IMPROVEMENT OF PHYSICAL AND MICROBIOLOGICAL PROPERTIES OF SOIL THROUGH POLYMERS APPLICATION

Abstract

In this study, five diversified types of extracellular polysaccharides (EPs) naturally produced by soil microbial cultures were used: xanthan from Xanthomonas isolates; dextran from Leuconostoc isolates; alginate from Azotobacter isolates; pullulan from Aureobasidium pullulans strains and curdlan from Rhizobium isolates. Isolation of different isolates of Xanthomonas, Leuconostoc and Azotobacter was performed on specific media from various samples while Aureobasidium pullulan and Rhizobium cultures were obtained from the unit of bio-fertilizers, Ain Shams Univ.