Farmland consolidation type zoning based on combination of grading factors

The purpose of this paper is to detailing the farmland zoning, and making the results suit to land scale, and then to improve the accuracy of farmland consolidation project. So basing on the results of the Agricultural Land Gradation, took the gradation unit for basic research unit, with the support of ARCGIS software, through analyzed the combined factors of CL and their combined types and the different limited strength of different types, we eventually zoning the farmland of Tianjin into three consolidation type zones. The results showed that there were 730 types of the CL combination and 42 species of the limiting factors combined type in Tianjin. Irrigation, organic matter and salinization were the relatively common limiting factors, key consideration was given to these three factors on farmland. Recent farmland consolidation should be arranged in Zone Three, and the main directions were water conservancy engineering construction and salinization governance; the long-term farmland consolidation should focus on Zone Two; although the Zone One had small area, it still needed soil and water conservation projects. This paper can play an important role in deepen the application of the farmland Gradation, and that study can rich the theory and method in Farmland type zoning, and then provide certain reference.