virtual academy for the semi arid tropics course on groundnut production practices module v...

Virtual Academy for the Semi Arid Tropics

Course on Groundnut ProductionPractices

Module V

Groundnut Nutrition

There are 20 questions in this exercise in multiple choice format.

Answer by clicking on one of the red letters (A, B, C, Or D). You will get a feedback to your response.

Click on the or button placed on the screen.

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Module V

Groundnut Nutrition

1. Application of manures and fertilizers is important in groundnut because

A. it is a rainfed crop.

B. it is a non-legume crop.

C. it is mostly grown in black soils.

D. its energy requirements are high.

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Module V

Groundnut Nutrition

2. Groundnut do not need nitrogen application as the crop can utilize the nitrogen from nitrogen fixation.

A. False statement

B. True statement

C. Depends on variety grown

D. Depends on amount of rainfall

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Module V

Groundnut Nutrition

3. Why calcium nutrition is interesting in groundnut.

A. Soils are low in calcium

B. Calcium do not move in soils

C. Because it is a secondary nutrient

D. Calcium in the plant is not available to developing pods.

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Module V

Groundnut Nutrition

4. Sufficient availability of nitrogen to groundnut crop is indicated by

A. poor nodulation.

B. early flowering.

C. dark green leaves.

D. Early podding.

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Module V

Groundnut Nutrition

5. What happens if 100 kg N/ha is applied to groundnut?

A. Improved nodulation.

B. Early flowering.

C. Excessive vegetative growth.

D. Better kernel development.

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Module V

Groundnut Nutrition

6. Why ammonium sulfate is better than urea application to groundnut?

A. Ammonium sulfate contains less nitrogen.

B. Ammonium sulfate is cheaper.

C. Ammonium sulfate is easily available.

D. Ammonium sulfate contains sulfur which is beneficial to groundnut crop.

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Module V

Groundnut Nutrition

7. Nitrogen fixation occurs in groundnut due to its association with

A. a type of fungus.

B. a type of bacteria.

C. nitrogen rich soil.

D. nitrogen poor soil.

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Module V

Groundnut Nutrition

8. Where actually the nitrogen fixation takes place in groundnut plants?

A. In leaves.

B. In stems.

C. In roots.

D. In nodules.

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Module V

Groundnut Nutrition

9. How can you identify that the nitrogen fixation is low or poor in groundnut crop?

A. Examine the nodules.

B. Examine the roots and nodules.

C. Examine the flowers.

D. Examine the kernels.

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Module V

Groundnut Nutrition

10. Which phosphatic fertilizer is useful to groundnut crop?

A. Rock phosphate

B. Super phosphate

C. Di-ammonium phosphate (DAP)

D. 14-35-14 complex fertilizer

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Module V

Groundnut Nutrition

11. Most of the Indian soils are rich in potassium.

So, there is no need to apply potassium to groundnut crop.

A. I agree with this statement

B. I do not agree

C. I need more information to decide on potassium application

D. I am not sure

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Module V

Groundnut Nutrition

12. What is the source for calcium application to groundnut crop?

A. Sulfur

B. Ammonium Sulfate

C. Gypsum

D. Acid lime

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Module V

Groundnut Nutrition

13. At what stage of groundnut crop calcium is applied?

A. At final ploughing

B. At sowing

C. At peak flowering

D. At any stage of the crop

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Module V

Groundnut Nutrition

14. What is the recommended rate of gypsum application to groundnut crop?

A. 300 kg/ha

B. 100 kg/ha

C. 50 kg/ha

D. 30 kg/ha

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Module V

Groundnut Nutrition

15. Sulfur application to groundnut crop improves

A. protein content.

B. pod development.

C. kernel development.

D. oil content.

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Module V

Groundnut Nutrition

16. Why micronutrient application to groundnut has become important recently?

A. Growing of improved varieties.

B. Because of irrigation.

C. Continued use of common fertilizers.

D. Intercropping with other crops.

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Module V

Groundnut Nutrition

17. The most frequently deficient micronutrient in

groundnut growing areas.

A. Copper

B. Molybdenum

C. Manganese

D. Zinc

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Module V

Groundnut Nutrition

18. The micronutrient which helps in good kernel development in groundnut.

A. Boron

B. Molybdenum

C. Iron

D. Zinc

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Module V

Groundnut Nutrition

19. What should be the basis for deciding the amount of manures and fertilizers to groundnut?

A. Plant uptake

B. Variety grown

C. Amount of rainfall

D. Soil test report

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Module V

Groundnut Nutrition

20. What happens with improper incorporation of

partially decomposed organic manures to groundnut crop?

A. Unavailability of micronutrients

B. Increases soil pH

C. Utilizes more soil moisture

D. Results in problems of germination and seedling diseases

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Module V

Groundnut Nutrition

Thank you for completing this exercise.

Now you may review this Module or select next Module i.e. Module VI from Course contents.



Module V

Groundnut Nutrition

Your answer is not correct.

The correct answer is:

Application of manures and fertilizers is important in groundnut because its energy requirements are high.



Module V

Groundnut Nutrition

Your answer is correct.

Application of manures and fertilizers is important in groundnut because its energy requirements are high.



Module V

Groundnut Nutrition

Your are right.

The demand for nitrogen is high in the early stages of groundnut growth when nitrogen fixation has not yet started. So, a starter dose of nitrogen application is important for getting higher groundnut yields.



Module V

Groundnut Nutrition



It is a false statement.

The demand for nitrogen is high in the early stages of groundnut growth when nitrogen fixation has not yet started. So, a starter dose of nitrogen application is important for getting higher groundnut yields.



Module V

Groundnut Nutrition

Your are right.

