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Water Availability And Soil Suitability For Irrigation Water Impoundments In The Federal District Of Brazil
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Book Synopsis Water Availability and Soil Suitability for Irrigation Water Impoundments in the Federal District of Brazil by : Jan Pruntel
Download or read book Water Availability and Soil Suitability for Irrigation Water Impoundments in the Federal District of Brazil written by Jan Pruntel and published by . This book was released on 1975 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estudos realizados durante um ano de precipitacao pluviometrica media demonstraram que um terco dessa precipitacao encaminha-se para a percolacao profunda. Esta agua e gradualmente liberada do reservatorio subterraneo e subsequentemente descarregada pelos rios e riachos, que sao as fontes mais importantes para irrigacao. A qualidade dessa agua para irrigacao e excelente. Durante a estacao chuvosa dispoe-se de abundantes quantidades de agua para irrigacao. As descargas minimas dos rios sao de 5 litros/seg por km2, no fim da estacao seca. Se fossem construidas instalacoes que servissem de reservatorio, esse volume poderia ser dobrado o que, talvez, permitisse a irrigacao de 5 a 10% do Distrito Federal. A agua subterranea poderia transformar-se em importante fonte de agua para irrigacao, principalmente em locais elevados. Ha nascentes que dispoem de agua para emprego imediato, principalmente, para irrigacao de areas de menor extensao. Ensaios de engenharia mostram alta infiltracao inicial e propriedades de permeabilidade dos solos que podem ser reduzidas por meio de compactacao em condicoes favoraveis de umidade.
Book Synopsis Masters Theses in the Pure and Applied Sciences by : Wade H. Shafer
Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2013-12-11 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis, (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity was transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 19 (thesis year 1974) a total of 10,045 theses titles from 20 Canadian and 209 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 19 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.
Book Synopsis A.I.D. Research and Development Abstracts by :
Download or read book A.I.D. Research and Development Abstracts written by and published by . This book was released on 1973 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sustainable Agricultural Systems by : Edwards
Download or read book Sustainable Agricultural Systems written by Edwards and published by CRC Press. This book was released on 1990-06-01 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique look at how the adoption of sustainable farming methods is being pursued throughout the world. This comprehensive book provides clear insight into research and education needs and the many points of view that come to bear on the issue of sustainability. Essential for agricultural leaders in research, education, conservation, policy making, and anyone else interested in creating an economically and environmentally sustainable agriculture worldwide.
Author :United States. Agency for International Development. Bureau for Technical Assistance Publisher : ISBN 13 : Total Pages :458 pages Book Rating :4.E/5 ( download)
Book Synopsis Catalogue of Research Literature for Development: Food production and nutrition by : United States. Agency for International Development. Bureau for Technical Assistance
Download or read book Catalogue of Research Literature for Development: Food production and nutrition written by United States. Agency for International Development. Bureau for Technical Assistance and published by . This book was released on 1976 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Irricab written by and published by . This book was released on 1979 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Measurements and Predictions of Evapotranspiration Rates from Irrigated Wheat in the Cerrados Region of Central Brazil by : Ariovaldo Luchiari Junior
Download or read book Measurements and Predictions of Evapotranspiration Rates from Irrigated Wheat in the Cerrados Region of Central Brazil written by Ariovaldo Luchiari Junior and published by . This book was released on 1988 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Soil-plant-water Relationships as Influenced by Various Soil and Plant Management Practices on Campo Cerrado Soils in the Central Plateau of Brazil by : Dale Eugene Bandy
Download or read book Soil-plant-water Relationships as Influenced by Various Soil and Plant Management Practices on Campo Cerrado Soils in the Central Plateau of Brazil written by Dale Eugene Bandy and published by . This book was released on 1976 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt: Short term drought periods during the rainy season, low soil water storage capacity, and highly acidic soils 80% Al sat. which inhibit root growth all give a combined effect of limiting yields for most crops in the Central Cerrado of Brazil. With those problems in mind, experiments were conducted in Brazil for two years to study the effect of a veranico (drought) on corn (Zea mays L.) growth and yield. The experiment were designed to provide a drought avoidance for the corn plant. In one experiment, soil management techniques were used to allow a crop to tap a greater quantity of the soil water stored in the soil. A second experiment used crop management techniques to increase water use efficiency by decreasing water loss from the soil surface and from the cornleaf. The soil management experiment consistent basically of lime rates and depths of line incorporation, i.e. 0-lime, 8T/ha lime incorporated to a 15 cm depth and 8T/ha lime incorporated to a 30 cm depth, and a broadcast verses banding application of phosphorus. Without plant water stress, no depth of lime effect was noted on plant growth before the tasseling stage. From silking to grain maturity, the deep limed plants maintained a longer period of active plant growth by delaying leaf senescence. The unlimed corn plants were always inferior to the limed plants with the dry-cool season crop showing a more pronunced decrease in plant growth. Measurements taken during an actual veranico or a simulated veranico showed that deep liming had a large effect (...).
