此摘要任务信息汇总了从所包括子任务的最早开始日期到最晚完成日期之间时间段的信息。
This summary task information summarizes the period between the earliest start date and latest finish date of all the included subtasks.
而农耕期终止日期首先从鲁中山区开始，由鲁西北北部逐步向鲁东南展开，终止日期最晚的是鲁南南部和鲁东南沿海；
The results showed that the beginning date of farming period started at southwest, and moved gradually to northeast, Shandong peninsula and the central mountain in Shandong province was late.
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