Comparative Determination of the Spectral Properties and Colloidal Behaviour of Humic Acids of Sal Forest Soils of Doon Valley Planted with <I>Eucalyptus</I>

Abstract

The conditions of Eucalyptus monoculture has promoted the formation of humic acids in soils with a clearly expressed aromatic rings as comapared to surrounding sal. Correspondingly the number of peripheral chains has decreased and the hydrophillic nature is less marked; humic acids are only slightly dispersed and coagulate even with small amounts of electrolyte.