To understand the effect of cattle improvement and population size of dairy cows in Huangyuan County,artificial insemination record,conception rate and calving were investigated family by family.

The Qing Dynasty was a period of the sustained development of agriculture in Hehuang areas,a vast amount of land in rivers and creeks had been cultivated in the Qianglong period of Qing Dynasty.

This article probes mainly into the characteristics and cause for feudalization of Hehuang areas in Han Dyasty,and deems that carrying out the leap from the late period of primitive society to the feudal society in Hehuang areas in Han Dynasty depends on the special historical conditions and geographical circumstances at that time.

Talk about water resource continuous utilization in Qinghai Province Hehuang region;

The paper focused on the research of urban in Hehuang region of Qinghai province.

Although the exploitation of the Hehuang region during the Northern Song Dynasty proceeds from the demands of the military of theNorthern Song Dynasty, it objectively promotes the social congression and economic development of the Hehuang region, and is beneficial to thenational assimilation and the development of the border areas in the Western China.

Discussion of the Technical Approach of Soil and Water Conservation Vegetation Restoration in Hehuang Area of Qinghai Province;

The article have analysed condition and developing factors of Hehuang area, the advanced the region exploitation frame and countermeasure of sustainable development of Hehuang Qinghai.

Multi-culture co-existed in Hehuang area.

Remote sensing interpretation and its characteristics of the forest and shrub vegetation in Huang Shui area,Qinghai Province;