Fertiliser Technology
Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth?

Phosphatic fertiliser
Potassic fertiliser
None of these
Nitrogeneous fertiliser

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Fertiliser Technology
Multistage operation (as in the case of catalytic oxidation of SO₂) is not carried out for NH₃ synthesis, because of

High cost of the high pressure vessel used for the reactor
Comparatively higher pressure drop
Chances of entrainment and disturbance of catalyst bed
Higher pumping cost

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