Chu Đình Hoàng (trang 205-207) Từ khoá:  bài toán, tính toán, cự ly, kênh mương, tiêu nước, cải tạo đất   Summary Algorithm in determining the distance between the two drainage canals in leading out the salt from homogenous soils Previous method in determining the distance between the two canals to depends on lower the …

Trần Viết Ổn (trang 198-204) Từ khoá:  kết quả, nghiên cứu, tổn thất nước, hệ thống thuỷ nông, miền Bắc   Summary Initial results on investigating the water losses in existing irrigation systems in the north of Vietnam The losses were more or less the same on the main, the second and on field canal …

Lê Văn Khoa, Nguyễn Quang Trung, Nguyễn Thị Việt Hồng (trang 189-197) Từ khoá:  nghiên cứu, biện pháp, pha loãng, ô nhiễm, nước, sông Nhuệ, nông nghiệp   Summary Research on diluting method to mitigate water pollution of Nhue river for the purpose of agriculture Results of study: water is heavy polluted in some heavy …

Nguyễn Khắc Thời, Nguyễn Xuân Thành (trang 182-188) Từ khoá:  động thái, vi sinh vật, đất, nhà máy giấy Bãi Bằng, Phong Châu   Summary Dynamics of soil micro-organism population in the soils where located Bai bang paper milling factory Density of microorganism in the soils was highest in spring and smallest in winter. Density …

Lê Đức (trang 170-181) Từ khoá:  hàm lượng, đồng, mangan, molipden, đất, miền Bắc   Summary 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 …

N.M.Maqsud (Lê Thái Bạt dịch) (trang 162-169) Từ khoá:  ô nhiễm, môi trường, thành phố Hồ Chí Minh, kim loại nặng, nước, bùn, kênh rạch   Summary Heavy metal accumulation in canal waters and sediments of Ho Chi Minh city Investigation for canal sediments show for following metals: As, Cd, Cr, Co, Pb, Cu, Hg, …

Trần Kông Tấu, Trần Kông Khánh (trang 152-161) Từ khoá:  nghiên cứu, môi trường, đất, kim loại nặng   Summary Soil environment of Vietnam through research heavy metals Research was carried out on some main soil types of Vietnam with 14 heavy metal elements including As, Ca, Cu, Co, Cr, Fe, Mn, Ni, P, Pb, …

Nguyễn Công Vinh, Thái Phiên (trang 141-151) Từ khoá:  quản lý, dinh dưỡng, đất, sắn   Summary Management of soil nutrient under cassava 5 degraded in term of soil properties – low soil fertility soil types were investigated. Application of mineral fertilizers increased cassava yield by 20-112% compared to control. Combination of organic manure, mineral …

Trần Công Hạnh, Vũ Hữu Yêm (trang 134-140) Từ khoá:  bón phân, phân hoá học, mía, đất đồi, Lam Sơn, Thanh Hoá   To find out chemical fertilizers application times with give high effectiveness to sugar cane in highly area of Lam Son, Thanh Hoa

Tôn Nữ Tuấn Nam, Trịnh Xuân Hồng (trang 123-133) Từ khoá:  dinh dưỡng, lưu huỳnh, cà phê, cà phê vối, Tây nguyên   Summary Sulphur containing fertilizer use for Robusta coffee in the highlands Coffee growth had very good response to S containing fertilizers in most experiments. Application of S-containing fertilizers not only improved available …