Nguyễn Thúc Huyên (trang 14-20)
Từ khoá: hình thái học, địa hoá học, đất xám, phù sa cổ
Morphological and geochemical characteristics of old-alluvial soils (OASs) in Vietnam
OASs soil group is one of few other soil groups in Vietnam having the most variable special and attractive morphologies, depend on microrelief, vegetations, production way, water regime… in the soils. The superiority of kaolinite and strongly clay decomposition and leaching decrease of dim out the presence of many 2:1 clay. Even kaolinite can be also destroyed. Danger of being degenerated of the soils are very urgent. However, with the establishment of “climax-under forest”, “climax-flooding”, … combine with other technical and technological means in agriculture and forestry production, OASs progressive evolution will be sustainable.