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The measurement of pF in soil by freezing-point

Published online by Cambridge University Press:  27 March 2009

R. K. Schofield  and
J. V. Botelho da Costa
R. K. Schofield
Affiliation:
Soil Physics Department, Rothamsted Experimental Station, Harpenden, Herts
J. V. Botelho da Costa
Affiliation:
Soil Physics Department, Rothamsted Experimental Station, Harpenden, Herts
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Extract

Two procedures are described for ascertaining the relationship between the freezing-point and moisture content of a soil. Since the soil sample is dried in the process of freezing, it is necessary to estimate how much water has been frozen out of the soil at the moment when the freezing temperature is recorded.

Procedure A embodies all the precautions which appear desirable when the greatest accuracy is required. Procedure B is simple and rapid and yet accurate enough for routine estimations.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 28 , Issue 4 , October 1938 , pp. 644 - 653
Copyright
Copyright © Cambridge University Press 1938

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References

REFERENCES

Bouyoucos, G. J. (1936). J. Amer. Soc. Agron. 28, 581.Google Scholar
Bouyoucos, G. J. & McCool, M. M. (1915). Tech. Bull. Mich, agric. Exp. Sta. 24, 592.Google Scholar
Bouyoucos, G. J.(1916). Tech. Bull. Mich, agric. Exp. Sta. 31, 558.Google Scholar
Hoagland, D. R. (1918). J. agric. Res. 12, 369.Google Scholar
Keen, B. A. (1919). J. agric. Sci. 9, 400.CrossRefGoogle Scholar
Parker, F. W. (1921 a). J. Amer. chem. Soc. 43, 1011.Google Scholar
Parker, F. W. (1921 b). Soil Sci. 12, 209.Google Scholar
Parker, F. W. (1922). Soil Sci. 13, 43.Google Scholar
Schofield, R. K. (1935). Trans. Third Congr. Int. Soc. Soil Sci. 2, 37.Google Scholar
Schofield, R. K. & Botelho Da Costa, J. V. (1935). Trans. Third Congr. Int. Soc. Soil Sci. 1, 6.Google Scholar