Effects of Soil and Crop Management Practices on the Removal of Strontium-90 by Plant Uptake, Leaching, Runoff and Erosion
1969
Haghiri, F.
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.
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