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Accurate measurement of the nitrogen (N) required for plant growth helps optimize grain yield, farm profits, and N-use efficiency. Critical nitrogen (N c ) curves have been developed to describe N dilution in plant tissues during crop growth and to estimate the N status of whole plants; however, N c curves for leaves have yet to be constructed. We constructed and validated a leaf N...
Real-time and nondestructive monitoring of crop nitrogen (N) status is of significant importance for precision N management in rice and wheat production. In eight field experiments with different N rates, water regimes and cultivars in rice and wheat crops, a new form of three-band vegetation indices was constructed to reduce saturation in two-band vegetation indices, and the optimal common three-band...
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