Fertiliser Technology
Urea is a better fertilizer than ammonium sulphate, because

It is not poisonous
It is cheaper
It is easy to manufacture
Nitrogen content is higher

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Fertiliser Technology
Nitrogenous fertiliser is required

None of these
During the early stage of growth to promote development of stem and leaves
For accelerating fruit formation in later stage of growth
To lessen the effect of excessive potash application

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