Hostname: page-component-78c5997874-4rdpn Total loading time: 0 Render date: 2024-11-03T05:18:55.079Z Has data issue: false hasContentIssue false
  • English
  • Français

An attempted fractionation of the soil phosphorus

Published online by Cambridge University Press:  27 March 2009

L. A. Dean
L. A. Dean
Affiliation:
Chemistry Department, Rothamsted Experimental Station, Harpenden
Get access Rights & Permissions [Opens in a new window]

Extract

1. Extractions of soils with sodium hydroxide, followed by an acid, have been used in an attempt to fractionate the soil phosphorus.

2. Colorimetric methods for the estimation of the organic and inorganic phosphorus in alkali soil extracts have been suggested.

3. The amount of soil phosphorus soluble in sodium hydroxide is affected by the active soil calcium. It is suggested that sodium-saturated soils be used when studying the alkali-soluble phosphorus.

4. The acid-soluble phosphorus remaining in soil after extraction with sodium hydroxide was determined. This fraction appears by analogy to be similar to the apatites.

5. The largest fraction of the total soil phosphorus was not dissolved by the sodium hydroxide and acid extractions. This fraction was not increased by the long-continued use of phosphatic fertilizers at Rothamsted and Woburn.

6. Relatively large amounts of organic phosphorus were found in soils and the amounts were closely related to the carbon contents.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 28 , Issue 2 , April 1938 , pp. 234 - 246
Copyright
Copyright © Cambridge University Press 1938

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Auten, J. T. (1923). Soil Sci. 16, 281Google Scholar
Das, S. (1930). Soil Sci. 30, 33.Google Scholar
Hockensmith, R. D. et al. (1933). Tech. Bull. Colo, agric. Exp. Sta. 2.Google Scholar
Kuhn, S. (1930). Z. PfiErnähr. Düng. 18A, 309.Google Scholar
Marshall, C. E. (1935). J. Soc. chem. Ind., Lond., 54, 393.Google Scholar
Russell, E. J. (1932). Soil Conditions and Plant Growth, p. 477. London.Google Scholar
Shorey, E. C. (1913). Bull. U.S. Div. Soils, 88.Google Scholar
Truog, E. (1930). J. Amer. Soc. Agron. 22, 874.Google Scholar
Truog, E. & Meyer, A. H. (1929). Industr. Engng Chem. Anal. ed. 1, 136.Google Scholar
Walkley, A. (1935). J. agric. Sci. 25, 598.Google Scholar