Paddy soil was examined in the prefecture in Koriyama, Fukushima Daiichi nuclear power plant accident, it has penetrated to a depth of approximately 15 cm part of the radiocesium in the Agricultural Research Center of Tokyo and Fukushima found. Date journals 15 "radioisotope source," to announce.
Examined in late May. 88% of cesium 134 and 137 cm depths up to three radioactive, and 96% remained the same up to 5 cm, was detected in trace amounts at 15 cm depth.
In addition, the speed where the water which cesium dissolved in was deep was thought about with around a one-1000th ratio, but actually was faster than around a one-tenth ratio far above expectations.