Question

Compare the use of manures and fertilizers in maintaining soil fertility.

Answer 1

Manure	Fertiliser
It is a natural substance that is obtained by the decomposition of animal wastes (gobar) and plant residues.	It is a man-made substance. It is an inorganic salt or an organic compound.
It adds organic matter in the form of humus to the soil.	It adds minerals to the soil.
It is insoluble in water and nutrients exist locked inside the organic compounds of humus. Hence, nutrients present in manure are absorbed slowly by the crop plants.	It is soluble in water and hence it's readily absorbed by the crop plants.