抄録
In this paper it deals with the morphological, mechanical, and chemical characteristics of the Yellow Soil of Mikatagahara, Pacific Coast of Central Japan (See Table 1 and 2). 1. The soil owes its morphological properties largely to a slightly moist condition, which may be brought about either by flat relief or by moist climate. The Soil is fine in texture, ranging from clay loam to loamy clay. The A horizon is impregnated with humus, while the B horizon is bright yellow in colour, and many thin and rusty brown seams consististiug of ferruginous compounds occur in the B_2 horizon. The A_2 horizon does not show any evidence of bleaching. 2. According to heavily leaching, the soil is very strongly acid in readtion and the degree of base-unsaturation reaches to about 90 percent throught the profile. The colloidal cray fraction of the various horizons are ferallitic in composition. The soil is more allitic and unsaturated than the yellow soils of South China and Formosa. 3. Exchange reaction (pH in water minus pH in 0.01 n Na_2SO_4) of the various horizons show neutrality or alkalinity. From this and other properties it may be considered that the soil is subjected to the anionic solvation and eluviation and, consequently, is not a product of podzolization.
