Abstract
The major difficulty in the direct use of the nitrogen nutrition index (NNI) as an indicator of crop N status at the farm level is the need to determine the actual crop mass to calculate the NNI value. As shown in Chapter 2, the NNI can be a valuable reference tool for experimental conditions where the determination of crop mass can be easily made, but it cannot be considered as an operational tool for crop diagnosis. It therefore seems necessary to determine effective and simple procedures for the diagnosis of crop N status which do not require a determination of crop mass, but which are closely related to the NNI of the crop.
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© 1997 Springer-Verlag Berlin Heidelberg
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Lemaire, G., Plénet, D., Grindlay, D. (1997). Leaf N Content as an Indicator of Crop N Nutrition Status. In: Lemaire, G. (eds) Diagnosis of the Nitrogen Status in Crops. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60684-7_11
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DOI: https://doi.org/10.1007/978-3-642-60684-7_11
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