In: Plant nutrition : physiology and applications : proceedings of the eleventh international plant nutrition colloquium, 30 July - 4 August 1989, Wageningen, The Netherlands / van Beusichem, M.L., Dordrecht : Kluwer - ISBN 9780792307402 - p. 313 - 316.
The effect of accumulation of cadmium in the topsoil on cadmium contents in crops is evaluated for field scale situations, using a model that links cadmium input, plant uptake, and leaching to cadmium accumulation in the rootzone. Measurements of pH and organic matter content, which regulate sorption behaviour to a large extent, show significant field-scale variability. Taking this heterogeneity into account, the probability that the cadmium concentration in part of the plants exceeds quality standards is compared with exceedance of the distribution average.
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