Study on Developmental Tendency of Longnan City s Intercity Transportation Based on Gravitation Model;

Agri-Industry Current Situation and Development Measures in Longnan City;

Regional Comparative Advantages of Chinese Medicinal Materials Industry in Longnan City

Strategy on Utilization of Gene Resources Resistant to Stripe Rust in Longnan District Based on the Theory of Sustainable Control;

Determination and prediction of flood and drought index for late spring and early summer in Longnan mountain area;

Geological Calamity Distribution and Critical Rainfall in Longnan Region of Gansu Province;

A dynamic evaluation fragile environment in Longnan District;

Feature and mechanism of the social-economic system in poverty-stricken areas characterized by ecological frailties ——Taken Longnan District as a case;

The fragile ecological environment has been formed for a long time in Longnan district,which is located in the transitional zone among the southern of Gansu Province,thus it is particularly vulnerable to degradation due to its fragile ecosystem and the utilization of natural resources especially water and soil resource.

Geological characteristics of coal-bearing deposits of Longnan coalfield;

Status quo and countermeasures of leisure sports activities in Longnan area of Gansu Province;

Medicinal plant resources are abundant in Longnan area.

By the field survey and the analysis of indoor samples,the authors made a study of the Quaternary debris flow sediments and the formation history in Longnan area of the eastern fringe of Tibetan Plateau , and thinks that the Quaternary debris flow s activities in Longnan are amainly concentrate on 2.

A study on characteristics of forage grass growth in Southeast Gansu;