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

Urea
Ammonium sulphate
Calcium cyanamide
CAN

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Fertiliser Technology
The composition of fresh feed to the high temperature, high pressure urea autoclave is

Excess liquid ammonia and compressed CO₂ gas
Excess liquid ammonia and liquefied CO₂
Compressed ammonia gas and excess compressed CO₂
Liquid ammonia and excess compressed CO₂

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