Fluorescence Characteristics of Humic Acid in Chinese Black Soil under Long-Term Fertilization
Clustering tree of the scores of the two principal components for all the field treatments (a) and the changes in humification indices ((b)â€“(h); see text for details). CK=control, NPK= NPK fertilizer, OM=organic manure, and MNPK=manure + NPK.
Article of the Year Award: Outstanding research contributions of 2020, as selected by our Chief Editors. Read the winning articles.