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This article in SSSAJ

  1. Vol. 33 No. 3, p. 421-423
     
    Received: Sept 26, 1968
    Accepted: Jan 14, 1969


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doi:10.2136/sssaj1969.03615995003300030025x

Influence of the Copper, Zinc, Iron, and Aluminum Salts of Some Microbial and Plant Polysaccharides on Aggregation and Hydraulic Conductivity of Ramona Sandy Loam1

  1. J. P. Martin and
  2. S. J. Richards2

Abstract

Abstract

The influence on soil aggregation and hydraulic conductivity of some microbial and plant polysaccharides and their Fe, Al, Cu, and Zn salts was determined. Specific effects were dependent upon the polysaccharide and the metal ion. In general, Fe and Al sharply reduced the effectiveness while Cu and Zn slightly reduced, exerted little effect or increased ther binding action. Chromobacterium violaceum polysaccharide and Karaya gum improved both aggregation and hydraulic conductivity. The polysaccharides from Azotobacter indicus and Arthrobacter viscosus increased aggregation but did not alter hydraulic conductivity. Azotobacter chroococcum polysaccharide in concentrations up to 0.1% improved hydraulic conductivity but did not affect aggregation while NH4-alginate exerted no effect on either soil property.

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