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FACTORS CONTROLLING RUNOFF NUTRIENT LOSS FROM CULTIVATED LAND IN EASTERN SOUTH DAKOTA 1
Author(s) -
White E. M.
Publication year - 1983
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1983.tb02783.x
Subject(s) - surface runoff , environmental science , precipitation , nutrient , fertilizer , phosphorus , agronomy , hydrology (agriculture) , soil science , chemistry , geology , ecology , biology , geography , geotechnical engineering , organic chemistry , meteorology
A stepwise multiple regression was used to evaluate the relative importance of antecedent‐, event‐, and high‐intensity‐precipitation amounts; runoff volume; and precipitation nutrient contents and concentrations in determining nutrient losses in runoff. Plots were fertilized at high, medium, and low rates and had cultivation ridges oriented up‐and‐down slope or on the contour. Runoff volume was the important factor in determining the loss of NO 3 , soluble PO 4 , total PO 4 , and soluble K ions in runoff from fallow, corn, or soybean plots. NH 4 ‐N loss was controlled mainly by the precipitation content and antecedet precipitation since fertilizer had been applied. Nutrient losses were greater from plots fertilized at the high rate and from plots with cultivation ridges oriented up‐and‐down slope rather than on the contour.