<Notes>Distribution of Saline Soils in the Khorat Basin of Thailand: Preliminary Findings

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。The Khorat basin of Northeast Thailand is divisible into five categories with respect to the surface salinity : 1) elevated ground underlain by saline Mesozoic rocks, 2) heavily salt-affected lowland, 3) moderately salt-affected lowland, 4) slightly salt-affected lowland, and 5) non-saline. These five zones are shown in Fig. 1

Cation exchange equilibria in irrigated tropical soils

Typescript.Thesis (Ph. D.)--University of Hawaii at Manoa, 1972.Bibliography: leaves [192]-206.xvi, 206 l illus., table

<Notes>Saline Soils in Northeast Thailand : Their Possible Origin as Deduced from Field Evidence

この論文は国立情報学研究所の学術雑誌公開支援事業により電子化されました。The selected profiles of saline soils in the vicinity of Khorat, Northeast Thailand, are described. Geomorphological interpretation of the profiles make the following points clear regarding the origin of the salt : 1) Some shales and sandstones belonging to the Mahasarakam Formation of the Mesozoic Khorat Group retain in-situ salt even when they are located as little as 1 to 2m below the ground surface. The salt is released by erosion and weathering. This is the mechanism of extraction of salt from the source rock. 2) Only the Mahasarakam Formation seems to be a source of salt. Other rocks, including the older formations of the Khorat Group, appear not to contribute the development of salinity in the area, because they do not contain salt