Submitted to: Agronomy Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: 11/3/1996
Publication Date: N/A
Technical Abstract: Humic substances were isolated from the surface soils of two British soil types using a sequence of aqueous solvents of increasing pH values. The isolates were diluted, the pH adjusted to 2, and fractionated into the different classic humic components using an XAD-8 and XAD-4 resin in tandem approach. Humic substances were isolated in the same way from the drainage waters from the soils. The humic fractions were characterized using several spectroscopy procedures, sugar, amino acid and elemental analysis, chemiluminescence, and chemical degradation processes and identifications of the digest products. The data will show distinct differences between fractions isolated at the different pH values, and the isolates at pH7 resembled those of the humic substances in the drainage waters most closely.