Research On School Information Service Systembased On Android

China's rapid economic development,but for the management of land arable land has not kept up with the pace of the times,C hina's land quality because of environmental pollution,land development,water resources atrophy and other factors,arable land reduction and arable land quality is reduced.The quality of arable land is the cornerstone of the country,and it is also the basis of the cultivation of crops.Through the modern information technology,the quality of cultivated land can be effectively evaluated and managed,and the land management is more scientific.Yangshan County is located in the northwest of Guangdong Province,is a typical agricultural county of limestone mountains.Yangshan County,complex terrain,the overall North and South Gao Jun,and a single oblique mountain irregularly from both ends of the tilt to the hinterland,the formation of the middle low,surrounded by high boat shape.Mountain accounts for about 90% of the total area of the county,basin and impact plains account for about 10% of the county area.The seat of the county seat is surrounded by mountains,surrounded by high middle low,belong to the middle reaches of Lianjiang alluvial plain area.At the end of 2007,39946.87 hectares of arable land in Yangshan County,accounting for 11.94% of the total land area.Yangshan is very suitable for the study of cultivated land quality as an example.