State whether the following statements are True (T) or False (F):

1. Damaged seeds sink in water.
2. Some bacteria can convert nitrate salts in the soil to free nitrogen.
3. All crops require the same amount of water at the same time periods for their growth.
4. Crop rotation increases soil fertility.
5. Groundnut is a leguminous crop.
6. Paddy is grown first in a small area called a nursery.
7. Plough is used to remove weeds.
8. Sprinkler system of irrigation is a wasteful method.

Short Answer Questions Type-I (Answer in one or two sentences):

1. What enables leguminous plants to fix nitrogen?
2. What is animal husbandry?
3. What is pisciculture?
4. Drip irrigation saves wastage of water; why is this practice not used by all farmers?
5. You should wash fruits and vegetables thoroughly before eating. Why?
6. Why is it necessary to loosen the soil by ploughing before sowing seeds?

Short Answer Questions Type-II (Answer in about 30-40 words):

1. List the steps in order of crop production.
2. Why is it important to sow seeds at a correct depth and distance?
3. Differentiate between manures and fertilizers.
4. Explain the various methods of weeding.
5. Explain how soil gets affected by the continuous plantation of crops in a field.
6. Distinguish between threshing and winnowing.
7. What is the significance of growing wheat and gram crops together?

Long Answer Questions (Answer in about 60-70 words):

1. What is transplantation? Name one crop and one vegetable in which this practice is done. State a few advantages of this practice.
2. Draw a labeled diagram to illustrate the nitrogen cycle.
3. Describe various food products that we get from animals.

Write a paragraph on each of the following:

(i) Storage of grains
(ii) Sowing of seeds
(iii) Weeding

Higher Order Thinking Skills Based Questions:

1. Why can paddy not be grown in the winter season?
2. Do weedicides and pesticides have any effect on the health of the person handling the spraying machines of these chemicals? Explain.
3. After harvesting, should stubs be left in the field or burnt? Explain with reasons.
4. Do you find fully-grown crop plants in a nursery? Why or why not?
5. Why do farmers normally use a mixture of manures and fertilizers in their fields?