Abstract
In this paper chemical properties of soils from Japanese acid clay (Itoigawa, Niigata Pref.) were reported. PH of iso-electric point measured by electrocataphoreses method was lower than that measured by electroendosmosis method (See Table 5). This was considered to be due to the action of humus combined with clay. In the 2nd horizon a fairly large amount of aluminium became to be solved in dilute HCI solution, shown in Table 5. Compared with other Japanese various soils the soil from weathered Japanese acid clay was concluded to have a tendency of having alitic properties in spite of the parental acid clay being sialitic.
