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
Total Pages: 512
Release: 1992-10-27
Genre: Science
ISBN: 9780471935605
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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.

Parmana

Parmana
Author: Anna Curtenius Roosevelt
Publisher: Academic Press
Total Pages: 337
Release: 2014-05-10
Genre: Social Science
ISBN: 1483276554
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Parmana: Prehistoric Maize and Manioc Subsistence along the Amazon and Orinoco argues for a reinterpretation of prehistoric subsistence in the Greater Amazonian region of South America. Based on the preliminary results of an archaeological fieldwork in Parmana of the Orinoco basin, Venezuela, the book re-evaluates some of the assumptions made by anthropologists about human adaptation and the development of aboriginal culture in Amazonia. Comprised of six chapters, this volume begins with a review of the theories of five scholars of aboriginal Amazonia in terms of logic and documentation: Julian Steward, Betty Meggers, Robert Carneiro, Donald Lathrap, and Daniel Gross. The next chapter presents an alternative theory, the hypothesis of technological change, and explains its theoretical framework. The demographic theory of cultural evolution is discussed, and its basis in general evolutionary theory is explained. Subsequent chapters focus on the empirical evidence for the hypothesis in studies of tropical resources, with emphasis on the productivity of tropical lowland soils and Amazonian faunal resources as well as the roles of maize and manioc in prehistoric Amazonian subsistence; the physical and biological characteristics of the Parmana region as an environment for prehistoric human adaptation; and the history of subsistence and population growth in prehistoric Parmana. The final chapter suggests possible directions for future research on the development of aboriginal culture in Amazonia. The book is illustrated with numerous maps, tables, and photographs, most of them never published before. This monograph should be of interest to archaeologists and anthropologists.