Lê Đức (trang 170-181)
Từ khoá: hàm lượng, đồng, mangan, molipden, đất, miền Bắc
The content of microelement (Cu, Mn, Mo) in some main soil types in the north of Vietnam
Total contents of Cu, Mo, Mg in all soil groups increased with the depth of the soil profile due to the increase of clay content. Available contents of Cu and Mo and exchangeable content of Mg decreased with the depth of the soil profile. The content of reduced Mg at pH 1.0 and 8.0 increased with the depth of the soil profile accompanying with the increase of the clay content and the reduced condition. Percentage of various forms of Cu, Mn, Mo is low comparing with the total, so the main content of these elements in soils are not available for crops.