短語詞組短語soil fertility conservation crop 兼養(yǎng)作物soil water conservation 土壤蓄水soil moisture conservation cultivation 保墑耕作soil water conservation ability 土壤蓄水能力Soil Water Conservation Technician 水土保持技師soil moisture conservation 土壤水分保持soil and conservation 水土保持soil moisture conservation and irrigation 保墑灌溉soil fertility conservation and reinforcement 持肥固土 返回 soil conservation