Fertiliser Technology
Ammonium nitrate (a fertiliser) is coated with limestone powder to

Add extra nutrient as fertiliser
Avoid the risk of explosion
Cut down its production cost
Increase its nitrogen content

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Fertiliser Technology
I argest capacity nitrogenous fertiliser plants (2700 tons of NH₃ per day) (2 Nos) in India are located at

Thal-Vaishet (under RCF in Maharashtra) and Hazira (under IFFCO in Gujarat)
Talchar (Orissa) and Ramagundam (A.P.) both under FCI
Korba (M.P.) and Talchar (Orissa) both under FCI
Haldia (W.B) and Namrup (Assam) both under HFC

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