@misc{oai:repo.qst.go.jp:00068745,
 author = {Ishikawa, Nao and Uchida, Shigeo and Tagami, Keiko and 石川 奈緒 and 内田 滋夫 and 田上 恵子},
 month = {Oct},
 note = {Radionuclide sorption onto soil is generally represented by a soil-soil solution distribution coefficient (Kd) which is defined as the relation between an adsorbed radionuclide concentration and that present in the solution. In this work, Kd values of Sr and Cs were obtained for 112 Japanese agricultural soil samples (50 paddy soil and 62 upland soil samples). Then, the relationships between Sr or Cs sorption behavior and soil properties were discussed.
The Kd values were measured using a batch sorption test. Soil properties, such as pH, electric conductivity (EC), cation exchange capacity (CEC), total carbon content, total nitrogen content, and clay content were measured as well. 
Sr-Kd values ranged from 100 to 1820 L kg-1 (geometric mean (GM) = 400 L kg-1) for paddy soil samples, and from 60 to 640 L kg-1 (GM = 220 L kg-1) for upland soil samples. Cs-Kd values ranged from 270 to 16640 L kg-1 for paddy field soil samples with a GM of 2260 L kg-1 and from 360 to 35730 L kg-1 for upland soil samples with a GM of 3900 L kg-1. Sr-Kd values differed significantly between paddy and upland soil samples in t-test (p < 0.001) High correlation was found between the Sr-Kd values and cation distribution ratios (CDR: CEC/EC) with a Spearmen rank correlation coefficient (Rs) of 0.71 (p < 0.001). Cs-Kd values differed between paddy and upland soil samples in t-test (p < 0.005). These differences for Sr- and Cs-Kd values would be attributable to the differences of soil properties. In addition, the amounts of Cs fixed in soil had high correlation with fixation ability, which was estimated using clay content, pH, and total carbon content (Rs =0.83, p < 0.001)., The 6th International Symposium on Advanced Science Research},
 title = {Distribution coefficient for 85Sr and 137Cs in Japanese agricultural soils},
 year = {2006}
}