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The Estimation of Phosphates in Soil Extracts

Published online by Cambridge University Press:  27 March 2009

James Arthur Prescott
James Arthur Prescott
Affiliation:
(Rothamsted Experimental Station.)
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Extract

The estimation of phosphate in soil extracts presents certain difficulties owing to the small amount usually present. Practically all the methods make use of the phospho-molybdate precipitate. Hehner's method based on the weighing of this precipitate was adopted by Dyer, and has been recently investigated by. Auld.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 6 , Issue 2 , May 1914 , pp. 111 - 120
Copyright
Copyright © Cambridge University Press 1914

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References

page 111 note 1 Journal of the Chemical Socicty, 1894, 65, 115.CrossRefGoogle Scholar

page 111 note 2 Analyst, 1912, 37, 130.CrossRefGoogle Scholar

page 111 note 3 Bulletin 107.

page 111 note 4 Journal of the American Chemical Society, 1893, 15, 382; 1894, 16, 278; 1895, 17, 178.CrossRefGoogle Scholar

page 111 note 5 Zeits. Anal. Chem. 1889, 28, 141.CrossRefGoogle Scholar

page 112 note 1 Journal of the Amer. Acad, of Arts and Science, 1882, 17, 62.Google Scholar

page 113 note 1 Analysis of Steel-works Materials.

page 120 note 1 Landw. Vers. St. 1905, 63, 141.Google Scholar

page 120 note 2 Extracts obtained by shaking soil with dilute acid solvents such as 1% citric acid contain considerable quantities of silica.