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.

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.

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.

Reprinted from Plant and Soil, v.174, nos.1-2 (1995), this volume is devoted to discussions on the role of biological nitrogen fixation (BNF) in agricultural sustainability. Papers presented on BNF in crop forage and tree legumes are augmented with discussion of integrated farming systems involving BNF, soil and N management, and recycling of legume residues. BNF by non-legumes is discussed and attempts to transform cereals into nodulating plants are critically reviewed. Also described are advances in the development of new methodologies to understand symbiotic interactions and to assess N-2 fixation in the field; means of enhancing BNF through plant and soil management; breeding and selection; problems encountered in exploiting BNF under farmers' field conditions; and promising approaches to improve BNF exploitation. Lacks a subject index. Annotation copyright by Book News, Inc., Portland, OR

Reports on recent research designed to help increase the productivity of scarce tropical farmland without damaging the environment by gaining a better understanding of the chemical, biological, and ecological aspects of relationships between the critical element nitrogen in plants and soils. Describes the use of isotopically- labeled nitrogen in experimentation, the impact of the tropical environment on nitrogen transformation in the soil, annual fluctuations of native available soil nitrogen, the interaction of major fertilizers with different soils, the role of micro-flora in nitrogen availability, the behavior of applied nitrogen in wet and submerged soils, and advances in nitrogen-fixing by Rhizobium- legume symbiosis. All but 10 of the 42 papers are reprinted from Fertilizer Research vol. 42 nos. 1-3 (1995). No index. Annotation copyrighted by Book News, Inc., Portland, OR