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Studies on Soil Physics: Part II — The Permeability of an Ideal Soil to Air and Water

Published online by Cambridge University Press:  27 March 2009

Heber Green  and
G. A. Ampt
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Extract

§ 1. In Part I. (vol. IV. pp. 1—24) it was shown that the intrinsic permeability of a soil when measured with water was less than when measured with air as the experimental fluid, and that the ratio of the two values varied with the amount of colloidal matter present. It was desirable to determine accurately whether the values would be identical for soils composed of pure sand or other uniform and non-colloidal particles.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 5 , Issue 1 , October 1912 , pp. 1 - 26
Copyright
Copyright © Cambridge University Press 1912

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References

page 6 note 1 We are indebted to Mr Radcliff of the Bairnsdale School of Mines for suggesting this shape of elutriating tube.

page 8 note 1 See Vol. IV. p. 3, § 6

page 27 note 1 It was pointed out in Part I. of these researches (loc. cit. §§ 9, 32) that the behaviour with water is a most important property of the soil; for whereas with clean sands the ratio will be but slightly greater than unity, the amount of colloidal matter present will cause a corresponding increase in its magnitude.