Wasike, E. Mwangale .E.S.; Wasike, E. Mwangale .E.S.
(West Virginia UniversityWest Virginia University, 1966)
A 0.1; Na4P207 extract of soil organic matter pre-
treated to remove clays, fats and waxes was fractionated
into 6 average mol. wt. groups (O-5,000, 5-10,000, lO-
20,000, 20-50,000, 50-150,000, and greater than 150,000)
by ...