Question

tell me answers of this question​

Answer 1

Answer:

Plot B refers to chemical fertilisers which give short term because they are nutrient specific. The continuous use of fertilisers in an area destroy the soil fertility so there is gradual decrease in yield after sometime.(2) Manures help in enriching soil with nutrients and organic matter and increase the soil fertility. (3) Manures are natural ways of enriching soil whereas chemical fertilisers are commercial produced plant nutrients. They do not have organic matter like manure to replenish the soil with useful microbes. Therefore, in plot A manures give high yield while plot B gives high yield for short time and then it decreases.