In the third part of this paper, the author analyses the natural and locational environment of Zhangye and sets up the periphery concept of the city.

Zhangye County home in 1927, removed in 1985 the county established as a city, by the State Council announced the second batch of historical and cultural city and city opening to the outside world.

For example, the quality of the middle reaches of Heihe river in Zhangye Basin is assessed by two models of comprehensive grade and fuzzy comprehensive evaluation.

Based on the experiments conducting in an intercropping field in Zhangye Oasis in the middle reach of Heihe River basin in 2003-2004, the characteristics of radiation budget are analyzed.

Effects of the combinations of sowing amount, N and P2O5 application on the yield and quality of Ganchun No. 20 spring wheat in different irrigation regions of Zhangye and Jingtai.