Soil一vegetable transfer factors for radioiodine were measured by γ spectrom-etry as well as by total β counts method after￣(131)I solution was added to soil surface。The values of transfer factor with various migration periods and concentrations of￣(131)Iin soil and with various growth periods of vegetables are determined.The frequencydistributions and the variability of transfer factors are presented. From experimental da-ta measured with γ spectrometry

it is shown that the range of observed values is 1.28×10￣(-2)～2. 10×10￣(-1) and the geometric mean and geometric standard deviation are 5.05×10￣(-2)and 1. 96 respectively. Furthermore

it is observed that the values of transferfactors vary with the mass of vegetable and the temprerature and relative humidity in various seasons.