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On the Probable Error of Sampling in Soil Surveys

Published online by Cambridge University Press:  27 March 2009

G. W. Robinson  and
W. E. Lloyd
G. W. Robinson
Affiliation:
Adviser in Agricultural Chemistry,
W. E. Lloyd
Affiliation:
Research Scholar, University College of North Wales, Bangor.
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Extract

The following paper records experiments made to determine the magnitude of the error involved in the sampling of a soil for survey purposes. While it is not held that the results obtained are true for all localities, they serve to indicate the order of magnitude of the various errors.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 7 , Issue 2 , September 1915 , pp. 144 - 153
Copyright
Copyright © Cambridge University Press 1915

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References

page 145 note 1 Trans. Chem. Soc. 1902, p. 883.

page 145 note 2 Since sending in this paper, the authors have seen a paper by Pfeiffer and Blanok, Landw. Versuchs. Stat. LXXVIII. Working on the nitrogen content of an experimental field, they obtained a field error of 2·5 per cent. This was, however, over a small area and the result is scarcely of service for survey purposes.

page 148 note 1 In mechanical analyses this error will be much greater if the temperature of sedimentation is not constant, owing to viscosity changes.

page 152 note 1 This Journal, Vol. III. p. 429.Google Scholar