Mono cropping is the repeated planting of the same crop in the same field year after year. Mixed cropping is the cultivation of two or more than two crops simultaneously on the same land without any pattern.
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Question 61 of 93
61. Question
- Assertion(A): Crop rotation has many advantages
Reason(R): Many crops like legumes may have positive effects on succeeding crops in the rotation, leading to greater production over all
Correct
Explanation
Crop rotation has many advantages. Many crops like legumes may have positive effects on succeeding crops in the rotation, leading to greater production over all. A shallow rooted grain crop, deep rooted cash crop and restorative crop (legume crop) should be included in the rotation for maintaining soil productivity.
Incorrect
Explanation
Crop rotation has many advantages. Many crops like legumes may have positive effects on succeeding crops in the rotation, leading to greater production over all. A shallow rooted grain crop, deep rooted cash crop and restorative crop (legume crop) should be included in the rotation for maintaining soil productivity.
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Question 62 of 93
62. Question
- The leguminous crops should follow non-leguminous to have atmospheric___ to succeeding crops
Correct
Explanation
The leguminous crops should follow non- leguminous crops to have atmospheric nitrogen to succeeding crops. It helps in maintaining a better balance of nutrients in the soil.
Incorrect
Explanation
The leguminous crops should follow non- leguminous crops to have atmospheric nitrogen to succeeding crops. It helps in maintaining a better balance of nutrients in the soil.
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Question 63 of 93
63. Question
- Which of the following crops can be intercropped?
1.Rice
2. Maize
3. Black gram
4. Urad gram
Correct
Explanation
Weed problem is less in intercropping system compared to their sole crops. Maize and Black gram can be intercropped.
Incorrect
Explanation
Weed problem is less in intercropping system compared to their sole crops. Maize and Black gram can be intercropped.
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Question 64 of 93
64. Question
- _____ plants have symbiotic relation with the Rhizobium bacteria found in their root
Correct
Explanation
Leguminous plants have symbiotic relation with the Rhizobium bacteria found in the root nodules of these plants. These plants have the ability to fix atmospheric nitrogen in their roots with the help of these bacteria.
Incorrect
Explanation
Leguminous plants have symbiotic relation with the Rhizobium bacteria found in the root nodules of these plants. These plants have the ability to fix atmospheric nitrogen in their roots with the help of these bacteria.
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Question 65 of 93
65. Question
- Which of the following are included in legumes?
1. Beans
2. Peanut
3. Carrot
Correct
Explanation
The fruits of leguminous plants are called legumes. Examples of legumes include alfalfa, clover, peas, beans, lentils, lupins, mesquite, carob, soy, and peanuts. These plants are used in crop rotation to multiply soil nitrogen.
Incorrect
Explanation
The fruits of leguminous plants are called legumes. Examples of legumes include alfalfa, clover, peas, beans, lentils, lupins, mesquite, carob, soy, and peanuts. These plants are used in crop rotation to multiply soil nitrogen.
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Question 66 of 93
66. Question
- Which of the following statement is correct?
1. Seed bank is a place where seeds are stored in order to preserve genetic diversity
2. Seeds may be viable for only hundred years
3. Seed banks are like seed libraries that contains valuable information about evolution strategies of plants
Correct
Explanation
Seed bank is a place where seeds are stored in order to preserve genetic diversity. Seeds may be viable for hundreds and even thousands of years. Seed banks are like seed libraries that contains valuable information about evolution strategies of plants.
Incorrect
Explanation
Seed bank is a place where seeds are stored in order to preserve genetic diversity. Seeds may be viable for hundreds and even thousands of years. Seed banks are like seed libraries that contains valuable information about evolution strategies of plants.
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Question 67 of 93
67. Question
- Royal botanical garden at____ started collecting seeds formally as seed bank
Correct
Explanation
The Royal Botanical Gardens located in Kolkata first started collecting seeds formally as seed bank. Seed banks were created to store native varieties of seeds. With this initiative farmers have started preserving indigenous seeds and reducing their dependence on hybrid seeds from seed companies.
Incorrect
Explanation
The Royal Botanical Gardens located in Kolkata first started collecting seeds formally as seed bank. Seed banks were created to store native varieties of seeds. With this initiative farmers have started preserving indigenous seeds and reducing their dependence on hybrid seeds from seed companies.
