Nitrogen uptake and chlorophyll meter measurements in Spring Wheat
- Cite this article as:
- Vidal, I., Longeri, L. & Hétier, J.M. Nutrient Cycling in Agroecosystems (1999) 55: 1. doi:10.1023/A:1009843813004
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A Spring Wheat crop was grown using three irrigation levels and nitrogen rate applications to evaluate chlorophyll meter measurements as a possible nitrogen nutrition index for modelling. These measurements yielded the most reliable indications at Zadoks GS45. The lower limit indicating severe nitrogen deficiency in the leaves was approximately 35 SPAD units while the upper limit of 45 SPAD units, indicated an excess consumption.