... of strontium-90 and cesium-137 in the first six inches range from 0.02 to 0.29 and from 0.5 to 2.0 microcuries per 100 grams of soil ... The uucSr-90 to 1 gram Ca* and the uucCs-137 to 1 gram K ratios in the leaves of one of the native plants (Polygonum lapathifolium L.) on ... G. Ducet ...