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Published online 1 September 1962
Published in Agron J 54:464-465 (1962)
© 1962 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
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Hydrometer Method Improved for Making Particle Size Analyses of Soils1

George John Bouyoucos2

Synopsis: The time required for dispersing soils for the hydrometer method of making particle size analyses was reduced from 25 minutes to only 2 minutes. The procedure consists of soaking the soils in a 5% Calgon solution for 15 to 20 hours and then dispersing them with a soil mixer running at a speed of about 16,000 r.p.m., for 2 minutes.

1 Contribution from the Soil Science Department, Michigan Agricultural Experiment Station and authorized for publication by the Director as Journal Article No. 2830.

2 Professor Emeritus of Soil Science.

Received for publication January 19, 1961.


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The SCI Journals Crop Science Vadose Zone Journal
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Environmental Quality		 The Plant Genome
Copyright © 1962 by the American Society of Agronomy.