Fertiliser Technology
A fertiliser plant is classified as a gas based fertiliser plant, when it uses __________ gas as a source of hydrogen for the manufacture of ammonia.

Natural
Coke oven
Producer
Coal

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Fertiliser Technology
Nitrogenous fertiliser is required

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

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