Factors affecting ¹³⁷Cs concentration in wild plants and soils of different land use in Iitate village after the Fukushima nuclear power plant accident

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 Information about radioactive cesium (¹³⁷Cs) distribution on lands with different uses is necessary for future decontamination works. This study investigated the degree of contamination and factors affecting ¹³⁷Cs accumulation in soils and wild plants in areas of different land use after the Fukushima Nuclear Power accident. We measured the level of ¹³⁷Cs in soils and wild plants in Iitate village and neighboring areas in 2014. Results indicated that ¹³⁷Cs in the agricultural soils was 11-14 kBq kg^－1, while the roadside soil with a high clay content showed the highest concentration (261 kBq kg^－1) and the mountain soil with high soil organic matter showed the lowest concentration (6 kBq kg^－1). The ¹³⁷Cs concentrations in wild plants directly reflected those in their respective soils. The ¹³⁷Cs uptake in wild plants did not differ among plant species grown in the same soil but differed within the same plant species grown in different soils.