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Question 68 of 93
68. Question
- Navadanya seed bank, a non-governmental organization located in____
Correct
Explanation
Navadanya seed bank, a non-governmental organization located in New Delhi conserve around 50,000 crop varieties, with the primary focus on preservation of grain species.
Incorrect
Explanation
Navadanya seed bank, a non-governmental organization located in New Delhi conserve around 50,000 crop varieties, with the primary focus on preservation of grain species.
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Question 69 of 93
69. Question
- Acharya Jagadish Chandra Bose Indian Botanic Garden located in____
Correct
Explanation
Acharya Jagadish Chandra Bose Indian Botanic Garden located in Kolkata was earlier called Royal Botanic Garden. This garden exhibits a wide variety of rare plants and a total collection of over 12,000 specimens. The area of this garden spreads over 109 hectares.
Incorrect
Explanation
Acharya Jagadish Chandra Bose Indian Botanic Garden located in Kolkata was earlier called Royal Botanic Garden. This garden exhibits a wide variety of rare plants and a total collection of over 12,000 specimens. The area of this garden spreads over 109 hectares.
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Question 70 of 93
70. Question
- Which of the following statement is correct?
- Seed balls are a mixture of soil, compost and plant seeds.
- Seed balls are prepared by nongovernment organization and enthusiastic school children to grow tree for ecosystem restoration.
- The concept of seed ball has potential to increase tree cover and also to improve the awareness among the people about conserving plants
Correct
Explanation
Seed balls are a mixture of soil, compost and plant seeds. These balls are thrown into land areas. With the monsoon set in, these planted seed balls will germinate into seedling. Seed balls are prepared by nongovernment organization and enthusiastic school children to grow tree for ecosystem restoration. The concept of seed ball has potential to increase tree cover and also to improve the awareness among the people about conserving plants.
Incorrect
Explanation
Seed balls are a mixture of soil, compost and plant seeds. These balls are thrown into land areas. With the monsoon set in, these planted seed balls will germinate into seedling. Seed balls are prepared by nongovernment organization and enthusiastic school children to grow tree for ecosystem restoration. The concept of seed ball has potential to increase tree cover and also to improve the awareness among the people about conserving plants.
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Question 71 of 93
71. Question
- _____ are also called organic seeds.
Correct
Explanation
Heirloom seeds are also called organic seeds. These seeds are generally produced from open-pollinated plants and they transfer their unique characteristics to the descendants.
Incorrect
Explanation
Heirloom seeds are also called organic seeds. These seeds are generally produced from open-pollinated plants and they transfer their unique characteristics to the descendants.
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Question 72 of 93
72. Question
- Assertion(A): An heirloom seed is the seed of plant that has been carefully cultivated and passed
down through many generations
Reason(A): Heirloom seed are harvested, dried and stored so that one can replant them in the
following season
Correct
Explanation
An heirloom seed is the seed of plant that has been carefully cultivated and passed down through many generations. Heirlooms are usually planted in small, isolated communities and they generally offer something of value to the grower. Heirloom seed are harvested, dried and stored so that one can replant them in the following season.
Incorrect
Explanation
An heirloom seed is the seed of plant that has been carefully cultivated and passed down through many generations. Heirlooms are usually planted in small, isolated communities and they generally offer something of value to the grower. Heirloom seed are harvested, dried and stored so that one can replant them in the following season.
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Question 73 of 93
73. Question
73. Which of the following statement is correct?
- The goal of preserving heirloom seed is to prevent any type of change due to outside influence
- Synthetic fertilizers, herbicides or pesticides are used for organic seeds
Correct
Explanation
The goal of preserving heirloom seed is to prevent any type of change due to outside influence. Synthetic fertilizers, herbicides or pesticides are not used for organic seeds but conventional fertilizer, herbicides and pesticides are used.
Incorrect
Explanation
The goal of preserving heirloom seed is to prevent any type of change due to outside influence. Synthetic fertilizers, herbicides or pesticides are not used for organic seeds but conventional fertilizer, herbicides and pesticides are used.
