Distributions of238U and226Ra in agricultural samples and cultivated soils have been studied over ten years. The crops are rice, spinach and Chinese cabbage. Two investigated areas have been selected (35° 18 N, 113° 35 E). The agricultural samples and soils were collected annually from May 1982 through October 1991. The activity concentrations of226Ra in agricultural samples are greater than those of238U. The transfer factors of238U,226Ra are from 0.06·10–3 to 1.2·10–3. The226Ra/238U ratios for three agricultural samples have their characteristic values.