Question

What is compost and green manure?? Give some examples of fertilizers except NPK..

Answer 1

compost is a manure which is made from waste material such as livestock excreta, vegetable waste, animal refuse,etc. this is rich in organic matter and nutrients. while green manure is prior to the sowing of the crop seeds, some plants like sunhemp are grown and then mulched by ploughing them into soil and thus these green plants turn into green manure which enrich the soil in nitrogen and phosphorus. 
examples of fertilizers-
1. nitrosol and african violet food.
2. potassic fertilizers
3. phosphatic fertilizers