Question
The sewage and sludge contains an average NPK content of (
- A 2.0 to 3.0% N. 1.0% P2 O3 and 1.0% K2 O (
- B 2.0 to 4.0% N. 2.0% P2 O3 and 1.0% K2 O (
- C 3.0 to 6.0% N. 2.0% P2 O3 and 1.0% K2 O (
- D 3.0 to 6.0% N. 2.0% P2 O3 and 2.0% K2 O (
- E None of these
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