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Question 74 of 93
74. Question
- ____ is a species or group of species whose function reveals the qualitative status of environment.
Correct
Explanation
A bioindicator or biological indicator is any species or group of species whose function or status reveals the qualitative status of the environment.
Incorrect
Explanation
A bioindicator or biological indicator is any species or group of species whose function or status reveals the qualitative status of the environment.
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Question 75 of 93
75. Question
- Assertion(A): Biological indicators are used to document and understand changes in earth’s living systems especially changes caused by the activities of an expanding human population
Reason(R): Bio-indicators of soil health give us information about soil structure, development,
nutrient storage and biological activities.
Correct
Explanation
Biological indicators are used to document and understand changes in earth’s living systems especially changes caused by the activities of an expanding human population. Bio-indicators of soil health give us information about soil structure, development, nutrient storage and biological activities. Biological indicator characterises the state of an ecosystem and brings its modifications.
Incorrect
Explanation
Biological indicators are used to document and understand changes in earth’s living systems especially changes caused by the activities of an expanding human population. Bio-indicators of soil health give us information about soil structure, development, nutrient storage and biological activities. Biological indicator characterises the state of an ecosystem and brings its modifications.
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Question 76 of 93
76. Question
- ____ is a natural bio-indicator of climate change and air pollution effect.
Correct
Explanation
Lichen is a natural bio-indicator of climate change and air pollution effect. It is a combination of an alga and a fungus which live together in symbiotic association.
Incorrect
Explanation
Lichen is a natural bio-indicator of climate change and air pollution effect. It is a combination of an alga and a fungus which live together in symbiotic association.
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Question 77 of 93
77. Question
- Assertion(A): Lichen gives information about changes in climate, air quality and biological process.
Reason(R): Lichen is a sensitive environmental parameter like temperature humidity, wind and air pollutants.
Correct
Explanation
Lichen is a sensitive environmental parameter like temperature humidity, wind and air pollutants. It gives information about changes in climate, air quality and biological process. It is a combination of an alga and a fungus which live together in symbiotic association.
Incorrect
Explanation
Lichen is a sensitive environmental parameter like temperature humidity, wind and air pollutants. It gives information about changes in climate, air quality and biological process. It is a combination of an alga and a fungus which live together in symbiotic association.
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Question 78 of 93
78. Question
- ____ is a national institute for agricultural research, education and extension.
Correct
Explanation
The Indian Agricultural Research Institute (IARI) is a national institute for agricultural research, education and extension.
Incorrect
Explanation
The Indian Agricultural Research Institute (IARI) is a national institute for agricultural research, education and extension.
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Question 79 of 93
79. Question
79. Which of the following statement about IARI is correct?
- It is commonly known as the Pusa Institute
- It is financed and administrated by the ICAR
- This was responsible for research leading to the green revolution in India during 1950s
Correct
Explanation
Indian Agricultural Research Institute (IARI) commonly known as the Pusa Institute. It is financed and administrated by the ICAR (Indian Council of Agricultural Research). This was responsible for research leading to the green revolution in India during 1970s.
Incorrect
Explanation
Indian Agricultural Research Institute (IARI) commonly known as the Pusa Institute. It is financed and administrated by the ICAR (Indian Council of Agricultural Research). This was responsible for research leading to the green revolution in India during 1970s.
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Question 80 of 93
80. Question
- The Indian Council of Agricultural Research is an_____ body
Correct
Explanation
The Indian Council of Agricultural Research is an autonomous body responsible for co-ordinating agricultural education and research in India.
Incorrect
Explanation
The Indian Council of Agricultural Research is an autonomous body responsible for co-ordinating agricultural education and research in India.
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Question 81 of 93
81. Question
- Who serves as the president of ICAR?
Correct
Explanation
The union minister of agriculture serves as ICAR’s president. It functions under the Department of Agricultural Research and Education, Ministry of Agriculture. It is the largest network of agricultural research and education institutes in the world.
Incorrect
Explanation
The union minister of agriculture serves as ICAR’s president. It functions under the Department of Agricultural Research and Education, Ministry of Agriculture. It is the largest network of agricultural research and education institutes in the world.
