SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 41:1020-1022 (1977)
© 1977 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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A Quick Method for Estimating Soil Water Diffusivity Functions1

R. D. Miller and Eshel Bresler2

ABSTRACT

Published data for horizontal infiltration into air dry ({theta}d) nonsodic stable soil, imply a regression equation D({theta}) = 0.001 m2 exp [8({theta}-{theta}d)/({theta}w-{theta}d)] where the limit of wetting is {theta}w and m is a constant relating visual position, xf of wetting front at time t, m = xf/(t)1/2. If m isn't constant, D({theta}) may not exist.

NOTES

1 Contribution from Dep. of Agron., Cornell Univ., Ithaca, NY 14853; Agronomy Pap. no. 1148.

2 Professor of Soil Physics and visiting Associate Professor, respectively.

Received for publication October 14, 1975. Accepted for publication May 23, 1977.






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