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

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

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Fertiliser Technology
Excessive use of chemical fertilisers causes shrivelling of the roots and wilting of the plant, because the

Osmotic pressure of the soil water becomes higher than that of the plant sap
Osmotic pressure of the soil water becomes less than that of the plant sap
Soil becomes too acidic
Soil becomes too alkaline

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