The oasis agriculture appears the special characters due to the eco - environment characters of arid area of northwest region.
西北干旱区内陆绿洲的主要生态环境特点，导致其特殊的农业特点；
Agriculture and communication were the important parts during the development of the northwest area in YUan dynasty.
元代西北经济开发的重点是农业和交通建设。
Agriculture and communication were the important parts during the development of the northwest area in YUan dynasty.
元代西北经济开发的重点是农业和交通建设。
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