Book Synopsis Bibliographic Guide to Latin American Studies by :
Download or read book Bibliographic Guide to Latin American Studies written by and published by . This book was released on 1981 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Predicting Water Constraints to Productivity of Corn Using Plant-environmental Simulation Models by : Imo Werner Buttler
Download or read book Predicting Water Constraints to Productivity of Corn Using Plant-environmental Simulation Models written by Imo Werner Buttler and published by . This book was released on 1989 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assumptions relating to the effect of water stress on crop growth inherent in the crop simulation model (Stockle & Campbell, 1985) used here, appear to be valid when applied to Cerrado conditions. Temperature and light effects on photosynthesis are considered in the calculation of a non-stressed photosynthetic rate, which is dependent on the amount of photosynthetically active radiation intercepted by the canopy. Thus, model predictions are sensitive to the predicted partitioning of potential evapotranspiration. Predicted leaf area indices and dry a matter accumulation over time compared well with measured data. Dry matter and leaf area were overpredicted in the most extreme water stress treatment, possibly due to soil fertility/water interactions not represented in the model. Harvest index was related more to water stress accumulated throughout the growing season, than to water stress accumulated during pollination, as was suggested by Stockle & Campbell (1985). Hourly predicted leaf water potential changes and corresponding changes in transpiration and photosynthetic rate represented the dynamics of water stress realistically and were consistent with expectations.
Book Synopsis Integrated Water Resource Management in Brazil by : Carsten Lorz
Download or read book Integrated Water Resource Management in Brazil written by Carsten Lorz and published by IWA Publishing. This book was released on 2014-10-15 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: The complex interactions between water resources, land-use change and water technologies are a major issue in many emerging countries of Southern America. Usable water resources are affected by natural conditions, such as, strong seasonal contrasts and high climatic variability, and rapid changes of land use and land cover that is caused by the dramatic expansion of agricultural land and urbanization processes. So far, the effects of the changing climate have had minor effects on water resources. Although regional data is rather scarce, global climate models predict substantial changes of climatic conditions in the future. A further pressure is that demand for water supply and waste water, both in terms of amount and spatial expansion, is increasing rapidly due to higher population densities caused by natural population growth and migration as well as higher per capita consumption. Integrated Water Resource Management in Brazil aims to present the results of the joint project IWAS-AGUA DF which deals with problems, causes and solutions in water supply in scope of integrated water resource management in western Central Brazil. The basic idea of the IWRM approach to be presented is to show how natural conditions and human interference are interacting and how technologies as well as concepts might help to manage such water resource systems in a sustainable way. Authors: Carsten Lorz, Hochschule Weihenstephan-Triesdorf, University of Applied Sciences, Germany, Franz Makeschin, Dresden University of Technology, Germany and Holger Weiss, Center for Environmental Research, Germany
Book Synopsis Ecology and Management of the World's Savannas by : J. C. Tothill
Download or read book Ecology and Management of the World's Savannas written by J. C. Tothill and published by C.A.B. International. This book was released on 1985 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Degrees in Latin American Studies, Cornell University by : Dan C. Hazen
Download or read book Advanced Degrees in Latin American Studies, Cornell University written by Dan C. Hazen and published by . This book was released on 1979 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Integrated Water Resources Management in the Federal District of Brazil by : Franz Makeschin
Download or read book Integrated Water Resources Management in the Federal District of Brazil written by Franz Makeschin and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agronomy News written by and published by . This book was released on 1975 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.
