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Published in Soil Sci Soc Am J 28:167-172 (1964)
© 1964 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Linear Equations for the Simultaneous Flow of Matter and Energy in a Continuous Soil System1

Sterling A. Taylor2 and John W. Cary3

ABSTRACT

Some transfer processes in soil are considered with respect to recent developments in the theory of thermodynamics of irreversible processes. The theory provides a general and systematic guide for setting up interrelated equations describing the transport of one or more components through soil. Darcy's law and the "diffusion equation" are shown to be components of this general development. Particular attention is given to the non-isothermal flow of moisture and energy through soil. A general relation between the fluxes induced by the combined gradients of moisture content, temperature, and solutes is also suggested.

NOTES

1 Contribution from the Utah Agr. Exp. Sta. and the Soil and Water Conservation Research Division, ARS, USDA, Logan, Utah. Approved by the Director, Utah Agr. Exp. Sta. as Journal Paper 269. Presented before Div. S-1, Soil Science Society of America Cornell University, Aug. 1962.

2 Prof. of Agronomy (Soil Physics), Utah State University. This work was done in part while on sabbatical leave studying as a National Science Foundation Senior Post Doctoral Fellow with Prof. I. Prigogine at Universite Libre de Bruxelles, Belgium.

3 Research Soil Scientist, Soil and Water Conservation Research Service, ARS, USDA, at the Dept. of Irrigation, University of California, Davis.

Received for publication July 15, 1963. Accepted for publication July 22, 1963.






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