Heretofore in the usual locality where wet-land rice leaf blight occurs, flooded areas were considered the normal condition. However, above and beyond this, in Saga prefecture, there were some areas where the usual outbreak occur. Considering this in the category of 'Poor Rice Land in the Broad Sense,' the authors already classified them as standing water type poor rice fields. In general, with this type of region even the yield of wet-land plants are unstable. Furthermore, the development of the winter crop is not good. Accordingly, an investigation was made on the characteristics of the wet-land field soils as well as on the development of the wet-land rice plant and submitted as data for later improvements.