The materials of present report were collected from reconnaissance soil survey of Kwangtung and Kwangsi provinces in 1958-1960. Soils investigated include yellow earths, red earths and lateritic soils. They are developed under natural vegetations of tropic monsoon forest (secondary), subtropic evergreen broadleaf forest, conifer and broadleaf mixed forest, subalpine dwarfing and bamboo ferests, confer forests of Cunninghamia lanceolata and Pinus massoniana, and grass land. A Few samples of rice paddy soil were also studied far comparison. Laboratory investigations involved the determination of chemical composition of forest litters, fraction of soil humus (after Turin and hononova), and analysis of soil exchangeable bases, active iron and alumina, etc.