Evaluation of the primary soil fertility indices for the agricultural area of Yongqing County, Hebei Province

HU Qing-Hai, LI Jun-Hua, WANG Xue-Qiu, YI Ming-Xuan, WU Hui, TIAN Mi

Geophysical and Geochemical Exploration . 2023, (6): 1611 -1619 . DOI: 10.11720/wtyht.2023.1589