Andic properties and those spatial variability of Fulvic Andosols-related soils in certain hilly areas of northeastern Japan

研究了宫城县中部Ohira山和秋田县中部Toshima梯田上富尔维奇安多索土壤的ANDIC性质及其空间变异性。在研究区大部分坡位中，活性铝对土壤ANDIC性质的贡献较大，而坡脚部位由于特定的土壤水分条件，活性铁的贡献较大。山脚梯田和坡面土壤分别被归类为安迪克棕壤和荒漠棕壤，而山坡土壤则归类为水棕壤。坡位与ANDIC性质的关系显示了丘陵地区富尔维奇安多索相关土壤的空间分布的重要发现。

Andic properties and those spatial variability of Fulvic Andosols-related soils on the Ohira Hill in central Miyagi Prefecture and the Toshima Terrace in central Akita Prefecture were examined. In the most of slope positions on the studied areas, andic properties depended on the active aluminum, while strong contribution of active iron was confirmed in the foot slope due to the specific soil moisture condition. Soils on foot terrace and side slope classified Andic Brown Forest soils and Haplic Brown Forest soils, respectively, although those on foot slope classified Aquic Brown Forest soils. Relationship between slope position and andic properties shows an important finding about the spatial distribution of Fulvic Andosols-related soils in hilly areas.