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Question 82 of 93
82. Question
82. Which of the following statement is incorrect?
- Plant shows quick response to the nutrients applied by foliar feedings.
- The efficiency of nutrients uptake is considered to be 18-19 folds higher when nutrients are applied to the leaves, when compared with nutrients applied to soil
Correct
Explanation
Plant shows quick response to the nutrients applied by foliar feedings. The efficiency of nutrients uptake is considered to be 8-9 folds higher when nutrients are applied to the leaves, when compared with nutrients applied to soil. A foliar feeding is recommended when environmental conditions limit the uptake of nutrients by roots.
Incorrect
Explanation
Plant shows quick response to the nutrients applied by foliar feedings. The efficiency of nutrients uptake is considered to be 8-9 folds higher when nutrients are applied to the leaves, when compared with nutrients applied to soil. A foliar feeding is recommended when environmental conditions limit the uptake of nutrients by roots.
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Question 83 of 93
83. Question
- Which of the following is not a effective microorganism?
Correct
Explanation
Effective microorganisms are a culture of different effective microbes, commonly occurring in nature. Nitrogen fixers, phosphate stabilizers, photosynthetic micro-organisms, lactic acid bacteria, yeast, Rhizo bacteria and various fungi and actinomycetes are used as effective microorganisms.
Incorrect
Explanation
Effective microorganisms are a culture of different effective microbes, commonly occurring in nature. Nitrogen fixers, phosphate stabilizers, photosynthetic micro-organisms, lactic acid bacteria, yeast, Rhizo bacteria and various fungi and actinomycetes are used as effective microorganisms.
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Question 84 of 93
84. Question
84. Which of the following statement is correct?
- Vermiwash is a liquid that is collected after the passage of water though a column of worm action
- Vermi-wash is used as a foliar spray for crops.
Correct
Explanation
Vermiwash is a liquid that is collected after the passage of water though a column of worm action. It is a collection of excretory product and mucus secretion of earthworms along with micronutrients from the soil organic molecules. Vermiwash is used as a foliar spray for crops.
Incorrect
Explanation
Vermiwash is a liquid that is collected after the passage of water though a column of worm action. It is a collection of excretory product and mucus secretion of earthworms along with micronutrients from the soil organic molecules. Vermiwash is used as a foliar spray for crops.
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Question 85 of 93
85. Question
- Which of the following is not included in Panchgavya?
Correct
Explanation
Panchgavya is a promoter with a combination of five products obtained from the cow, which includes cow dung, cow’s urine, milk, curd and ghee. All the five products are collectively termed as panchgavya.
Incorrect
Explanation
Panchgavya is a promoter with a combination of five products obtained from the cow, which includes cow dung, cow’s urine, milk, curd and ghee. All the five products are collectively termed as panchgavya.
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Question 86 of 93
86. Question
86. Which of the following statement is incorrect?
- Panchgavya has the potential to play the role of promoting growth and providing immunity booster
- It can be prepared by the farmers themselves with the materials available on the farm.
- Pachgavya can be used for seed treatment also
Correct
Explanation
Panchgavya has the potential to play the role of promoting growth and providing immunity booster. It provides resistance to pests and increases the overall yield. It can be prepared by the farmers themselves with the materials available on the farm. Pachgavya can be used for seed treatment also.
Incorrect
Explanation
Panchgavya has the potential to play the role of promoting growth and providing immunity booster. It provides resistance to pests and increases the overall yield. It can be prepared by the farmers themselves with the materials available on the farm. Pachgavya can be used for seed treatment also.
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Question 87 of 93
87. Question
- Which of the following can be controlled by Biocontrol Methods?
Correct
Explanation
Bio-control or biological control is a method of controlling pests such as insects, mites, weed and plant diseases using other organisms. Bio predators, bio-pesticides, bio-repellents’ and bio-fertilizers are used for controlling microorganisms which cause damage to the crops, pests and insects.
Incorrect
Explanation
Bio-control or biological control is a method of controlling pests such as insects, mites, weed and plant diseases using other organisms. Bio predators, bio-pesticides, bio-repellents’ and bio-fertilizers are used for controlling microorganisms which cause damage to the crops, pests and insects.
