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Synopsis: Plant nutrient losses in the percolates from monolith lysimeters over the period 1940–1955 were analyzed for variables of soil type, farming practice and amounts of percolate. Under permanent grass the depth of rooting was associated with percolation amounts while farming practice governed the amount of nutrient losses. Under rotation crops the tighter Keene soils showed greater nutrient losses than the more permeable Muskingum soils. Nutrient losses under different farming practice showed a mixed response.
2 Soil Scientist and Analytical Statistician, respectively. Grateful acknowledgment is made to William W. Bentz and Robert E. Youker, Agricultural Aids, for valuable assistance in compiling the lysimeter records.
Received for publication March 4, 1957.
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