TY - Smart Agriculture A1 - Wu Caicong, Fang Xiangming T1 - Development of precision service system for intelligent agriculture field crop production based on BeiDou system Y1 - 2019-10-30 JF - Smart Agriculture JO - Smart Agriculture SP - 83 EP - 90 VL - 1 IS - 4 UR - http://www.smartag.net.cn N1 - 10.12133/j.smartag.2019.1.4.201911-SA001 ER -