List out some useful traits in improved crop?

Fill in the blanks

(a) Pigeon pea is a good source of _______

(b) Berseem is an important ________ crop.

(c) The crops which are grown in rainy season are called ______ crops.

(d) ______ are rich in vitamins.

(e) _____ crop grows in winter season.

What is a GM crop? Name any one such crop which is grown in India.

Why is organic matter important for crop production?

Why is excess use of fertilizers detrimental for environment?