Vũ Hữu Yêm, Bùi Thế Vĩnh (trang 71-77)
Từ khoá: Hàm lượng, lưu huỳnh, đất, Bắc Việt Nam
Sulphur contents in some soil types in the North of Vietnam
Almost soils (except acid sunfat soil) in the north of Vietnam is poor in sulphur. In the fertilizer production strategy the single super phosphate has to be concerned, especially whenever area used nitrogenous fertilizer and KCl as potassium fertilizer.