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.
|Title of host publication||Plant nutrition : physiology and applications : proceedings of the eleventh international plant nutrition colloquium, 30 July - 4 August 1989, Wageningen, The Netherlands|
|Editors||M.L. van Beusichem|
|Place of Publication||Dordrecht|
|Publication status||Published - 1990|
- crop quality
- heavy metals
- soil heterogeneity