Land Fertility Assessment Of Dancheng County Based On The Principles Of Land Quality Assessment

Land quality is the basic nature of land property, land quality assessment of land quality assessment is a technical, systematic that which is the basis of agricultural production, land classification, land use planning and management. A comprehensive summary and study of Land quality evaluation and index system theory has an importan effect on optimization of agricultural structure adjustment of the layout and management of sustainable land use, land-use planning and land. First this paper set forth evaluation of land quality and significance of the background of a brief exposition on the domestic and international quality assessment study of the land history and current status of a comprehensive summary and combing, then discuss the quality of its evaluation of land concept and content analysis.This study is based on theory of sustainable land use, soil fertility theory, location theory and differential land rent theory as the theoretical basis of land quality evaluation, AHP and Delphi method for land quality evaluation system and related factors for the establishment and set weights In carrying out practical research in land quality and agricultural production practice, a comprehensive analysis of combining with the dominant factor, consistency and the principle of combining the relative. Land quality evaluation contains outside the industry and the quality ,their assignment are : the main scope of stage of outside the industry of the evaluation work is selected to establish the purpose of assessment of land quality evaluation, design survey and then prepar soil samples collected tools, and evaluation of regional the land quality assessment of soil, hydrology, light, population and economic status of the collection of information and maps. Internal Operation Jie Duan is using levels of analysis established by land quality evaluation index systemt, and then we can reach conclusion on the data for method . Some empirical studies i selected Henan Dan ChengCounty as object of study,Dan Chengcounty conducted a comprehensive survey of the land quality and analysis, the results achieved is consistent with the result that which is Dan ChengCounty basic land use and agricultural survey, and played a great role for the next stage in phase of land quality evaluation.By analyzing Dan ChengCounty agricultural output ,soil organic matter, N, P, K, and other nutrients and PH value and layout of planting structure, we can conclude that the result in this paper is consistent with this assessment of the requirements of agricultural development Dan ChengCounty and proposed layout optimization of agricultural structure. Dan ChengCounty should be expanded wheat acreage, improve yields, increase the total output, increased commodity rate. Appropriate expansion of corn acreage and increasing yields as the main way to improve the cool autumn, compressed soybean area, secure area sesame, peanut area to expand.study on The land quality assessment is a very broad field , because of some difficulties in the data collecting , in order to ensure that the evaluation of scientific, validity, accuracy, the thesis mainly aimed at nature land evaluation ,the range of soil nutrient and soil quality assessment, and according to the evaluation results combined with grain yield analysis. learning to further strengthen and perfect in the future because all kinds of urban construction land and rural construction land involved less.