Book Synopsis Interaction Between Water Supply and Demand in Two Collective Irrigation Schemes in Nort-east Brazil. From Analysis of Management Processes to Modeling and Decision Support by : E. De Nys
Download or read book Interaction Between Water Supply and Demand in Two Collective Irrigation Schemes in Nort-east Brazil. From Analysis of Management Processes to Modeling and Decision Support written by E. De Nys and published by . This book was released on 2004 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past three decades, public irrigation schemes have been exposed to a process of management transfer from the central government and the funding agencies to local entities such as water users. associations and districts. However, this management transfer has been in many cases poorly implemented. Frequently reported problems are: inappropriate design; poorly specified management functions; ineffective accountability; unclear ownership of the collective infrastructure; and a lack of support services for achieving the transfer of management with success. In the Petrolina-Juazeiro region in the Northeast of Brazil, the CODEVASF (Company for the Development of the VaIleys of the São Francisco and the Pamaíba Rivers) has started to graduaIly transfer the management of public irrigation schemes to districts or local management entities. The districts are responsible for every day management, but they also need to make strategic decisions that affect the sustainability (technical, financial, socio-economic, environmental) of the irrigation schemes in the long run. This dissertation was set up in the irrigation projects of Mandacaru and Maniçoba, to analyse the scheme management by the main intemal stakeholders (scheme manager versus farmers), as weIl as to support them to solve problems and to plan ahead. The research focused on the interaction between the scheme manager's water supply and the farmers' water demand, since it is the central function inside the irrigation scheme. The water demand and the supply are analysed from a planning perspective, throughout the life cycle of the irrigation scheme, from the assumptions for its initial design to the operational reality at present. The analysis has shown that the scheme manager has been facing several difficulties to adjust his plan of water supply to the evolution of the water demand. The main reasons for these difficulties are: low margin of manoeuvre in the initial design of the water supply; the scheme manager's poor insight in the diversity of the farmers and their water demand, which is related to the district's lack of planning and monitoring of the parameters that affect water demand; and low capacity of the district to fund the cost of major adjustments without public financial support. A simulation model was developed to support the stakeholders' reflections on altemative plans of the water supply and demand. The modelling of the collective water supply is limited to its main infrastructure and organizational parameters. The coIlective water demand is modeI\ed by using a farm typology that gives a simplified representation of the diversity of the farms in the irrigation scheme, as well as their water demands. The main output of the model is the coverage of the water demand by the water supply at scheme levei. The aim of the modelling approach was to provide support to stakeholders so that they can simulate and evaluate prospective scenarios of the water demand and alternative plans of the water supply, for example the possibility to increase the water supply by organizing water delivery to farmers at night. During both the analysis of management processes and the modelling phase, a discussion group composed of district staff, farmers' representatives and technical assistance was involved. The feedback of the discussion group, as well as their questions and evolving demands, has shown the interest of the approach to support the stakeholders' learning process in irrigation management, and to link different functions of scheme management. Indeed, the debates within the discussion groups have gone far beyond the strict scope of the water flow between the district and the farmers, to tackle strategic issues at the individual and the collective levels. ln this respect, analyses and modelling approaches were also undertaken to support on-farm irrigation management in relation to the risk of soil salinization, and to support the choice of a water tariff system. Further analysis of the real contribution of this type of decision support methods in the stakeholders' learning process of irrigation management needs to be undertaken on other case studies, so as to evaluate their real interest and transferability to other specific situations of irrigation scheme management.
Book Synopsis Safe Use of Wastewater in Agriculture by : Hiroshan Hettiarachchi
Download or read book Safe Use of Wastewater in Agriculture written by Hiroshan Hettiarachchi and published by Springer. This book was released on 2018-03-09 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers a broad and global level description of the current status of wastewater use in agriculture and then brings the readers to various places in the MENA Region and Europe to explain how some countries and regions have addressed the challenges during implementation. On a global scale, over 20 million hectares of agricultural land are irrigated using wastewater. This is one good, and perhaps the most prominent, example of the safe use potential of wastewater. Water scarcity and the cost of energy and fertilisers are among the main factors driving millions of farmers and other entrepreneurs to make use of wastewater. In order to address the technical, institutional, and policy challenges of safe water reuse, developing countries and countries in transition need clear institutional arrangements and more skilled human resources, with a sound understanding of the opportunities and potential risks of wastewater use. Stakeholders in wastewater irrigation who need to implement from scratch or improve current conditions, find it difficult to gather the necessary information on practical implementation aspects. The main objective of this book is to bridge that gap.
