Fertiliser Technology
Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in

Non-spherical prills
Low bulk density product
Biuret formation
Substantially wet non-flowing and sticky product

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

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

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