Study On The Synthetical Method For Farmland Classification In County

Farmland classification is an important part of land evaluation. Farmland classification is closely related with potential evaluation , suitability evaluation, land economy evaluation and land sustainable evaluation etc. It is also an important means through which people can utilize farmland in reasonable ways and preserve the limited resource of farmland.The synthetical method of farmland classification is based on The regulations on farmland classification and gradation, which is issued by the Ministry of Land and Resources. By using those steady factors which are related to the quality of land, we can evaluate the quality of farmland both natural attribute and economic attribute synthetically and analyze their difference. Finally we can establish the system of grade which can be comparable in the whole country.To begin with, this paper reviews the domestic and international research results on farmland classification and its development direction, then it expatiates simply the research theories of farmland classification. After introducing some methods used in farmland classification, based on the existed experience, this paper discuss some existed problems about the synthetical method on farmland classification, such as the plotting methods of appraising subregion on farmland classification and the method of calculation on land use coefficient which is more scientific and reasonable and the method of selecting classification factors etc. Based on the case study Panyu district Guangzhou city, this paper introduce the whole course on the synthetical method of farmland and uses the above—mentioned theories to classify its farmland resources. Finally, writer puts forward to his own ideas and opinions for the existed problem about how to perfect the method of farmlandclassification.This paper mainly discussed the following problems about the synthetical method on farmland classification. It analyzes and compares all plotting methods of appraising subregion on farmland classification , then it summarizes the advantages and disadvantages about each plotting method of appraising subregion on farmland classification and points out their applied scope and noticeable aspects of each method. In the paper, we study how to reasonably calculate the land use coefficient and revise the method of calculation on land use coefficient in county so that it is more scientific and reasonable. We discuss how to select the classification factors and how to confirm power of factor according to the nature of district. The method of selecting classification factors according to the nature of district is summarized.Based on the discussion, the appraising system on farmland classification is more perfected . This paper solves those problems on farmland classification* such as how to select the plotting methods of appraising subregion on farmland classification, how to calculate the land use coefficient which is more scientific and reasonable and how to select classification factors and its power etc. The results of research can make classification more accurate and scientific. It also measures the distribution of quantity and quality more scientific and provides the criterion for layout and management of farmland.