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The determination of ammonia in soil

Published online by Cambridge University Press:  27 March 2009

Donald J. Matthews
Donald J. Matthews
Affiliation:
(Rothamsted Experimental Station.)
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Extract

Ammonia can be recovered from soil with an efficiency of 98·5 to 99·5 per cent, in six hours in the apparatus described.

For most purposes it is sufficient to aerate the soil for three hours.

Highly dunged glasshouse soils undergo partial decomposition in the cold with magnesia. In such cases the soil should be aerated with magnesia and strong sodium chloride solution for a definite time, say three hours.

The complete recovery of added ammonia from a calcareous soil is difficult unless the soil is finely ground.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 10 , Issue 1 , January 1920 , pp. 72 - 85
Copyright
Copyright © Cambridge University Press 1920

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References

page 72 note 1 Journ. Agric. Sci., 3 (1910), p. 233.CrossRefGoogle Scholar

page 73 note 1 DrBaragiola, W. J. and DrSchuppli, O.. “Die Bestimmung des Ammoniums im Boden u. s. w.” Die Landwirtschafttichen Versuchs-Siationen. Band XC (1917), p. 123.Google Scholar

page 73 note 2 Potter, R. S. and Snyder, R. S. “The Determination of Ammonia in Soils.” Iowa Expt. Sta. Ren. Bull, 17, October, 1914.Google Scholar

page 73 note 3 Kober, P. A. and Graves, , Sara, S. “Quantitative Ammonia Distillation by Aeration for Kjeldahl, etc.” III. Journ. Amer. Ghem. Soc., 35 (1913), p. 1594.CrossRefGoogle Scholar

page 76 note 1 The importance of ample scrubbing has been pointed out by Davisson, B. S., Journ. Indust. Eng. Chem., 10, 8 (08 1918).Google Scholar

page 77 note 1 I am indebted for this suggestion to Mr E. M., Crowther who has been using the apparatus for some months in this laboratory with complete success.

page 78 note 1 Loc. cit.

page 78 note 2 Loc. cit.