Spraying of Crops with Selenium

A frame experiment was carried out in 1983 to test the effect of foliar application of selenate and selenite and the effect of simultaneous addition of a micronutrient solution on the Se concentration of barley and potatoes. In general, selenate was the more effective; however, both forms of Se proved efficient in raising the Se content of the plants from deficient to desirable levels by spraying about 5 g Se/ha. More than 50 g Se/ha might cause too high levels and should be avoided.