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。 If the various operations of agricultural production are not completed in time, the output of crops will be affected. In particular, harvesting and sowing operations will be delayed during the busy season and are often outdated due to the pressing of time. We should allocate more machines to achieve timely operations. However, Equipped with too many machines, more investment, but also increased the cost of production. In this paper, the mathematical method of seeking the extreme value makes the loss of timely and the sum of the production cost of the equipment investment as a minimum.