Tolerable Parameters of Pastures Pollution with <sup>137</sup>Cs and <sup>90</sup>Sr and Coefficients of Radionucleids Transition from Legumes into Cow Milk
<sup>90</sup>Sr transition ratio from diet based on green mass of Lucerne and foxtail clover into milk of cattle is equal to 0.14 and 0.18% correspondingly. <sup>137</sup>Cs transition ratio from diet based on green mass of Lucerne and foxtail clover into milk of cattle is equal to 0.63 and 0.78% correspondingly. To get a pure milk, the usage of Lucerne green mass with the purpose of mono-forage in summer diets of lactating cows is possible if it is cultivated on territories with radiation pollution density <sup>90</sup>Sr up to 5.55 kBk/m<sup>2</sup> (0.15 K/km<sup>2</sup>) and <sup>137</sup>Cs - 925 kBk/m<sup>2</sup> (25 K/km<sup>2</sup>). What concerns foxtail clover, the limit of radiation pollution density of forage grounds is 3.7 kBk/m<sup>2</sup> (0.1 K/km<sup>2</sup>) for <sup>90</sup>Sr and 925 kBk/m<sup>2</sup> (25 K/km<sup>2</sup>) for <sup>137</sup>Cs.