Nitrogen Use Efficiency, Nitrogen Fertilizers, NUE, Nitrogen and the Environment Nitrogen Fertilization Approaches
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Fertilization Approaches
Nitrogen Uptake (entire page)

https://doi.org/10.2136/sssaj1997.03615995006100040032x (last sentence, no need to estimate yield) SSSAJ, 1997,
Response index versus sufficiency
Yield results documenting Max Yield concept based on ideal plant stands

Max yield obtainable with homogenous plant stands
RI YP0 Algorithm concept showing the differences between Max Yield, RI-YPO, and RI-YPO-CV


CV, Yield

Randy Boman, 1995, Winter wheat


INSEY, CV, Yield

Trimble Pocket Sensor, Greenseeker, NDVI, nitrogen