Which of these is widely used N fertilizer in rice ........

Agriculture and Rural Development (Phase-I/II) Agriculture chemistry

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Which of these is widely used N-fertilizer in rice?

Ammonium sulphate

Calcium sulphate

Urea

DAP

All of these

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Explanation:

Ammonium sulphate [(NH4)2 SO4] was one of the first and most widely used nitrogen (N) fertilizers for crop production. It’s now less common but especially valuable where both N and sulfur (S) are required. Its high solubility provides versatility for a number of agricultural applications. Ammonium sulfate (sometimes abbreviated as AS or AMS) has been produced for more than 150 years.