Đỗ Thị Lan*, Nguyễn Ngọc Nông*
*Khoa Tài nguyên và Môi trường, Đại học Nông lâm Thái Nguyên
Từ khoá: ảnh hưởng, canh tác, nương rẫy, độ phì đất, vùng núi, Đông Bắc Việt Nam. Ba Bể, Bắc Kạn
Summary
The effects of cultivation on slope-land to soil degradation in north-east mountainous region of Vietnam – Case study in Ba Be – Bac Kan province
Nutrient levels decline very quickly after 4 cultivated years on the sloping fields, especially with regard to cation elements. Therefore, CEC and base saturation levels are low. Due to lost of nutrient led to the annual crop yields also reduced rather, especially maize. Reasons of soil degradation are unfavorable cultivated methods of the farmers such as mono-cultivation, influence of the weather like high rainfall, physical and chemical characteristics of soil.