| sewage sludge as a source of cadmium in soil-plant-animal systems. | the objective of this presentation is to relate the abundance and mobility of cd in components of terrestrial ecosystems with implications for land utilization of sewage sludge. the uptake of cd by crop plants is a function of the quantity of the element in the soil plus other soil factors affecting the cd ion activity or electrochemical potential at the plant root surface. the natural abundance of cd in soils has been reported as 0.5 mug/g which is higher than the background level of 0.2 mug/g ... | 1979 | 39747 |