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Runoff from Pasture Plots Analyzed by Fitting of Constants Technique
Author(s) -
Gard L. E.,
Jacob W. C.,
Van Doren C. A.
Publication year - 1959
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1959.03615995002300050027x
Subject(s) - surface runoff , pasture , antecedent moisture , hydrology (agriculture) , environmental science , runoff curve number , storm , erosion , meteorology , forestry , geography , geology , ecology , biology , paleontology , geotechnical engineering
Runoff data from erosion plots were analyzed by a technique known as analysis of variance by method of fitting of constants. This method permits nonorthogonal data to be handled in a reasonable fashion. Data were collected from pasture plots at the Dixon Springs Experiment Station in Pope County, Illinois, during the period 1940 to 1951. Soil treatment reduced runoff during each of the four seasonal periods. Runoff was higher from severely grazed than moderately grazed plots during the grazing season (April through September) but not during the nongrazing season (October through March). As the seasons progress from January through September more intense storms are required to cause equal runoff. Percent runoff generally increased with increases in antecedent moisture. Values obtained for the regression of runoff on amount of rainfall indicate that there are too many uncontrolled variables for ratios to be useful.