Effects of Soil and Crop Management Practices on the Removal of Strontium-90 by Plant Uptake, Leaching, Runoff and Erosion1
- F. Haghiri2
Long-term field investigations are being conducted to study the effect of management practices on the removal of 90Sr by runoff, leaching, erosion and plant uptake. The management practices consist of one crop rotation with high and low rates of lime, permanent grass, continuous corn, and gravel mulch with no vegetation. Over a 5-year period, the 90Sr content of the soil in a 0-10-cm depth decreased in all cropping systems. The percent 90Sr loss by runoff water and sediment was negatively correlated with time while the percent 90Sr in the leachate water increased with time. The percent 90Sr removal by runoff and leachate water was maximum under gravel mulch and minimum under grass treatments. Sod crops were more effective in minimizing the 90Sr loss in runoff and leachate water than cultivated crops. High Ca accumulating crops such as alfalfa removed more 90Sr than low accumulators such as corn. High rates of lime reduced the 90Sr uptake by crops and the removal by leachate water.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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