Wuqiao county is the typical agricultural production region in Heilonggang.

吴桥县是黑龙港地区典型农业生产区域。

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Investigation on natural secondery growth forest commulities in limestone mountain region of Shexian county;

本文以皖北地区的石灰岩山地为对象，对该地区的植被进行了调查和研究。

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Investigation on natural secondery growth forest commulities in limestone mountain region of Shexian county;

本文以皖北地区的石灰岩山地为对象，对该地区的植被进行了调查和研究。

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