Compare the use of manure and fertilizes in maintainig soil fertility.

Solution:
Manures increase soil fertility by enriching the soil with organic matter and nutrients as it isn prepared by the decomposition of animal excreta and plant wastes. On the other hand, fertilizers are mostly inorganic compounds whose excessive use is harmful to the symbiotic micro-organisms living in soil. Their excessive use also reduces soil fertility. Hence, fertilizers are considered good for only short term use.