Transfer of Fallout Cesium-137 from Soil to Dairy Cattle Feeds1
- James E. Johnson,
- Daniel W. Wilson and
- Willard L. Lindsay2
Corn (Sorghum vulgare) seedlings were grown in a greenhouse in the upper 5 cm of soil taken from a permanent pasture containing a cumulative fallout deposition of Cs137 of 80,000 pc/m2. No detectable Cs137 (< 10 pc/kg) was found in the plants. On the other hand, corn plants growing in local fields contained 1,500 pc/kg of Cs137. It was concluded from these studies that the Cs137 content of dairy cattle feeds resulted largely from direct foliar contamination, and that uptake from the soil reservoir was unimportant. Further, the comparable alfalfa hay crops in years since 1963 have been decreasing in Cs137 level, while the top soil Cs137 concentration has increased steadily during this period.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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