FRACTIONATION OF SOIL HUMATE WITH PHENOLIC SOLVENTS AND PURIFICATION OF THE NITROGEN-RICH PORTION WITH POLYVINYLPYRROLIDONE
- 1 May 1973
- journal article
- Published by Ovid Technologies (Wolters Kluwer Health) in Soil Science
- Vol. 115 (5), 357-366
- https://doi.org/10.1097/00010694-197305000-00005