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Biological Nitrogen Fixation and Sustainability of Tropical Agriculture

Biological Nitrogen Fixation and Sustainability of Tropical Agriculture
Author : African Association for Biological Nitrogen Fixation. Conference
Publisher : IITA
Release Date : 1992-10-27
Category : Science
Total pages :488
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Biological nitrogen fixation in tropical agrosystems: twenty years of biological nitrogen fixation research in Africa; Sustainable agriculture: definition and measurement; Biological nitrogen fixation systems in tropical ecosystems: an overview; A protocol for screening legumes as soil-improving crops; The sustenance of tropical agriculture with multipurpose azolla; Facteurs pedoclimatiques limitant la lixation biologique l'azole; Response of some tropical nitrogen-fixing woody legumes to drought and inoculation with mycorrhiza; Improvement to the Phaseolus/Rhizobium symbiosis, with particular reference to the Caribbean region; Effect of pest management systems on biological nitrogen fixation; Agronomic evaluation of a rock phosphate as a phosphorus source for Leucaena leucocephala grown on an utisol; Nodulation of soybean grown under field conditions and inoculated with Bradyrhizobium japonicum strains; Effect of fertilization and Rhizobium inoculation on the growth of Leucaena and Gliricidia on an alfisol in south-western Nigeria; Early growth and nodulation in Leucaena and Gliricidia and the effects or pruning on biomass productivity; Comparative stude on the growth and productivity of Sesbania and Leucaena in the Central Plateau region, Rwanda; Supernoculation and non-nodulation mutants of soybean; Genetically improved rhizobia and their use in agriculture; Sustainability of nitrogen-fixing cropping systems: Nodulation and nitrogen fixation and transfer in a cowpea/rice cropping system; The role of legumes in sustaiing soil productivity and controlling soil erosion; Fitting soil-improving legumes into inland valley rice-baes cropping systems in West Africa; Herbage yield and soil fertility restoration potential of some tropical forage legumes.

Biological Nitrogen Fixation and Sustainability of Tropical Agriculture

Biological Nitrogen Fixation and Sustainability of Tropical Agriculture
Author : K. Mulongoy,M. Gueye,D. S. C. Spencer
Publisher : Unknown
Release Date : 1992
Category :
Total pages :129
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Sustainable Agriculture for the Tropics

Sustainable Agriculture for the Tropics
Author : National Centre for Agrobiology Research,Universidade Federal Rural do Rio de Janeiro
Publisher : Unknown
Release Date : 1997
Category :
Total pages :129
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Management of Biological Nitrogen Fixation for the Development of More Productive and Sustainable Agricultural Systems

Management of Biological Nitrogen Fixation for the Development of More Productive and Sustainable Agricultural Systems
Author : International Rice Research Institute
Publisher : Int. Rice Res. Inst.
Release Date : 1995-09-30
Category : Nature
Total pages :291
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The subsistence agriculture of the pre-chemical era efficiently sustained the nitrogen status of soils by maintaining a balance between N loss and N gain from biological nitrogen fixation (BNF): the microbial conversion of atmospheric N to a form usable by plants. This was possible with less intensive cropping, adaptation of rational crop rotations and intercropping schemes, and the use of legumes as green manure. Modern agriculture concentrates on maximum output, however, overlooking input efficiency; It is not sustainable. Intensive monocropping, with no or inadequate crop rotations or green manuring, together with the excessive use of chemical N fertilizers, results in an imbalance between N gain and N loss. The losses are often larger than the gains, and soil N status declines. The challenge is to sustain soil N fertility in many different tropical and temperate farming systems operating at high productivity levels. This requires judicious integration of BNF components, maintaining a good balance between N losses and gains. In this book, papers on BNF in crop forage and tree legumes are augmented with discussions of integrated farming systems involving BNF, soil and N management, and recycling of legume residues. BNF by non-legumes are discussed, and attempts to transform cereals into nodulating plants are critically reviewed. Advances in the development of novel methodologies to understand symbiotic relations and to assess N 2 fixation in the field are described, and means are presented to enhance BNF through plant and soil management or breeding and selection. Problems encountered in exploiting BNF under field conditions are examined, as are promising approaches to improving BNF exploitation.

