Fertiliser Technology
Yield of urea can be increased with excess ammonia and higher pressure & temperature, but because of __________ this is normally not done.

Increased cost of equipment
All of these
Increased biuret formation
High corrosion rate

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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
Soil becomes too acidic
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

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