THE CONCENTRATION RATIOS PLANT TO SOIL FOR THE STABLE ELEMENTS CS, RBAND K

Cs, Rb and K have been determined in needles of Norway spruce (Picea a bies) growing on nine different sites and in the respective soils. The se values were used to calculate the concentration ratio (CR) plant/so il. CR(K) was found to be almost constant at the various sites, but CR (Rb) and especially CR(Cs) show large variations. Most sites show the order CR(Cs) < CR(Rb) < CR(K). These results make it highly probable t hat the adsorption property of the soil is responsible for the differe nces in the uptake between elements and between sites. The same soil p roperty must also be the main reason for the different Ph and Cs conce ntrations observed in various other conifers.