Biological Nitrogen Fixation for Sustainable Agriculture

Biological Nitrogen Fixation for Sustainable Agriculture
Author : J.K. Ladha,T. George,C. Bohlool
Publisher : Springer Science & Business Media
Release Date : 2013-03-09
Category : Nature
Total pages :212
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Chemical fertilizers have had a significant impact on food production in the recent past, and are today an indispensable part of modern agriculture. On the other hand, the oil crisis of the 1970s and the current Middle East problems are constant reminders of the vulnerability of our fossil fuel dependent agriculture. There are vast areas of the developing world where N fertilizers are neither available nor affordable and, in most of these countries, balance of payment problems have resulted in the removal of N fertilizer subsidies. The external costs of environmental degradation and human health far exceed economic concerns. Input efficiency of N fertilizer is one of the lowest and, in turn, contributes substantially to environmental pollution. Nitrate in ground and surface waters and the threat to the stability of the ozone layer from gaseous oxides of nitrogen are major health and environmental concerns. The removal of large quantities of crop produce from the land also depletes soil of its native N reserves. Another concern is the decline in crop yields under continuous use of N fertilizers. These economic, environmental and production considerations dictate that biological alternatives which can augment, and in some cases replace, N fertilizers must be exploited. Long-term sustainability of agricultural systems must rely on the use and effective management of internal resources. The process of biological nitrogen fixation offers and economically attractive and ecologically sound means of reducing external nitrogen input and improving the quality and quantity of internal resources. In this book, we outline sustainability issues that dictate an increased use of biological nitrogen fixation and the constraints on its optimal use in agriculture.

Symbiotic Nitrogen Fixation

Symbiotic Nitrogen Fixation
Author : Rachid Serraj
Publisher : CRC Press
Release Date : 2004
Category : Technology & Engineering
Total pages :367
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The International Workshop on Biological Nitrogen Fixation for Increased Crop Productivity, Enhanced Human Health and Sustained Soil Fertility was held in June 2002 at ENSAM-INRA, Montpellier, France. The main goal of the workshop was to define research strategies for a Challenge Program initiative on Biological Nitrogen Fixation, and develop a pre-proposal based on the concept note submitted and approved by the CGIAR iSC. More than 35 participants from various scientific disciplines, research institutions and from four different continents (Africa, Asia, Americas and Europe) attended the workshop. This book, based on the proceedings of the workshop, takes a holistic approach to harnessing legume BNF technologies, starting from a socioeconomic perspective, and progressing to agronomic and genetic options, and bringing together innovative aspects and participatory research strategies.

Biological Nitrogen Fixation Technology for Tropical Agriculture

Biological Nitrogen Fixation Technology for Tropical Agriculture
Author : Peter H. Graham,Susan C. Harris
Publisher : Unipub
Release Date : 1982
Category : Agriculture
Total pages :726
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Keynote addresses. Plant factors affecting N2 fixation. Technology for inoculant production. Environmental factors affecting symbiotic n2 fixation. Inoculation trials. N2 fixation in grain legumes. N2 fixation in pasture legume. N2 fixation in trees. Associative n2 fixation. The azolla/ananaena association. Critique of methodologies. The nitrogen relationships of maize/bean associations. Assessing the nitrogen contribuktion of cowpea (Vigna unguiculata) in monoculture and intercroped. Nitrogen fixation by groundnut (Arachis hypogeae) in intercropped and rotational systems. Effect of cowpeas in cereal rotations in conditions in Upper volta. Residual effects of pigeopea (Cajanus cajan). Atechology assessment of biological nitrogen fixation. Economic analysis of biological nitrogen fixation. Research and development for biological nitrogen fixation in India. The brazilian program in biological nitrogen fixation. Internationally sponsored development of biological nitrogen fixation technology. Research on biological nitrogen fixation in the international agricultural research centers.

