Question

Why should fertilizers be substituted with manure?

Answer 1

manures r biodegradable but fertilizer r not.
manures increase fertility of soil but fertilizer decrease.
fertilizer cause soil n water pollution but manures r eco friendly.
fertilizer harm the next tropic level in food chain as well as web but manure don't affect so.

Answer 2

Explanation:

manures increase fertility of soil but fertilizer decrease. fertilizer cause soil n water pollution but manures r eco friendly. fertilizer harm the next tropic level in food chain as well as web but manure don't affect so.