Alternate And Surge Flow Furrow Irrigation Methods For Onion Production Evaluation In Humbo Ethiopia
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Alternate And Surge Flow Furrow Irrigation Methods For Onion Production Evaluation In Humbo Ethiopia
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Author : Kassaw Beshaw
language : en
Publisher:
Release Date : 2020-06-22
Alternate And Surge Flow Furrow Irrigation Methods For Onion Production Evaluation In Humbo Ethiopia written by Kassaw Beshaw and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-06-22 with categories.
Master's Thesis from the year 2011 in the subject Biology - Ecology, Haramaya University (School of Graduate Studies), course: Irrigation Engineering, language: English, abstract: The aim of this experiment was to evaluate the conjunctive use of alternate and surge flow irrigation water application methods under field conditions. The specific objectives were: To evaluate flow characteristics and technical efficiency of alternate and conventional furrow irrigation under the application of surge flow, and to evaluate the combined effect of alternate and surge flow irrigations on the water use efficiency for onion production. The intermittent application of irrigation water in furrows permits more uniform distribution of infiltrated depth, considerable reduction of the volumes of water required, the possibility of using lighter irrigations, less water loss due to deep percolation and reduced leaching of fertilizers. All these benefits are associated with a clear reduction in the infiltration rate of the soil. This phenomenon occurs because, between one cycle and the next, the clods break up, particles are reoriented, and there is migration of the sediments that seal the base of the furrow. In addition, while the water supply in each cycle interrupted, air could trap in the soil pores. Both effects (reduction of infiltration and air interruption) facilitate the rapid advance of the water, solving the old problem of excessive losses of water by deep percolation at the beginning of the furrow. Therefore, many researchers are advocating the promises of surge flow irrigation in maximizing distribution uniformity, application efficiency, and minimizing the advance time, amount of irrigation water to be applied, loss of irrigation water through deep percolation and run off. Hence, the sustainability of the above-mentioned irrigation systems needs verification for local crop and management condition. Particularly, there are few works on the evaluation of combined use of the
Irrigation Principles Theory And Application
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Author : Raphael Muli Wambua
language : en
Publisher: GRIN Verlag
Release Date : 2019-04-09
Irrigation Principles Theory And Application written by Raphael Muli Wambua and has been published by GRIN Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-04-09 with Technology & Engineering categories.
Research Paper (postgraduate) from the year 2019 in the subject Agrarian Studies, grade: 1.0, Egerton University, language: English, abstract: Irrigation Principles (Theory and Application) is a text book intended for students and instructors in University or higher education for Certificate, Diploma and Degree students in a number of courses such as Irrigation and Drainage, Agricultural Engineering, General Agriculture, Agricultural Education and Extension, Horticulture, Water Resources Engineering, applied irrigation engineering and other allied professions. The content of the text book has been presented in a lucid style, arranged in coherent sequence that adheres to University and higher education curriculum. This makes the book suitable for relaxed reading. For the calculations, worked examples have been solved in a way of illustration and details are presented. Each chapter is concluded with the examples and review questions for the readers to expound on subject knowledge. For the purpose of improvement, any criticism from students, trainers and practitioners will be thankfully received by the author.
Making Water Security
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Author : Hermen Smit
language : en
Publisher: CRC Press
Release Date : 2020-02-04
Making Water Security written by Hermen Smit and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-02-04 with Science categories.
This book examines Nile water security through the morphology of the river: it uses the always changing form of the river as a theoretical and empirical device to map and understand how infrastructures and discourses dynamically interact with the Nile. By bringing a history of two centuries of dam development on the Nile in relation with the drainage of a hill slope in Ethiopia on the one hand and irrigation reform in Sudan on the other, the author shows how the scales, units and ‘populations’ figuring in projects to securitize the river emerge through the rearrangement of its water and sediments. The analysis of ‘Making water security’ is more than yet another story of how modern projects of water security have legitimized often violent dispossessions of Nile land and water. It shows how no water user is confined by the roles assigned by project engineers and planners. As ongoing modern ‘development’ of the river reduces the prospects for new large diversions of water, the targeted subjects of development and modernization make use of newly opened spaces to carve out their own projects. They creatively mobilize old irrigation and drainage infrastructures in ways that escape the universal logic of water security.