Biological Nitrogen Fixation Technology for Tropical Agriculture

Biological Nitrogen Fixation Technology for Tropical Agriculture
Author : Centro Internacional de Agricultura Tropical
Publisher : Unknown
Release Date : 1981
Category :
Total pages :726
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Plant factors affecting N2 fixation; Technology for inocullation production; Environmental factors affecting symbiotic N2 fixation; Inocullation trials; N2 fixation in grain legumes; N2 fixation in pasture legumes; N2 fixation in trees; Associative N2 fixation; The azola/anabaena association; Critique of methodologies; General considerations.

Biological Nitrogen Fixation for Sustainable Agriculture

Biological Nitrogen Fixation for Sustainable Agriculture
Author : J.K. Ladha,T. George,Behzad Ben Bohlool
Publisher : Int. Rice Res. Inst.
Release Date : 1992-05-31
Category : Nature
Total pages :209
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Extended Versions of Papers Presented in the Symposium `Role of Biological Nitrogen Fixation in Sustainable Agriculture' at the 13th Congress of Soil Science, Kyoto, Japan, 1990

International Symposium Sustainable Agriculture for the Tropics: the Role of Biological Nitrogen Fixation

International Symposium Sustainable Agriculture for the Tropics: the Role of Biological Nitrogen Fixation
Author : Avílio A. Franco,Academia Brasileira de Ciências,National Centre for Agrobiology Research (Brasilien).,Universidade Federal Rural do Rio de Janeiro
Publisher : Unknown
Release Date : 1997
Category :
Total pages :255
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Journal of Pure and Applied Science

Journal of Pure and Applied Science
Author : Anonim
Publisher : Unknown
Release Date : 2001
Category : Science
Total pages :129
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International Symposium on Sustainable Agriculture for the Tropics

International Symposium on Sustainable Agriculture for the Tropics
Author : National Centre for Agrobiology Research. Universidade Federal Rural do Rio de Janeiro. Academia Brasileira de Ciencias
Publisher : Unknown
Release Date : 2007
Category : Agriculture
Total pages :255
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The Biological Management of Tropical Soil Fertility

The Biological Management of Tropical Soil Fertility
Author : P. L. Woomer,M. J. Swift
Publisher : Wiley-Blackwell
Release Date : 1994-12-05
Category : Science
Total pages :243
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This book reports on the first five years of research by scientists of the Tropical Soil Biology and Fertility Programme

Books in Print

Books in Print
Author : Bowker Editorial Staff
Publisher : Unknown
Release Date : 1994
Category :
Total pages :13800
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Nitrogen Fixation in Agriculture, Forestry, Ecology, and the Environment

Nitrogen Fixation in Agriculture, Forestry, Ecology, and the Environment
Author : Dietrich Werner,William E. Newton
Publisher : Springer Science & Business Media
Release Date : 2006-01-20
Category : Technology & Engineering
Total pages :350
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Sustainability has a major part to play in the global challenge of continued development of regions, countries, and continents all around the World and biological nitrogen fixation has a key role in this process. This volume begins with chapters specifically addressing crops of major global importance, such as soybeans, rice, and sugar cane. It continues with a second important focus, agroforestry, and describes the use and promise of both legume trees with their rhizobial symbionts and other nitrogen-fixing trees with their actinorhizal colonization. An over-arching theme of all chapters is the interaction of the plants and trees with microbes and this theme allows other aspects of soil microbiology, such as interactions with arbuscular mycorrhizal fungi and the impact of soil-stress factors on biological nitrogen fixation, to be addressed. Furthermore, a link to basic science occurs through the inclusion of chapters describing the biogeochemically important nitrogen cycle and its key relationships among nitrogen fixation, nitrification, and denitrification. The volume then provides an up-to-date view of the production of microbial inocula, especially those for legume crops.