Effect of Subsurface Drainage in the Lower Mississippi Valley on Surface Water Qualityby R. L. Bengtson, Louisiana State Univ, Baton Rouge, LA, USA,
C. E. Carter, Louisiana State Univ, Baton Rouge, LA, USA,
H. F. Morris, Louisiana State Univ, Baton Rouge, LA, USA,
S. A. Bartkiewicz, Louisiana State Univ, Baton Rouge, LA, USA,
Abstract: Sediment and nutrient losses were measured from a subsurface drainage-runoff-erosion experiment for the years 1981 to 1984. The experiment, located near Baton Rouge, Louisiana, consisted of four surface drained plots, two of which were also subsurface drained. The plots were uniformly graded to a 0. 1% slope and contained a clay loam alluvial soil. Subsurface drainage reduced surface runoff by 33%, soil loss by 21%, nitrogen loss by 23%, phosphorus loss by 33%, and potassium loss by 29%.
Subject Headings: Subsurface drainage | Water quality | Surface water | Soil water | Soil loss | Clays | Nutrients | Rain water | Runoff | Mississippi | North America | Louisiana | United States | Baton Rouge
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