Selenium Content of Field Crops Grown on Selenite-Treated Soils
1973
Cary, E. E. | Allaway, W. H.
Experiments were conducted to determine the potential for using soil application of Se to prevent Se deficiency in livestock and to determine how long a single application of Se might be effective. Sodium selenite was added to soil at rates of 2.24 and 4.48 kg/ha of Se in five different fields. The fields were cropped to corn (Zea mays L.), oats (Avena sativa L.), and/or various forage crops for 4 years following application. Selenium concentrations in the crops over the 4 years were usually maintained at levels (>0.1 ppm Se) that would have protected animals that consumed these crops from Se-deficiency diseases. The highest Se concentrations were below generally accepted limits for acute Se toxicity. Plant analysis appears to be more useful than soil analysis for monitoring this practice.
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