【摘要】 农业生产的各项作业,如不能及时完成,将影响作物的产量,尤其是收获、播种作业处在农忙季节、常因时间紧迫不能抢上农时而减产,多配备机器,可以达到适时作业,但配备机器太多时,投资多,又加大了生产费用。本文采用求极值的数学方法,使适时性损失及机具投资的生产费用之和为最小。更多还原

【Abstract】 If any operation of farming process can not be accomplished at proper time, the crop yield will be lowered by a certain amount. Especially, the harvesting and planting operations are usually busy in time and decreased the yield due to time loss. Equipped more machineries will cause the operations kept in pace with the appropriate working time for the crops, but more machines invested, more production cost will be. In this paper, we use the differential method to find the optimum quantity of machines to be equipped in order to obtain minimum timeliness cost and production cost in total.更多还原