Đỗ thị Lan, Nguyễn Thế Đặng, Gerhard Gerold (trang 201-208)
Từ khoá: thoái hoá, đất, canh tác, đất dốc, đông bắc Việt Nam
Sloping soil degradation under traditional cultivation in North-Eastern region
Nutrient levels lowered very quickly after 4 cultivated years on the slopping fields, especially in term of cation elements. Therefore, CEC and base saturation levels are low. Due to nutrient losses the annual crop yield reduced, especially maize. Reasons of soil degradation are inappropriate cultivated methods of farmers and unfavourable tropic weather.