ass日本风韵熟妇pics男人扒开女人屁屁桶到爽|扒开胸露出奶头亲吻视频|邻居少妇的诱惑|人人妻在线播放|日日摸夜夜摸狠狠摸婷婷|制服 丝袜 人妻|激情熟妇中文字幕|看黄色欧美特一级|日本av人妻系列|高潮对白av,丰满岳妇乱熟妇之荡,日本丰满熟妇乱又伦,日韩欧美一区二区三区在线

The state explicitly fully carried out the work of stripping the plow layer soil of cultivated land under construction, but the current research is rare about plow layer to strip and the soil resource space configure methods and empirical research, which is difficult to support the configure of plow layer soil-stripping and reuse. Based on the analysis of the spatial distribution of stripped soil supply-demand and the priority of replying, the supply-demand circles was delineated by the village, the spatial configure scheme of soil stripping and reuse was optimized by linear programming, and Binyang County, Guangxi Province was chosen as research area. The results showed that the plow layer soil of Binyang theoretical strippable was 2.40×106m3, and the remediation demand was 1.85×107m3. The supply of plow layer soil was far less than the demand and distributed unevenly in space. Based on the principle of priority of covering benefit, the priorities of the reply area were determined, and the allocation plan of the stripping plow layer soil was put forward. According to the plan, 5.2352×104m3 soil would be used to urban and rural construction land reallocation projects, 1.446637×106m3 soil would be used to land reclamation and development projects, 3.32738×105m3 soil would be used to cropping system of the rotation of upland crop and rice projects, 1.042804×106m3 soil would be used to high standard basic farmland construction projects. Binyang County was divided into seven supply-demand circles by using the supply-demand circle and linear programming model. The stripped soil was gradually used from high to low according to the priority of replying, the weighted average distance was 5369m, the recovery benefit was good and the economic cost was acceptable. The village as a unit of supply-demand circles, linear programming optimization of soil-stripping space configure method can optimize the use of ways, and shorten the transport distance, thereby enhancing the benefit and efficiency and providing reference for the implementation of plow layer soil-stripping and reusing in other regions.