Studies on the farm land consolidation of terrace paddy field area

1. 从平整和缓坡水田区农地整理进度对比来看，所谓阶地水田区（1/20以上的陡坡地）农地整理进度极其滞后。特别是中国和四国地区，地形和土地条件都很差，梯田面积占总水田面积的比例大大超过全国平均水平。基于这些认识，他对以下几点进行了调查和研究；一是综合把握梯田的分布、区位条件和土地利用的实际情况；二是充分发挥地域性特点的土地利用方式、耕作方式和聚落调整方式；二是农业基础设施的整理方向，以实现田向多用途化。在研究成果的完成中，我们站在与平坦区农地整理技术不同的角度，根据对坡地稻田农地整理执法实例的调查结果和积累数据的分析结果，完成了梯田区综合整理规划技术，以建立适合梯田区合理经济的施工方法。此外，在梯田面积整治效果的估算中，着重强调了促进常住、水资源利用和水土保持等延伸效应，并提出了其定量估算方法。

1. Judging from the comparison with the progress of farm land consolidation in both flat and gentle sloping paddy field area, that in the so-called terrace paddy field area (steep sloping land of more than 1/20) is late extremelly. Particularly, Chugoku and Shikoku districts, the topographical and land conditions are very poor, and the area rate of terrace paddy field to total paddy field extremely exceed the national average. Owing to these understandings, was had investigated and studied about the next points; first the synthetic grasp of actual conditions about distribution, condition of location and land use of terrace paddy field, second the way of land use, farming and adjustment of settlement making the most of regional characteristics, and the direction of agricultural infrastructure consolidation for the conversion of field into multipurpose one.2. In the completion of study results, we stood on a different viewpoint from the technique of farm land consolidation in flat area and completed the synthetic consolidation planning technique in terrace paddy field area for the establishment of rational and economical construction method suitable for terrace paddy field area based on the investigation results about enforcemen examples of farm land consolidation in sloping paddy field area and analytical results of accumulated data. Moreover, atthe estimation of consolidation effect in terrace paddy field area, we emphasized the extending effects like the promotion of permanent residence, dultivation of water resources and land conservation, and proposed its quantitative estimation method.