Refer to the given graph representing two crop fields X and Y that have been treated by different types of materials for nutrient replenishment, keeping other environmental factors same.
Select the incorrect statements regarding these crop fields X and Y.

Options

A. Materials used for treating crop field X could be organic substances while those used for Y could be inorganic substances.
B. Materials used for crop field X are nutrient specific while those used for crop field Y arc not nutrient specific.
C. Gradual decline in yield of crop field Y is due to killing of useful soil microbes.
D. Persistent yield of crop field Xis due to replenishment of nutrients by gradual decomposition of organic matter.

Answer

B

Explanation

In the given graph, crop field X is treated by manure and crop field Y is treated by chemical fertiliser. Manures are not nutrient specific but are rich in organic nutrients like humus and thus replenish the soil over a long period of time. Chemical fertilisers are nutrient specific and make soil fertile instantly but do not replenish the soil nutrients persistently over a long duration.