Summary
The rate of flow and nitrate and phosphorus content of the water from four drained sandy and clayey plots of size 12×60 m cropped to continuous corn were determined following two annual applications of different rates (0, 260, 390 and 520 kg N/ha) of cow manure slurry. The drain flow was directly related to the rainfall and was greatly influenced by soil texture. The N losses were greater in 1972 (7.8 to 19.1 kg N/ha) than in 1971 (0.4 to 7.8 kg N/ha) because of more summer rainfall. Nitrogen and phosphorus losses were larger from the sandy plots than from the clayey plots. The manure application rates had no apparent effect on nitrogen losses in the drain water.
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Iqbal, M.M., Warkentin, B.P. Nitrogen and phosphorus content of flow from drains fertilized with cow manure slurry. Plant Soil 63, 517–521 (1981). https://doi.org/10.1007/BF02370054
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DOI: https://doi.org/10.1007/BF02370054