Water-quality data for nitrate plus nitrite, total nitrogen, and total phosphorus for sites in Red River of the North basin, 1970-2017

This child page contains 34 csv files, site_qw_nuts, which contain observations of nitrate plus nitrite as nitrogen (npnN), total nitrogen (TN), total phosphorus (TP)...本子页面包含34个逗号分隔值（Comma-Separated Values，CSV）文件，即site_qw_nuts，文件内存储了以氮计的硝酸盐与亚硝酸盐总量（npnN）、总氮（TN）、总磷（TP）等观测数据。