Biodiversity And Human Health
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Author : Francesca Grifo
language : en
Publisher: Island Press
Release Date : 1997-02-01
Biodiversity And Human Health written by Francesca Grifo and has been published by Island Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-02-01 with Health & Fitness categories.
The implications of biodiversity loss for the global environment have been widely discussed, but only recently has attention been paid to its direct and serious effects on human health. Biodiversity loss affects the spread of human diseases, causes a loss of medical models, diminishes the supplies of raw materials for drug discovery and biotechnology, and threatens food production and water quality. Biodiversity and Human Health brings together leading thinkers on the global environment and biomedicine to explore the human health consequences of the loss of biological diversity. Based on a two-day conference sponsored by the National Institutes of Health, the National Science Foundation, and the Smithsonian Institution, the book opens a dialogue among experts from the fields of public health, biology, epidemiology, botany, ecology, demography, and pharmacology on this vital but often neglected concern. Contributors discuss the uses and significance of biodiversity to the practice of medicine today, and develop strategies for conservation of these critical resources. Topics examined include: the causes and consequences of biodiversity loss emerging infectious diseases and the loss of biodiversity the significance and use of both prescription and herbal biodiversity-derived remedies indigenous and local peoples and their health care systems sustainable use of biodiversity for medicine an agenda for the future In addition to the editors, contributors include Anthony Artuso, Byron Bailey, Jensa Bell, Bhaswati Bhattacharya, Michael Boyd, Mary S. Campbell, Eric Chivian, Paul Cox, Gordon Cragg, Andrew Dobson, Kate Duffy-Mazan, Robert Engelman, Paul Epstein, Alexandra S. Fairfield, John Grupenhoff, Daniel Janzen, Catherine A. Laughin, Katy Moran, Robert McCaleb, Thomas Mays, David Newman, Charles Peters, Walter Reid, and John Vandermeer. The book provides a common framework for physicians and biomedical researchers who wish to learn more about environmental concerns, and for members of the environmental community who desire a greater understanding of biomedical issues.
Sustainable Agricultural Development
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Author : Mohamed Behnassi
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-02-09
Sustainable Agricultural Development written by Mohamed Behnassi and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-02-09 with Technology & Engineering categories.
Due to many challenges (i.e. climate change, energy, water and land shortage, high demands on food, land grabbing, etc.), agriculture production potential is expected to be seriously affected; thus, increasing food insecurity and hunger in many already affected regions (especially in Africa). In this context, sustainable agriculture is highly recommended as an eco-system approach where soil, water, plants, environment and living organisms live in harmony. Innovative technologies and research should be developed to ensure sustainable agriculture and productivity using modern irrigation systems, improved varieties, improved soil quality, etc. In the meantime, the preservation of natural environment should be based on resource conservation technologies and best management practices. Sustainable Agricultural Development, not only raises the serious ethical and social issues underlying these huge environmental problems, but also aims at presenting successful experiences from all over the world in relation with sustainable farming, sustainable management of water and land resources, and innovative processes in livestock production. It also aims at providing inputs to decision making processes and encouraging the transfer of relevant know-how, technologies and expertise to different countries where similar agro-climatic conditions may exist; thus saving precious resources and promoting sustainable agricultural development as a relevant approach to tackle the food security challenge. Finally, this book focuses on the paradigmatic and policy dimensions and call for an innovative approach by analyzing the key themes in a complex and interrelated manner.
Tropentag 2011
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Author : Eric Tielkes
language : en
Publisher: Cuvillier Verlag
Release Date : 2011-09-20
Tropentag 2011 written by Eric Tielkes and has been published by Cuvillier Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-09-20 with Science categories.
Sustainable Horticultural Systems
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Author : Dilip Nandwani
language : en
Publisher: Springer
Release Date : 2014-10-14
Sustainable Horticultural Systems written by Dilip Nandwani and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-10-14 with Technology & Engineering categories.
