Selenium Content of Field Crops Grown on Selenite-Treated Soils1
- E. E. Cary and
- W. H. Allaway2
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.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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