List any five chemical fertilizers rich in nitrogen.

What are chemical fertilizers?

Assertion : Chemical fertilizers and pesticides are not only expensive but also pose environmental hazards. Reason: Any mismanagement during application of chemical fertilizers and pesticides is likely to cause damage not only to crops but also to man.

For what purposes the chemical fertilizers are used in crop fields ?

Excessive use of chemical fertilizers reduces soil fertility in the long run .

Increasing amount of chemical fertilizers leads to

Assertion : Manures and biofertilizers shuld be used in place of chemical fertilizers. Reason : Chemical fertilizers cause pollution by releasing excess nutrients in water bodies.