Fertiliser Technology
Heating of coke, sand & phosphate rock in an electric furnace is done for the manufacture of

Phosphorous
Triple superphosphate
Phosphoric acid
Superphosphate

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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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