Summary
The intensity of nitrogen deficiency in the young wheat plant was measured over a range of 1 to 83 per cent of nitrogen stress. Within these limits of tress relative growth rate of tops fell from 11 to 2 per cent per day.
Symptoms of nitrogen deficiency appeared when the stress was greater than 40 per cent.
Nitrogen stress in the variety Gabo is calibrated in terms of the concentrations of total nitrogen, soluble nitrogen and free ninhydrin nitrogen of the youngest fully expanded leaf.
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References
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Greenwood, E.A.N. Nitrogen stress in wheat — Its measurement and relation to leaf nitrogen. Plant Soil 24, 279–288 (1966). https://doi.org/10.1007/BF02232904
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DOI: https://doi.org/10.1007/BF02232904