HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Davis, R. J. Articles by Heald, W. R. Search for Related Content PubMed Articles by Davis, R. J. Articles by Heald, W. R. Agricola Articles by Davis, R. J. Articles by Heald, W. R.

Formation of Clay Mineral-Rhizobial Polysaccharide Gels and Their Measurement by Torque Viscometry¹

ABSTRACT

The gel-forming characteristics of several Rhizobial polysaccharides and clay mixtures were studied using a torque-type viscometer. This method was found to be both a rapid and a precise measure of the total effect of the added compound to clay than was the floc volume. Krillium and dextran were used as comparison compounds. Krillium greatly influenced the viscosity of clay suspensions, but dextran had no effect. All rhizobial poly-saccharides used had some effect on the properties measured, and most compared favorably with Krillium.

¹ Contribution from the U. S. Soils Laboratory, Soil and Water Conservation Research Division, ARS, USDA. This work was supported in part by the U. S. Atomic Energy Commission.

² Soil Scientists, Beltsville, Md.

Received for publication May 27, 1963. Accepted for publication September 9, 1963.