Question

Figure shows the two crop fields [plots A and B] have been treated by manures and chemical

fertilizers respectively, keeping other environmental factors same.

Observe the graph and answer the following questions.

(i) Why does plot B show sudden increase and then gradual decrease in yield?

(ii) Why is the highest peak in plot A graph slightly delayed?

(iii) What is the reason for the different pattern of the two graphs?​

Answer 1

Answer:

pls provide the graph

Answer 2

Answer:

With addition of chemical fertilizers there is sudden increase in yield due to release of nutrients N, P, K etc. in high quantity which are absorbed by the roots quickly. The gradual decline in the graph may be due to continuous use and high quantity of chemicals which kill microbes useful for replenishing the organic matter in the soil. This decreases the soil fertility.