The deficient level of N (%) in plants suggested by various workers is____________________?
Correct answer: B. 3%
- A. 0%
- B. 3%
- C. 5%
- D. 10%
Explanation
Plant nitrogen concentrations below about 3% of dry matter are commonly taken as deficient, although the critical value varies with crop and growth stage. The higher values listed are generally adequate or excessive rather than deficient.
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