Hostname: page-component-848d4c4894-4rdrl Total loading time: 0 Render date: 2024-06-16T02:40:01.905Z Has data issue: false hasContentIssue false
  • English
  • Français

The rapid determination of available phosphate in soil by the coeruleo-molybdate reaction of Denigès

Published online by Cambridge University Press:  27 March 2009

W. R. G. Atkins
W. R. G. Atkins
Affiliation:
Marine Biological Laboratory, Plymouth.
Get access Rights & Permissions [Opens in a new window]

Extract

1. The coeruleo-molybdate method of Denigès affords a rapid means of estimating phosphates in such dilute solutions as are given by aqueous extracts of soils, 1:5, even when the extract is diluted twenty-fold.

2. High phosphate values were found for bog peats, but the majority of the soils studied gave to the extract phosphate corresponding to under two parts per million of phosphorus pentoxide. Dunged soil gave 20 p.p.m. or more.

3. Extraction for 3–4 hours gives values as high as extraction for 4–7 days with ordinary soils of low phosphate content, but the phosphate of richer soils may undergo a reversion to an insoluble form during prolonged extraction.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 14 , Issue 2 , April 1924 , pp. 192 - 197
Copyright
Copyright © Cambridge University Press 1924

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

Arrhentus, O. (1922). Hydrogen ion concentration, soil properties and growth of higher plants. Arkiv för Botanik, 18, 1–54.Google Scholar
Atkins, W. R. G. (1923). The phosphate content of fresh and salt waters in its relationship to the growth of the algal plankton. Journ. Marine Biol. Assoc. 13, No. 1.CrossRefGoogle Scholar
Burd, J. S. (1918). Water extraction of soils as criteria of their crop-producing power. Journ. Agric. Res. 12, 297–309.Google Scholar
Burd, J. S. and Martin, J. C. (1923). Water displacement of soils and the soil solution. Journ. Agric. Sci. 13, 265–95.CrossRefGoogle Scholar
Denigès, G.Détermination quantitative des plus faibles quantités de phosphate dansles produits biologiques par la méthode cèrutèo-molybdique. Compt. Rend. Soc. Biol. (Paris), 84, No. 17, 875–77 and C. R. Acad. des Sc. 1920, 171, 802.Google Scholar
Florentin, D. (1921). Détermination de phosphate dans l'eau. Ann. Chim. Anal. Chim. Appl. 3, 295–96.Google Scholar
Hall, T. D. and Vogel, J. C. (1923). Reversion of acid phosphate in acid soils. Soil Sci. 15, 367–69.CrossRefGoogle Scholar
Hoagland, D. R., Martin, J. C. and Stewart, G. R. (1920). Relation of the soil solution to the soil extract. Journ. Agric. Res. 20, 381–95.Google Scholar
Prescott, J. A. (1914). The estimation of phosphates in soil extracts. Journ. Agric. Sci. 6, 111–20.CrossRefGoogle Scholar
Russell, E. J. and Prjsscott, J. A. (1916). The reaction between dilute acids and the phosphorus compounds of the soil. Journ. Agric. Sci. 8, 65–110.CrossRefGoogle Scholar
Shedd, O. M. (1923). Effect of adsorption and other factors on certain plant food constituents obtained in the dilute nitric acid digestion of soils and an improvement for their estimation. Soil Sci. 15, 383–93.CrossRefGoogle Scholar