Water Production Functions for Irrigated Agriculture
Author | : Roger W. Hexem |
Publisher | : |
Total Pages | : 231 |
Release | : 1978-01-01 |
Genre | : |
ISBN | : 9780608000299 |
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Author | : Roger W. Hexem |
Publisher | : |
Total Pages | : 231 |
Release | : 1978-01-01 |
Genre | : |
ISBN | : 9780608000299 |
Author | : Roger W. Hexem |
Publisher | : Wiley-Blackwell |
Total Pages | : 240 |
Release | : 1978 |
Genre | : Technology & Engineering |
ISBN | : |
Author | : Harry Wright Ayer |
Publisher | : |
Total Pages | : 36 |
Release | : 1981 |
Genre | : Agriculture |
ISBN | : |
Author | : Ariel Dinar |
Publisher | : Praeger |
Total Pages | : 270 |
Release | : 1996-08-23 |
Genre | : Business & Economics |
ISBN | : |
This work presents models that characterize the relationships between quantity and quality of irrigation water application, and agricultural production and the environment. A comprehensive modeling approach addressing both the benefits of irrigation and the potential negative effects is introduced. Physical-biological concepts are combined with economic and engineering principles to demonstrate the usefulness of the model for analyzing various water management and policy issues. Decision makers on all levels should find the modeling approach interesting and useful in the management issues from the farm to national levels.
Author | : J. W. Kijne |
Publisher | : CABI |
Total Pages | : 354 |
Release | : 2003 |
Genre | : Crops and water |
ISBN | : 1845933397 |
First title in a major new seriesAddresses improving water productivity to relieve problems of scarcity and competition to provide for food and environmental securityDraws from scientists having a multitude of disciplines to approach this important problemIn a large number of developing countries, policy makers and researchers are increasingly aware of the conflicting demands on water, and look at agriculture to be more effective in its use of water. Focusing on both irrigated and rain-fed agriculture, this book gives a state of the art review of the limits and opportunities for improving water productivity in crop production. It demonstrates how efficiency of water use can be enhanced to maximize yields. The book represents the first in a new series of volumes resulting from the Comprehensive Assessment of Water Management in Agriculture, a research program conducted by the CGIAR's Future Harvest Centres, the Food and Agriculture Organization of the United Nations and partners worldwide. It will be of significant interest to those working in areas of soil and crop science, water management, irrigation, and development studies.
Author | : National Research Council |
Publisher | : National Academies Press |
Total Pages | : 158 |
Release | : 2007-03-20 |
Genre | : Science |
ISBN | : 0309179254 |
This report contains a collection of papers from a workshopâ€"Strengthening Science-Based Decision-Making for Sustainable Management of Scarce Water Resources for Agricultural Production, held in Tunisia. Participants, including scientists, decision makers, representatives of non-profit organizations, and a farmer, came from the United States and several countries in North Africa and the Middle East. The papers examined constraints to agricultural production as it relates to water scarcity; focusing on 1) the state of the science regarding water management for agricultural purposes in the Middle East and North Africa 2) how science can be applied to better manage existing water supplies to optimize the domestic production of food and fiber. The cross-cutting themes of the workshop were the elements or principles of science-based decision making, the role of the scientific community in ensuring that science is an integral part of the decision making process, and ways to improve communications between scientists and decision makers.
Author | : Robert C. Johansson |
Publisher | : World Bank Publications |
Total Pages | : 68 |
Release | : 2005 |
Genre | : Abastecimiento de agua |
ISBN | : 6011709095 |
Abstract: Many countries are reforming their economies and setting macroeconomic policies that have direct and indirect impact on the performance of the irrigation sector. One reason for the movement toward reform in the water sector across countries is that water resources are increasingly becoming a limiting factor for many human activities. Another reason for increased pressures to address water policy issues is that many countries are in the process of removing barriers to trade, particularly in agricultural commodities. Therefore, knowledge of the value of water when crafting domestic and macroeconomic policies is important to compare the variable impacts of reform across sectors of the economy and populations within the country. Researchers have used many methods for assessing the value of irrigation water. This survey reviews a broad literature to ascertain how two basic questions have been addressed by research over the past few decades. First, what is the value of water across different sectors and levels? Second, how will this value change under different macroeconomic and domestic policies? This survey details a number of methods for approaching these two questions. The literature has been organized according to a progression from theoretical underpinnings to empirical approaches to how the value of irrigation services are relevant to the link between globalization and poverty.
Author | : Food and Agriculture Organization of the United Nations |
Publisher | : Food & Agriculture Org. |
Total Pages | : 116 |
Release | : 2002 |
Genre | : Technology & Engineering |
ISBN | : 9789251047682 |
In the context of improving water productivity, there is a growing interest in deficit irrigation, an irrigation practice whereby water supply is reduced below maximum levels and mild stress is allowed with minimal effects on yield. Under conditions of scarce water supply and drought, deficit irrigation can lead to greater economic gains than maximizing yields per unit of water for a given crop; farmers are more inclined to use water more efficiently, and more water-efficient cash crop selection helps optimize returns. However, this approach requires precise knowledge of crop response to water as drought tolerance varies considerably by species, cultivar and stage of growth. The studies present the latest research concepts and involve various practices for deficit irrigation. Both annual and perennial crops were exposed to different levels of water stress, either during a particular growth phase, throughout the whole growing season or in a combination of growth stages. The overall finding, based on the synthesis of the different contributions, is that deficit or regulated-deficit irrigation can be beneficial where appropriately applied. Substantial savings of water can be achieved with little impact on the quality and quantity of the harvested yield. However, to be successful, an intimate knowledge of crop behavior is required, as crop response to water stress varies considerably.
Author | : Surendra Nath Kulshreshtha |
Publisher | : |
Total Pages | : 87 |
Release | : 1990 |
Genre | : Irrigation |
ISBN | : |