Document Type

Thesis - Open Access

Award Date

1988

Degree Name

Master of Science (MS)

Department

Agricultural Engineering

Abstract

Researchers have expressed the need to relate measurable physical parameters, such as implement draft and the cone index of a soil, to soil chemical parameters (ESP and EC) to assist in the determination of soil reclamation costs. The importance of implement draft in the reclamation of a sodic soil was examined. Field data were collected on a sodium-affected silt loam soil on July 2, 1986 and July 17, 1987. A laboratory study was conducted to investigate the water retention characteristics of the soil at various levels of exchangeable sodium percentage (ESP). The water retention curves verified the theory by Russo and Bresler that for a given soil-water suction head (h), the soil water content increases as the Na+ /Ca++ ratio (R) of the soil solution increases (or h=a*(8/9s )b). Significant linear relationships (P

Library of Congress Subject Headings

Soil, Salts in

Irrigation water -- Quality

Tillage

Soils, Irrigation

Format

application/pdf

Number of Pages

125

Publisher

South Dakota State University

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