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Published in Soil Sci Soc Am J 38:661-663 (1974)
© 1974 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Effect of Effluent from Beef Feedlots on the Physical and Chemical Properties of Soil1

D. G. Hinrichs, A. P. Mazurak and N. P. Swanson2

ABSTRACT

Effluent from beef feedlots was applied as irrigation to a Colo silty clay loam soil in eastern Nebraska over a 2-year period. Atlas sorghum [Sorghum bicolor L. (Moench.)] was grown in 1971 and 1972. Weekly irrigations applied during the growing season were: no effluent or water, 2.5 cm water from creek, 5.0 cm water from creek, 2.5 cm effluent, and 5.0 cm effluent. Surface soil samples were taken just before, midway, and at the end of each irrigation season.

The effluent applications produced no statistically significant differences in soil bulk density, water-retention characteristics, or size distribution of particles and water-stable aggregates. Significant differences were measured in the hydraulic conductivities of disturbed soil samples. The effluent reduced the permeability of soil. The electrical conductivities and Na+, K+, and Cl- in the leachates obtained from hydraulic conductivity determinations for the effluent-treated plots increased during the growing season. However, leaching from winter rains essentially eliminated these increases except for K+ which was greatly reduced.

NOTES

1 Contribution from Soil, Water, and Air Sciences, North Central Region, ARS, USDA, in cooperation with the Nebraska Agr. Exp. Sta., Lincoln, Nebraska. Published as Paper no. 3687 Journal Series, Nebraska Agr. Exp. Sta. A portion of the funds for this research was provided by the Environmental Protection Agency.

2 Former Research Assistant; Professor of Agronomy, Univ. of Nebraska; and Agricultural Engineer, USDA; Lincoln, Nebraska, respectively.

Received for publication November 16, 1973. Accepted for publication January 22, 1974.






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Copyright © 1974 by the Soil Science Society of America.