The assessment of the land sustainable use is the major content of the research of the land resource sustainable use. From a comprehensive perspective of the study in some countries, the author finds out about the current assessment method of land sustainable use has been limited for the serious division among specialties, the incompactness of the index system, the lack of the maneuverability the social acceptability and practicality. Considering the respect based on the theory of land sustainable use and the theory of resource value this paper the concept of the land composite value to research the sustainability of land use. The paper then elaborates on the implication and construction elements of the land composite value and the relation between land composite value and the land sustainable use, which supports the conclusion that the change of the land composite value reflects the degree of the land sustainable use. Next, the paper establishes a model calculating the land composite value and gives the method and criterions of the assessment of the land sustainable use. Finally, the paper illustrates the rationality of the method through the example of the use of the agricultural land in Yichang county.
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