Evaluation of farmland soil fertility in Jiuquan City based on principal component analysis
DENG Xi-ming, LYU Duo, WU Xiao-ting, FENG Tao, ZHANG Mei-zhen, ZHU Jian-qiang
HUBEI AGRICULTURAL SCIENCES . 2023, (3): 21 -24 .  DOI: 10.14088/j.cnki.issn0439-8114.2023.03.004