Kohler attributes the immediate cause of the abandonment to problems with corn production at a high altitude during short growing seasons.

科勒认为，（居住地）废弃的直接原因是高海拔地区的玉米生长季节较短，因此生产出现了问题。

Other archaeologists have identified the immediate cause of this abandonment to be a series of short growing seasons that would have put pressure on corn production at that high an altitude.

其他考古学家已经发现导致这种遗弃的直接原因是一系列短暂的生长季节，而这将会给生长在高海拔地区玉米的生产带来压力。

Guide farmers to expand rice and corn production as well as to increase grain variety.

引导农民扩大粳稻、玉米、杂粮等农作物生产。

Iowa, which leads the country in corn production, will use 58% of its crop for ethanol this year.

艾奥瓦是美国玉米的主要生产基地，今年这里58%的玉米会用于生产乙醇。

On this basis for corn production to future climate change adaptation measures were discussed.

并在此基础上对玉米生产适应未来气候变化适应性措施进行探讨。