RT Journal Article
SR Electronic
T1 USLE P factors for subsurface drainage on low slopes in a hot, humid climate
JF Journal of Soil and Water Conservation
FD Soil and Water Conservation Society
SP 480
OP 482
VO 45
IS 4
A1 R. L. Bengtson
A1 G. Sabbagh
YR 1990
UL http://www.jswconline.org/content/45/4/480.abstract
AB Sediment losses were measured from a subsurface drainage-runoff-erosion experimental area near Baton Rouge, Louisiana, for the years 1981–1987. Subsurface drainage reduced soil loss 42%. An annual universal soil loss equation soil loss ratio of 0.11 for conventional tillage silage corn and an annual P value of 0.60 for subsurface drainage were calculated from the soil erosion data for this experiment. The experiment also showed that subsurface drainage is more effective in reducing soil erosion during the winter by controlling water tables caused by the cool weather and large amounts of precipitation during this season in Louisiana.