Q-11 Figure below shows the two crop fields (Plot A and Plot 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 the plot B show sudden increases and then gradual decrease in yield?
(ii)Why is the highest peak in a plot A graph slightly delayed?
(iii)What is the reason for the different pattern of the two graphs?
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(i) because chemical will increase the yield for some years but it will destroy the fertility of soil
(ii) because manure Will increase the yield and it also increase the fertility of soil
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