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The evaporation of water from soil: III. A critical study of the Technique

Published online by Cambridge University Press:  27 March 2009

Bernard A. Keen ,
Edward M. Crowther  and
John R. H. Coutts
Bernard A. Keen
Affiliation:
(Soil Physics Department, Rothamsted Experimental Station, Harpenden.)
Edward M. Crowther
Affiliation:
(Soil Physics Department, Rothamsted Experimental Station, Harpenden.)
John R. H. Coutts
Affiliation:
(Soil Physics Department, Rothamsted Experimental Station, Harpenden.)
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Extract

Some recent researches on the evaporation of water from soil are reviewed.

Experiments on the evaporation of water from a soil paste spread in shallow pans showed that the drying proceeded very irregularly over the soil mass. Considerable portions became almost completely dry whilst other portions remained very wet. There was a rough relationship between the form of the dry patch and the shape of the corresponding evaporation rate curves.

An improvement in technique was effected by exposing the soil in thin layers below glass plates. Under these conditions, reproducible results were obtained. Soil and kaolin, but not sand, gave considerable linear portions over the region of decreasing rate of evaporation. Tests on soil exposed as central discs, or peripheral rings, and on partially covered full plates, showed that, owing to the type of air currents set up, the drying was largely confined to the outer edges during the early stages.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 16 , Issue 1 , January 1926 , pp. 105 - 122
Copyright
Copyright © Cambridge University Press 1926

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References

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