With an increase in the supply of irrigation water, yields of the crops______.
A
Decrease continuously
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B
Increase continuously
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C
Increase up to a certain limit and becomes constant
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D
Increase upto a certain limit and then decreases
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Solution
The correct option is D Increase upto a certain limit and then decreases With the supply of irrigation water, yield of the crops increases, but abundant supply of irrigation water tempts the cultivators to use more water than required, which would raise ground water table and will lead to water logging. Excessive moisture clogs the voids and circulation of air and deficiency leads to extra pull, which retards the growth.