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Studies on Soil Phyics.

Published online by Cambridge University Press:  27 March 2009

W. Heber Green
Lecturer and Demonstrator in Chemistry, University of Melbourne
G. A. Ampt
Victorian Government Research Scholar.


§ 34. 1. The permeability and capillarity constants of soil have been defined.

2. The movements of air and water through three types of soil have been measured and shewn to conform to equations connecting the rate of motion with the above constants.

3. It is suggested that the measurement of S, Pα, Pω and K is of more importance than, and should replace, the determination of the sizes of the soil particles as in the usual “mechanical analysis” of soils.

In conclusion, we have to acknowledge our indebtedness to Professors T. R. Lyle and R. J. A. Barnard for valuable advice and suggestions and to the Victorian Government for financial assistance towards the expenses of this research.

Research Article
Copyright © Cambridge University Press 1911

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Page 2 note 1 Iowa Agric., Expt. Station, U.S.A., Bul. 94, 1908.Google Scholar

Page 6 note 1 XVth Ann. Rep. Wise. Agr. Expt. Station, p. 123.Google Scholar

Page 6 note 2 U.S.A. Bureau of Soils, Buls. 10, 19, 30, 38, etc.Google Scholar

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Page 9 note 1 Hilgard, , Soils, p. 205.Google Scholar

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Page 20 note 1 Recently some experiments have been carried out on tubes kept in a draught-cupboard whose temperature was maintained at 20° by means of a gas burner and thermostat. The values obtained for shewed the expected improvement.