My Account: Log In | Join | Renew
Search
Author
Title
Vol.
Issue
Year
1st Page

Abstract

 

This article in SSSAJ

  1. Vol. 33 No. 1, p. 149-151
     
    Received: Aug 26, 1968
    Published: Jan, 1969


 View
 Download
 Alerts
 Permissions
 Share

doi:10.2136/sssaj1969.03615995003300010039x

Contribution of Humic Acid and a Polysaccharide to Water Repellency in Sand and Soil1

  1. S. M. Savage,
  2. J. P. Martin and
  3. J. Letey2

Abstract

Abstract

A silica sand and Pachappa sandy loam were treated at various pH's with aqueous suspensions of three microbial humic acids, a soil and peat humic acid, a microbial polysaccharide, and metallic salts of the tested organic substances. Of all the substances tested, only one, a humic acid isolated from a Stachybotrys atra culture, caused water repellency in the sand and soil. The Fe3+ and Al3+ salts of this humic acid rendered the sand and soil practically impermeable to water. The organic matter content of the extremely water repellent sands was less than .05%. The final conclusion of the paper is that humic acid-like substances and polysaccharides probably do not contribute much to water repellency in soils.

  Please view the pdf by using the Full Text (PDF) link under 'View' to the left.

Copyright © . Soil Science Society of America