Fertiliser Technology
Commercial production of hydrogen for the manufacture of nitrogeneous fertilisers is done by

Electrolysis of water
All of these
Cryogenic separation of hydrogen from coke oven gas
Steam reforming of naphtha and cracking of natural gas

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Fertiliser Technology
Potassic fertilisers

Help in development of starches of potatoes and grain
Are useful during early stage of the plant growth
None of these
Stimulate early growth and accelerate seeding

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Fertiliser Technology
Nitrogenous fertiliser is required

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

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