SSSAJ Journal of Natural Resources and Life Sciences Education
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Published in Soil Sci Soc Am J 32:765-770 (1968)
© 1968 Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Influence of Soil Structure on Water Relations in Low Humic Latosols: I. Water Retention1

M. L. Sharma and G. Uehara2

ABSTRACT

Experiments were carried out to study the effect of two aspects of soil structure, macrofabric and microfabric, on the water retention characteristics of two latosolic soils. The soils were selected because of similarity in composition but differences in structure.

Moisture retention curves of the soils and also of their water stable aggregates were obtained. On the basis of results it was concluded that for strongly structured soils, water retention was greatly influenced by macrofabric in the tension range between 0 to 0.3 bar, while the effect of microfabric was more prominent beyond this range. The influence of microfabric was also demonstrated by applying the surface tension, radius of curvature, pressure relationship on selected aggregate fractions.

NOTES

1 Part of a dissertation submitted by the senior author in partial requirement of the Doctor of Philosophy degree at the University of Hawaii. Presented by the senior author before Div. S-1, Soil Science Society of America, Washington, D.C., November 1967. Published with the approval of the director, Hawaii Agr. Exp. Sta. as Technical Paper 882.

2 Assistant Soil Physicist, Water Resources Research Center; and Associate Soil Scientist, Department of Agronomy and Soils, University of Hawaii, respectively.

Received for publication November 22, 1967. Accepted for publication August 27, 1968.






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