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Sewage sludge contains an average NPK content of
Question

Sewage sludge contains an average NPK content of

A.

2–3% N, 1% P₂O₅, 1% K₂O

B.

2–4% N, 2% P₂O₅, 1% K₂O

C.

3–6% N, 2% P₂O₅, 1% K₂O

D.

3–6% N, 2% P₂O₅, 2% K₂O

E.

Answer not known

Correct option is C

Sewage sludge is rich in nitrogen.
N content ranges from 3–6%.
Phosphorus is around 2%.
Potassium content is low.
Used as organic manure after treatment.
Excess K is not present.
Thus, option (c) is correct.

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