Optimization of Monitoring Indexes of Nitrogen and Phosphorus in Rice Fields in the Lower Reaches of the Yangtze River Based on Cluster Analysis and Principal Component Analysis

HU Bing-tao, CHEN Yu-dong

Journal of Ecology and Rural Environment . 2020, (11): 1495 -1504 . DOI: 10.19741/j.issn.1673-4831.2019.0934