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The Wilting Point and Available Moisture in Tropical Forest Soils of Nigeria

Published online by Cambridge University Press:  03 October 2008

A. O. Obi
A. O. Obi
Affiliation:
Department of Soil Science, University of Ife, Nigeria
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Summary

Availability of soil water was investigated and the methods of determining the lower limit of availability by biotic and standard 15-bar pressure were compared. Greenhouse-grown sunflower and okra were the test crops for the biotic method. The pressure membrane equipment was used for standard 15-bar moisture determination. Okra and sunflower took up water beyond the standard 15-bar tension, thus lowering the moisture content at moderate wilting below the generally accepted values. In topsoil okra wilted at very high tensions, but at somewhat lower tensions in subsoil samples, unlike sunflower which wilted at higher tensions in subsoil samples. An equation is given which may be used to estimate the moisture content at the moderate wilting point of plants with known wilting tensions.

Type
Research Article
Information
Experimental Agriculture , Volume 10 , Issue 4 , October 1974 , pp. 305 - 312
Copyright
Copyright © Cambridge University Press 1974

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References

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