Allowable disposable rate of application of sludge on land is determin

1.	Allowable disposable rate of application of sludge on land is determined by:-
A.	Carbon content of sludge
B.	Potassium content of sludge
C.	Nitrogen content of sludge
D.	Phosphorous content of sludge
Answer» D. Phosphorous content of sludge

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Allowable disposable rate of application of sludge on land is determined by:-

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