Nguyễn Xuân Hồng (trang 78- 79) Từ khoá: kết quả, nghiên cứu, cố định, nitơ, nitơ hội sinh, rễ, lúa Some results of studying associative nitrogen fixation in the Rhizophere of rice (Oryza sativa L.) Summary Effect of the inoculation of the improved nitrogen-fixing bacteria in association with a rice variety T65 cultivated in large …

Triệu Kỳ Quốc (trang 71-77, 80) Viện Khoa học Đất, Viện Hàn lâm Khoa học Nam Kinh, Trung Quốc Từ khoá: quản lý đất, quản lý nước, canh tác, lúa nước, Trung Quốc Management of soils and water in irrigated rice cultivation

Phạm Văn Lăng (trang 67-70) Từ khoá: kết quả, nghiên cứu, đất, phân bón, Hải Hưng Studies on soils and fertilizers in Hai Hung province Summary Results of study were divided into 8 groups. Hai Hung has potentiality for the development of the different cropping systems. In winter season, crop yield increased significantly at 90 …

Nguyễn Xuân Cự (trang 61- 66) Từ khoá: thành phần, động thái, photpho, đất phù sa, phù sa, lúa, Thái Bình Fractions and dynamics of phosphorous in alluvial soils under rice cultivation of Thai Binh province Summary Research work on 40 soil samples from 2 different alluvial soils of Thai Binh province. Fractions of mineral …

Nguyễn Văn Nhân (trang 57-60) Từ khoá: đánh giá, đất, thông tin, quy hoạch, đất phèn, Đồng Tháp Mười Land evaluation: a database for land use planning (a case study of acid sulphate soil area in Plain of Reeds, Mekong Delta) Summary Lanf evaluation enables to generate an essential data base for land use planning, …

Chu Xuân Ái (trang 52-56) Từ khoá: yếu tố, dinh dưỡng, chè, Phú Hộ Initial investigation of the essential nutrients of some tea – varieties at Phu Ho station Summary Applying the diagnostic’s method of tea leaves having the differences: of growth, productivity and quality in order to discover the nutrition characteristics, according to the …

Đoàn Triệu Nhạn, Lê Đình Sơn (trang 45-51) Từ khoá: nghiên cứu, đất, phân tích, lá, sử dụng, phân bón, cà phê, miền Bắc, Tây Nguyên Results of research on soil, leaf analysis and fertilizer use for coffee in N.V.N and the central highland Summary Fairly extensive studies undertaken on soil leaf analysis and the …

Đỗ Ánh, Bùi Đình Dinh (trang 35-44) Từ khoá: đất, phân bón, cây trồng Soils – fertilizers – crops Summary Great achievement has been obtained in Vietnamese agriculture. In 1990, food production reached 21 million tons. Many case studies on soils, fertilizers and major crop have been carried out, which contributed to farming intensification and …

Nguyễn Tử Siêm, Thái Phiên (trang 32-34) Từ khoá: thoái hoá, nghiên cứu, sử dụng, đất, đất đồi núi Deterioration risk of the uplands in Vietnam and research priorities for their management Summary In function of numerous adverse factors the uplands in Vietnam are being seriously deteriorated. While the agricultural use limits its impact in …

Lê Duy Thước (trang 27-31) Từ khoá: canh tác, chế độ, đất, đất dốc, đất đồi núi, nương rẫy Comparative cultivation system on sloping soils under shifting cultivation in mountainous regions of Vietnam