Which one of the following is used as a nitrogenous fertiliser, as a weed killer

Question

Which one of the following is used as a nitrogenous fertiliser, as a weed killer in the onion fields and for correcting acidic soils?

Options:

A . Urea

B . CAN

C . Ammonium sulphate

D . Calcium cyanamide

Answer: Option D

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