Sustainable horticulture is gaining increasing attention in the field of agriculture as demand for the food production rises to the world community. Sustainable horticultural systems are based on ecological principles to farm, optimizes pest and disease management approaches through environmentally friendly and renewable strategies in production agriculture. It is a discipline that addresses current issues such as food security, water pollution, soil health, pest control, and biodiversity depletion. Novel, environmentally-friendly solutions are proposed based on integrated knowledge from sciences as diverse as agronomy, soil science, entomology, ecology, chemistry and food sciences. Sustainable horticulture interprets methods and processes in the farming system to the global level. For that, horticulturists use the system approach that involves studying components and interactions of a whole system to address scientific, economic and social issues. In that respect, sustainable horticulture is not a classical, narrow science. Instead of solving problems using the classical painkiller approach that treats only negative impacts, sustainable horticulture treats problem sources.
Climate Change Resilient Agriculture And Agroforestry
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Author : Paula Castro
language : en
Publisher: Springer
Release Date : 2019-01-24
Climate Change Resilient Agriculture And Agroforestry written by Paula Castro and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-01-24 with Science categories.
This book collects wide-ranging contributions such as case studies, reviews, reports on technological developments, outputs of research/studies, and examples of successful projects, presenting current knowledge and raising awareness to help the agriculture and forestry sectors find solutions for mitigating climate variability and adapting to change. It brings the topic of ecosystem services closer to education and learning, as targeted by the Framework Convention on Climate Change and the Paris Agreement, the 2030 Agenda for Sustainable Development and the EU Biodiversity Strategy to 2020. Climate change and its impacts on agriculture and agroforestry have been observed across the world during the last 50 years. Increasing temperatures, droughts, biotic stresses and the impacts of extreme events have continuously decreased agroforestry systems’ resilience to the effects of climate change. As such, there is a need to adapt farming and agroforestry systems so as to make them better able to handle ever-changing climate conditions, and to preserve habitats and ecosystems services.
Handbook Of Farm Dairy And Food Machinery Engineering
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Author : Myer Kutz
language : en
Publisher: Academic Press
Release Date : 2019-06-15
Handbook Of Farm Dairy And Food Machinery Engineering written by Myer Kutz and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-06-15 with Technology & Engineering categories.
Handbook of Agricultural and Farm Machinery, Third Edition, is the essential reference for understanding the food industry, from farm machinery, to dairy processing, food storage facilities and the machinery that processes and packages foods. Effective and efficient food delivery systems are built around processes that maximize efforts while minimizing cost and time. This comprehensive reference is for engineers who design and build machinery and processing equipment, shipping containers, and packaging and storage equipment. It includes coverage of microwave vacuum applications in grain processing, cacao processing, fruit and vegetable processing, ohmic heating of meat, facility design, closures for glass containers, double seaming, and more. The book's chapters include an excellent overview of food engineering, but also regulation and safety information, machinery design for the various stages of food production, from tillage, to processing and packaging. Each chapter includes the state-of-the art in technology for each subject and numerous illustrations, tables and references to guide the reader through key concepts. Describes the latest breakthroughs in food production machinery Features new chapters on engineering properties of food materials, UAS applications, and microwave processing of foods Provides efficient access to fundamental information and presents real-world applications Includes design of machinery and facilities as well as theoretical bases for determining and predicting behavior of foods as they are handled and processed
Flower Seeds
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Author : M. B. McDonald
language : en
Publisher: Cabi
Release Date : 2005-01-01
Flower Seeds written by M. B. McDonald and has been published by Cabi this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-01-01 with Gardening categories.
The floral industry represents a significant proportion of agricultural income in several developed countries, particularly the USA, the Netherlands and Japan. Hitherto, the sheer diversity of flower seeds, in their form, function and biology, has hindered the production of a comprehensive treatment of the topic. This book provides a unique and much-needed resource of information on the biology and technology of flower seeds. It presents in-depth information on the history and evolution of the ornamental and wild flower seed industries followed by recommendations for successful breed and production programs. A comprehensive coverage of the biology of flower seeds is considered as well as appropriate technologies associated with germination, vigor and viability testing. In this volume, the first of its kind, international authorities from academia and industry have been brought together to provide a comprehensive reference resource for both practitioners and students of seed science and technology and of ornamental horticulture.