WebGIS-based information system for evaluation of soil environment in prime farmland;

Study on the dynamic monitoring of prime farmland based on high-resolution satellite images——with Gucheng as an example;

Ecological reconstruction of derelict mined-land in conservation areas of prime farmland;

Dynamic monitoring and the results analysis of the environmental quality on three basic farmland in Yunnan;

Studies on the basic farmland protection in hilly and mountainous counties;

The problems and countermeasures of basic farmland adjustment in Hunan Province;

Study on protecting measure of the cultivated land and the primary farmland in Bijie,Guizhou province;

Therefore,the paper argues that a series of countermeasures are needed urgently,and it goes on to provide some specific methods: appropriately checking and reducing the area of primary farmland,and putting emphasis on the quality of primary farmland,taking land use management of .

This paper summarizes the researches on the stock of primary cultivated land,and designes two models to calculate the province-level stock of primary farmland.