Calcium demand is high at the time of pod filling stage, but the calcium in the plant body is not available for the developing pods.



Module V

Groundnut Nutrition



Calcium demand is high at the time of pod filling stage, but the calcium in the plant body is not available for the developing pods.



Module V

Groundnut Nutrition

Your are right.

Sufficient availability of nitrogen to groundnut crop is reflected in dark green color of stems and leaves, and vigorous growth.



Module V

Groundnut Nutrition



Sufficient availability of nitrogen to groundnut crop is reflected in dark green color of stems and leaves, and vigorous growth.



Module V

Groundnut Nutrition

Your are right.

Excess of nitrogen results in too much of vegetative growth at the expense of groundnut pod production.



Module V

Groundnut Nutrition


Excessive nitrogen application reduces nitrogen fixation and delays flowering.


Excess of nitrogen results in too much of vegetative growth at the expense of groundnut pod production.



Module V

Groundnut Nutrition

Your are right.

Ammonium sulfate also contains sulfur (16%), an important nutrient for groundnut crop.



Module V

Groundnut Nutrition



Ammonium sulfate also contains sulfur (16%), an important nutrient for groundnut crop.



Module V

Groundnut Nutrition

Your are right.

Nitrogen fixation occurs in groundnut due to its association with a type of bacteria called Rhizobium.



Module V

Groundnut Nutrition



Nitrogen fixation occurs in groundnut due to its association with a type of bacteria called Rhizobium.



Module V

Groundnut Nutrition

Your are right.

Nitrogen fixation takes place in groundnut plants in nodules attached to roots.



Module V

Groundnut Nutrition



Nitrogen fixation takes place in groundnut plants in nodules attached to roots.



Module V

Groundnut Nutrition

You are right.

Examine the roots and nodules. Active nitrogen fixation is indicated by big nodules concentrated on the tap root and the top lateral roots. Also, effective nodules will be big and are pink to dark red inside.



Module V

Groundnut Nutrition



Examine the roots and nodules. Active nitrogen fixation is indicated by big nodules concentrated on the tap root and the top lateral roots. Also, effective nodules will be big and are pink to dark red inside.



Module V

Groundnut Nutrition

You are right.

Super phosphate is the best source of phosphorus as it also contains calcium (19.5%), sulphur (12.5%) in addition to phosphorus (16%). Super phosphate also contains zinc and magnesium in traces.



Module V

Groundnut Nutrition



Super phosphate is the best source of phosphorus as it also contains calcium (19.5%), sulphur (12.5%) in addition to phosphorus (16%). Super phosphate also contains zinc and magnesium in traces.



Module V

Groundnut Nutrition

You are right.

The need to apply potassium to groundnut depends on its availability in the soil. So, soil testing information is required for taking the decision.

If the soil test reveals that the available potassium is less than 150 kg of K2O/ha, then there is a need to apply potassium in that field.



Module V

Groundnut Nutrition







Module V

Groundnut Nutrition

If you are not sure, here is the answer:





Module V

Groundnut Nutrition

You are right.

Gypsum which is calcium sulfate is a good source of calcium.

Gypsum application is recommended to supply calcium to groundnut crop.



Module V

Groundnut Nutrition


Sulfur and Ammonium sulfate do not supply calcium.Acid lime is a citrus fruit which we commonly call as lime.


Gypsum which is calcium sulfate is a good source of calcium.

Gypsum application is recommended to supply calcium to groundnut crop.



Module V

Groundnut Nutrition

You are right.

Calcium is applied at peak flowering stage i.e. 40 days after sowing.



Module V

Groundnut Nutrition


Please review the lesson on calcium application for groundnut.


Calcium is applied at peak flowering stage i.e. 40 days after sowing.



Module V

Groundnut Nutrition

You are right.

Application of 250 to 500 kg/ha of gypsum is recommended to groundnut crop.



Module V

Groundnut Nutrition


These rates of gypsum are not sufficient.


Application of 250 to 500 kg/ha of gypsum is recommended to groundnut crop.



Module V

Groundnut Nutrition

You are right.

Sulfur application to groundnut crop improves its oil content.



Module V

Groundnut Nutrition



Sulfur application to groundnut crop improves its oil content.



Module V

Groundnut Nutrition

You are right.

Continued use of common fertilizers which do not contain micronutrients has lead to micronutrient deficiencies in groundnut crop.



Module V

Groundnut Nutrition

Your answer is partially correct. But,


Continued use of common fertilizers which do not contain micronutrients has lead to micronutrient deficiencies in groundnut crop.



Module V

Groundnut Nutrition

You are right.

Zinc is the most frequently deficient in groundnut growing areas.



Module V

Groundnut Nutrition



Zinc is the most frequently deficient in groundnut growing areas.



Module V

Groundnut Nutrition

You are right.

Boron improves good kernel development in groundnut.



Module V

Groundnut Nutrition



Boron improves good kernel development in groundnut.



Module V

Groundnut Nutrition

You are right.

Soil test report gives information on the available nutrient content in soils and also the fertilizer recommendations for a given targeted yield.



Module V

Groundnut Nutrition

Your answer is partially correct. But,


Soil test report gives information on the available nutrient content in soils and also the fertilizer recommendations for a given targeted yield.



Module V

Groundnut Nutrition

You are right.

Improper incorporation of partially decomposed organic manures to groundnut crop results in problems of germination and seedling diseases.



Module V

Groundnut Nutrition



Improper incorporation of partially decomposed organic manures to groundnut crop results in problems of germination and seedling diseases.

virtual academy for the semi arid tropics course on groundnut production practices module v...

Documents

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nitrogen fixation

nitrogen application

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