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Question 88 of 93
88. Question
- The black kneel capsid eats more than____ fruits
Correct
Explanation
Th e black kneel capsid is an insect found on fruit trees. It eats more than 1000 fruit tree red spider mites per year.
Incorrect
Explanation
Th e black kneel capsid is an insect found on fruit trees. It eats more than 1000 fruit tree red spider mites per year.
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Question 89 of 93
89. Question
89. Which of the following statement is correct?
- Bio-pesticides are non-living organism or their derived parts which are used as biocontrol agents to protect crops against insect pests.
- Bio-pesticides are of different types based on their origin
- Entomopathegenic viruses, bacteria insecticides, particularly bacillus thuringiensis, entamofungal pathogens, protozoans and insect parasitic nematodes have been found to control important pests which affect crops.
Correct
Explanation
Bio-pesticides are living organism or their derived parts which are used as biocontrol agents to protect crops against insect pests. Entomopathegenic viruses, bacteria insecticides, particularly bacillus thuringiensis, entamofungal pathogens, protozoans and insect parasitic nematodes have been found to control important pests which affect crops. These bio-pesticides are commercially available but quite difficult to formulate in field conditions. Bio-pesticides are of different types based on their origin.
Incorrect
Explanation
Bio-pesticides are living organism or their derived parts which are used as biocontrol agents to protect crops against insect pests. Entomopathegenic viruses, bacteria insecticides, particularly bacillus thuringiensis, entamofungal pathogens, protozoans and insect parasitic nematodes have been found to control important pests which affect crops. These bio-pesticides are commercially available but quite difficult to formulate in field conditions. Bio-pesticides are of different types based on their origin.
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Question 90 of 93
90. Question
- ____ is a fungus used as a biological pesticide.
Correct
Explanation
Trichodermaviride is a fungus used as a biological pesticide. It is useful to control various disease caused by fungi such as wilt, rusting of leaves and root disease.
Incorrect
Explanation
Trichodermaviride is a fungus used as a biological pesticide. It is useful to control various disease caused by fungi such as wilt, rusting of leaves and root disease.
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Question 91 of 93
91. Question
91._____ is effectively used to control the pest Lepidoptera that attack cotton, maize plants.
Correct
Explanation
A culture of bacillus thuringiensis bacteria is effectively used to control the pest Lepidoptera that attack cotton, maize plants. Panchagavya and leaves decoction of some plants are also used as biopesticides.
Incorrect
Explanation
A culture of bacillus thuringiensis bacteria is effectively used to control the pest Lepidoptera that attack cotton, maize plants. Panchagavya and leaves decoction of some plants are also used as biopesticides.
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Question 92 of 93
92. Question
- Compound Azadiractin obtained from seeds of____ serves as a good insect-repellant
Correct
Explanation
Compound Azadiractin obtained from seeds of neem serves as a good insect-repellant. One of the earliest pesticides used by man was margosa leaves. The dried leaves repel the pests from stored grains.
Incorrect
Explanation
Compound Azadiractin obtained from seeds of neem serves as a good insect-repellant. One of the earliest pesticides used by man was margosa leaves. The dried leaves repel the pests from stored grains.
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Question 93 of 93
93. Question
- _____ involves in nitrogen fixation along with photosynthesis.
Correct
Explanation
Free living Cyano bacterium involves in nitrogen fixation along with photosynthesis. Eg. Anabeana, Nostoc. Symbiotic bacteria fix atmospheric nitrogen. eg. Rhizobium
Explanation
Free living Cyano bacterium involves in nitrogen fixation along with photosynthesis. Eg. Anabeana, Nostoc. Symbiotic bacteria fix atmospheric nitrogen. eg. Rhizobium
Incorrect
Explanation
Free living Cyano bacterium involves in nitrogen fixation along with photosynthesis. Eg. Anabeana, Nostoc. Symbiotic bacteria fix atmospheric nitrogen. eg. Rhizobium
Explanation
Free living Cyano bacterium involves in nitrogen fixation along with photosynthesis. Eg. Anabeana, Nostoc. Symbiotic bacteria fix atmospheric nitrogen. eg. Rhizobium
Leaderboard: Crop Production And Management 8th Science Lesson 21 Questions in English
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