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The determination of the number of bacteria in soil. II. Methods for the disintegration of soil aggregates and the preparation of soil suspensions

Published online by Cambridge University Press:  27 March 2009

C. L. Whittles
C. L. Whittles
Affiliation:
School of Agriculture, Cambridge.
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Extract

1. An apparatus is described which has been designed to impart a known number of vibrations per minute to a suspension of soil or other material.

2. The problem of the calibration of the apparatus is briefly discussed.

3. A new method for the comparison of the mechanical composition of suspensions is described.

4. Various preliminary treatments of samples of soil for mechanical analysis are compared, and it is shown that:

(a) The rate of wetting is an important factor.

(b) A combination of triturition and vibration gives a satisfactory degree of dispersion.

(c) The use of acids is not advisable.

Information

Type
Research Article
Information
The Journal of Agricultural Science , Volume 14 , Issue 3 , July 1924 , pp. 346 - 369
Copyright
Copyright © Cambridge University Press 1924

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References

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