A Study On Arable Land Quantity Evaluation In Ecotone Of Farming, Pasture And Forestry In North By Using RS&GIS

The resources of the land is the material foundation that mankind rely for existence. Its quantity and quantities turn into directly safe and social stability of food of relate to the nation. In recent years, The development that industrialization and towns turn make our country the arable land quantity descends continuously; Mechanization, turn fatty and a great deal of devotion of etc. of agrochemical, bring the high-speed development to the agriculture. At the same time, it also causes a series of farmland to deteriorate the problem. How the coordination farmland using of resource and population increment, economy develop and the antinomy of the environmental protection, carry out the farmland resources to make use of continuously, become important topic of the contemporary agriculture field, the soil educational circles and the land management educational circles.Currently, our country adoption the factor method carries on the gradation to the agriculture with the ground, use the factor method to carry on the classification to it, but be important gradation of the method foundation to seldom revise the legal classification to then apply up the adoption. This text is to take the remote sensing data combine with the existing data software of ARCGIS9.2 of adopt the geography information system, taking Arong banner in inner Mongolia as an example, building up the gradation and settling the class system respectively. The gradation system is national target that the whole country can compare the system, With the light produces the natural condition, standard food of potential, farmland to fold to calculate, the land makes use of the correction, the land economy correction for many the target aggregation fasten, used for the reflection land quantity, make use of and performance etc. information. the classification system is the place target that the district can compare, with the natural quantity, geography position condition, farming makes a convenience of the degree for the main consideration evaluation system of the object, used for the reflection land inside the district makes use of the good and bad information. Gradation and classification is since have connection again distinguishing two concepts, the quantity of the same reflection farmland, but the contents dissimilarity for lay particular emphasis on.Study the result enunciation: Gradation in accordance with the classification while reflect the premise of the farmland quantity have oppositely distribute the trend. Although the gradation and classification is each from express a part of variety, all reflected the inside quantity of the land, it as a result has the same characteristic. This text in evaluating the foundation of result, on an equal footing do not the index number and the Class index numbers carry on the related analysis research, proved to classification result and agricultures use a nature etc. do not and make use of etc. do not it of relativity is gradually the relation that class pass into.