Trần Sỹ Hải, Thái Phiên (trang 53-58, 48) Từ khoá:  ảnh hưởng, canh tác, xói mòn, dinh dưỡng, đất dốc, Lâm Sơn, Lương Sơn, Hoà Bình   Summary Impact of different farming systems on soil erosion and nutrient balance on sloping land at Lam Son, Luong Son, Hoa Binh Research in 1996-2001.experiment was designed with …

Phạm Tiến Hoàng (trang 49-52) Từ khoá:  phân hữu cơ, quản lý, dinh dưỡng, quản lý dinh dưỡng tổng hợp, cây trồng   Summary Organic fertilizer in the integrated crop nutrient management system Organic fertilizer is key factor in sustaining and preserving soil fertility. It is also an indispensable factor contributing to high productivity and …

Trần Thị Thu Hà (trang 45-48) Từ khoá:  ảnh hưởng, liều lượng, phân bón, vôi, năng suất, lạc, tính chất hoá học, đất phù sa   Summary Effect of different rate of phosphorus and lime on groundnut yield and soil chemical characteristics in poor alluvial soil Growth of groundnut was not affected by different doze …

Lê Thái Bạt (trang 42-44) Từ khoá:  đất nâu, Cao Bằng   Summary Identification the phaeozems in Cao Bang province Phaeozems in Cao Bang compose of 3 soil units and 4 soil subunits. They are porous, well aerated soils with moderate to strong, very stable, crumb to blocky structures. They have good water storage capacity. …

Tôn Thất Chiểu, Lê Thái Bạt (trang 36-41, 35) Từ khoá:  nghiên cứu, đất, Trà Lĩnh, Cao Bằng, phương pháp định lượng   Summary Investigation of soil resources in Tra Linh district, Cao Bang province following quantitative soil classification approaches Soil resources consists of 7 major soil groupings, 12 soil units and 32 soil subunits. …

Phạm Quang Hà (trang 29-35) Từ khoá:  độ chua, đất, đất phù sa   Summary Acidity problems in fluvisols of Vietnam in period 2001-2003 Study in 2001-2003 with 214 analysed samples. Result: average of pHH2O in fluvisol is 5.39-5.55 and pHKCl is 4.51-4.67. It confirms that fluvisols of Vietnam is not neutral, but is probably …

Trần Kông Tấu (trang 19-28) Từ khoá:  bề mặt riêng, tỷ diện, đất   Summary Specific surface of some main soil types of Vietnam Study was carried out by Maximum hygroscopic and “BET” methods. Specific surface of soils are: ferralsols (93.2-96.6) > acrisols (44.7-52.1) > fluvisols (16.1-40.8) > arenoslos (7.2). BET method is more accurate …

Nguyễn Ngọc Nông (trang 15-18) Từ khoá:  hàm lượng, nguyên tố vi lượng, kim loại nặng, đất, vùng núi, Bắc Việt Nam   Summary Content micro nutrients and heavy metals in some major soils in the north-east mountainous zone of Vietnam Zn, Cu contents there is at a low and medium level and much lower …

Nguyễn Hữu Thành (trang 9-14) Từ khoá:  kali, đất, đất xám bạc màu, Đông Anh   Summary Potassium status of hapli plinthic acrisols in Dong Anh district, Ha Noi 61 samples from 14 representative soil profiles. The soil is hapli plinthic acrisols. K content of the soil is very low. Total K is 0.10 -0.98%. …

Đặng Văn Minh (trang 5-8, 18) Từ khoá:  thành phần, lân, đất, chè, Đồng Hỷ, Thái Nguyên   Summary Phosphate fraction in the long-term tea cultivated soils at Dong Hy district, Thai Nguyen province Total P was higher in the cropped soils, as result of P fertilizer accumulation. High concentrations of NaOH extractable Pi (Fe …