H Wien Nie, Vu Thi Hao, Tran Thi Hoai, Mai Gia Thao, Bui Cong Gia Bao, Nguyen Khac Manh, & Thai Tien Dung. (2022). Determination of total nitrogen and phosphorus in soil by ion chromatography with conductivity detector following persulfate digestion method . Journal of Military Science and Technology, (FEE), 272–278. https://doi.org/10.54939/1859-1043.j.mst.FEE.2022.272-278