Analysis on Temporal and Spatial Variation of Soil Nutrient Condition of Cultivated Land in Huanggang City
JIN Min, HU Zheng-quan, ZHANG Xiao-ming, LIU Jian-ying
HUBEI AGRICULTURAL SCIENCES . 2018, (9): 30 -32 .  DOI: 10.14088/j.cnki.issn0439-8114.2018.09.007