Although the handcraft, connerce and agriculture were fairly prosperous in the jurisdiction area of Da Ming Fu (大名府) during ho dynasty, they were on the decline from Jin and Yuan dynasties on. The worsening of the ecological environment was the most important of the various various. The decrease of vegetation and the courses’ changing or inundation of Hanghe River (his) and Zhanghe River (漳 河) not only did the gnat damage to the local people’s production, but also made the soil covered with Sands or salified, thereby such the calamities as flood, waterlogging, drought and plague of locusts, occurred irregularly. In addition, the changing process of foe agricultural economic structure after Song dynasty, of Which the cotton - plantings rise and silk - spinning or weaving s decline was the key part.
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