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The Determination of phosphorus in soils

Published online by Cambridge University Press:  27 March 2009

W. McLean
W. McLean
Affiliation:
(University College of North Wales, Bangor)
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Extract

1. Phosphorus in hydrochloric acid extracts of soil may be conveniently determined by digestion with sulphuric and nitric acids.

2. By boiling soil with hydrochloric acid (B.P. 110° C.) for 48 hours under reflux an end-point of extraction is reached.

3. Digestion of soil with sulphuric and nitric acids gives results in agreement with results by 48 hours” hydrochloric acid extraction.

4. It is suggested that the phosphorus thus extracted represents a definite category of soil phosphorus, which may be taken as the total phosphorus present in the soil.

5. Details of the suggested method are given.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 26 , Issue 3 , July 1936 , pp. 331 - 336
Copyright
Copyright © Cambridge University Press 1936

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References

REFERENCES

(1)Hall, A. D.The Soil, p. 134.Google Scholar
(2)Commission II, Int. Soc. Soil Sci., Proc. int. Soc. Soil Sci. (1929), 4, 285.Google Scholar
(3)A.E.A. Analysis of Soils Sub-Committee. Agric. Progr. (1931), 8, 134.Google Scholar
(4)Richards, M. B. and Godden, W.Analyst, December 1924.Google Scholar
(5)Halle method in H. W. Wiley, Agricultural Analysis (1895), 1, 305.Google Scholar