TILLAGE TRANSLOCATION AND TILLAGE EROSION PROCESSES AND THEIR TMPLICATIONS FOR AGRO-ECOSYSTEMS
As we begin the 21st century tillage research and practices will take significant new directions. This revolution will be driven by a growing awareness and understanding of the processes of tillage translocation and tillage erosion and of their implications for agricultural sustainability and environmental protection. Tillage translocation is the resultant displacement of soil by tillage. Soil can be moved meters by a single pass of tillage. The translocation of soil by tillage varies greatly within landscapes as a result of several factors; these include the design and operation of tillage implements and the topographic and soil properties of landscapes. The consequence of this variation in translocation is net soil redistribution within landscapes, i.e. tillage erosion. Typically, tillage results in the progressive downslope movement of soil, causing severe soil loss on upper slope positions and accumulation in lower slope positions. Tillage translocation and tillage erosion processes are described. An overview of the research to date is presented. A broad range of agri-anvironmental implications is examined including: crop productivity and greenhouse gas emission. Challenges and opportunities for tillage researchers are identified.
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万方数据
维普
