The results from the cadmium and uranium screening in arable soils indicate that these potentially toxic metals enter agricultural areas through mineral fertilisation and can accumulate in soils. Regarding lead and arsenic, negligible amounts are introduced with mineral fertilisers. At three of six NABO sites selected for the screening, an increase in cadmium of 0.02-0.1 mg/kg per year and in uranium of 0.1-0.7 mg/kg per year was measured in the topsoil, relative to a period of two decades.
In general, the metal accumulation in intensively used agricultural areas can further increase. The measures to minimise cadmium and uranium inputs in the soil include, among others, better control of the Cd threshold values for P mineral fertilisers and the monitoring of soil water, ground water and surface water bodies.