【摘要】 通过分析山东降水与主要农作物产量的关系，得到降水对作物产量的动态定量贡献，从而获得人工增雨的最佳作业时间，并定量评估增雨对农作物的直接经济效益更多还原

【Abstract】 Relations of staple crops′ yields to precipitation in Shandong Province are investigated.The precipitation′s dynamic contribution to the yields is achieved, based on which optimal artificial raining is timely determined. Furthermore, the economic benefit brought about by artificial raining is appraised.更多还原