Abstract
Shizukari field near Oshamanbe in Hokkaido, about 570 ha, was appointed as a natural monument zone for studying plants of steppe in 1922. Owing to the development of land, the appointment was released in 1951,so requested by Hokkaido Education Committee, the nature of peat soils in the field was recorded along four lines as shown in figures. The areas of lower moor and high moor are very wide, while intermediate moor is narrow. And almost moor contain volcanic ash soil layer which thickness is about 3 cm. Depth of existence of the layer is indefinite. But the layer is very hard, and is shelf form at marsh shore. pH value of moor is 5.4〜5.6.
