Analysis of spatial and temporal differences of nitrogen and phosphorus contents in agricultural soil
SHEN Jie-yu, YANG Si-yu, HU Ai-ling, XU Feng, HUANG Yun-xin
HUBEI AGRICULTURAL SCIENCES . 2020, (7): 68 -71 .  DOI: 10.14088/j.cnki.issn0439-8114.2020.07.015