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Question

__________ is the most suitable fertiliser for paddy.

A
Urea
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B
Superphosphate
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C
Ammonium sulphate
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D
Potassium nitrate
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Solution

The correct option is C Ammonium sulphate
Growers apply ammonium sulfate primarily where they need supplemental N and S to meet the nutritional requirement of growing plants. Since, ammonium sulfate contains only 21 percent N, other fertilizer sources are more concentrated and economical to transport, often making them a better choice for N-deficient fields. However, ammonium sulfate provides an excellent source of S, which supports or drives numerous essential plant functions, including protein synthesis.
Because the N fraction is present in the ammonium form of ammonium sulfate, rice farmers frequently apply it to flooded soils, since nitrate-based fertilizers are a poor choice due to denitrification losses.

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