Improvement in Food Resources-Important Questions

1.  Do organisms need food?

2.  Why?

3.  What does food provide?

4.  Do you know what are the major sources of food?

5.  Name the organism used in the preparation of vermicompost.

6.  Name two fertilisers supplying N, P, K to crops.

7.  What are the factors on which irrigation requirements depend?

8.  What are the various irrigation systems adopted in India?

9.  Give any two differences between micro and macro nutrients.

10.  What is hybridisation in plants? Mention any two desired characters for which it is done.

11.  How does the use of fertilisers improve crop production?

12.  Though fertilisers increase crop production, they are to be used in limited amount. Why?