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The measurement of electrical conductivity of aqueous soil suspension and its use in soil fertility studies1(With Five Text-figure.)

Published online by Cambridge University Press:  27 March 2009

Ashutosh Sen
Ashutosh Sen
Affiliation:
Formerly of Soil Physics Department, Rothamsted Experimental Station, Harpenden, Herts.
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Extract

Several factors affecting the electrical conductivity of soil suspensions have been studied leading to the development of a simple and rapid technique for its measurement, and suitable for both moist and air-dry soils.

The possible use of the method in soil fertility studies necessitated examination of the effects of cultivations, manures, crop, meteorological variations, etc., on the conductivity measurements. This involved periodical determinations of initial conductivity (i.e. the specific conductivity of a 1 to 5 aqueous soil suspension determined at 25° C.) and the 7 days’ increase (i.e. the rise in specific conductivity of the same aqueous suspension after standing for 7 days in a thermostat at 25° C.). Soil samples were examined from several Rothamsted classical and nonclassical plots (over twenty plots were investigated for 15–20 months), and samples from experiments were also utilised during two growing seasons.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 22 , Issue 1 , January 1932 , pp. 212 - 234
Copyright
Copyright © Cambridge University Press 1932

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