Abstract
Sulphur, selenium and nitrogen metabolism were studied in Merino wethers fed for 35-day periods on semi purified diets in which the sulphur content was increased to either 0·07 or 0·20 % by the addition of sodium sulphate. At both levels of sulphur, additions of selenium as DL"selenomethionine increased the basal level of selenium (0· 02Ilg/g) to 0·06, 0·09 and 0·67 Ilg/g.