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Published in Soil Sci Soc Am J 32:430-432 (1968)
© 1968 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Soil Erosion in Relation to Properties of Eastern and Western Washington Forest Soils1

A. N. Balci2

ABSTRACT

Soil was sampled under Douglas-fir stands (Pseudotsuga meanziesii) located on similar parent materials in eastern and western Washington. Simulated rainfall applied to soil blocks showed real differences in erodibility of east- and west-side soils. All soil properties tested, except texture, differed significantly between the two locations.

Over 70% of the variation in soil erodibility was accounted for by a multiple regression equation using erodibility as the dependent variable and loss on ignition, permanent wilting percent, and percent silt as independent variables. Differences in soil properties were attributed to influences of climate on production of plant litter and ensuing decomposition and incorporation of litter in soil by organisms.

NOTES

1 Presented before Div. S-7 Soil Science Society of America, Nov. 1963, at Denver, Colorado. The author acknowledges financial assistance of the Pacific Northwest Forest & Range Exp. Sta., FS, USDA, Portland, Ore., and College of Forestry, Univ. of Wash., Seattle. The author thanks Drs. D. D. Wooldridge of Forest Hydrology Laboratory, Wenatchee and S. P. Gessel of University of Washington for their kind assistance in providing the facilities of their institutions and reviewing the manuscript.

2 Research associate, Univ. of Wash., Seattle; presently Assistant Professor, University of Istanbul, Turkey.

Received for publication November 4, 1966. Accepted for publication February 6, 1968.






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Copyright © 1968 by the Soil Science Society of America.