Read Books Online and Download eBooks, EPub, PDF, Mobi, Kindle, Text Full Free.
Impact Of Water And Nitrogen Management On Maize Actual Evapotranspiration Soil Water Extraction And Crop Water Productivity In South Central Nebraska Usa
Download Impact Of Water And Nitrogen Management On Maize Actual Evapotranspiration Soil Water Extraction And Crop Water Productivity In South Central Nebraska Usa full books in PDF, epub, and Kindle. Read online Impact Of Water And Nitrogen Management On Maize Actual Evapotranspiration Soil Water Extraction And Crop Water Productivity In South Central Nebraska Usa ebook anywhere anytime directly on your device. Fast Download speed and no annoying ads. We cannot guarantee that every ebooks is available!
Book Synopsis Impact of Water and Nitrogen Management on Maize Actual Evapotranspiration, Soil Water Extraction and Crop Water Productivity in South Central Nebraska, USA by : Daran R. Rudnick
Download or read book Impact of Water and Nitrogen Management on Maize Actual Evapotranspiration, Soil Water Extraction and Crop Water Productivity in South Central Nebraska, USA written by Daran R. Rudnick and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Maize Evapotranspiration, Canopy and Stomatal Resistances, Crop Water Productivity, and Economic Analysis for Various Nitrogen Fertilizer Rates Under Full Irrigation, Limited Irrigation, and Rainfed Settings by : Daran R. Rudnick
Download or read book Maize Evapotranspiration, Canopy and Stomatal Resistances, Crop Water Productivity, and Economic Analysis for Various Nitrogen Fertilizer Rates Under Full Irrigation, Limited Irrigation, and Rainfed Settings written by Daran R. Rudnick and published by . This book was released on 2015 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: A positive relationship existed between net income and crop water use efficiency (CWUE) and irrigation water use efficiency (IWUE). With consideration to IWUE, CWUE, and partial factor productivity of N, we recommend full irrigation under non-water limiting conditions and limited/deficit irrigation management strategies when water is limited, with N fertilizer rate not exceeding 196 kg ha-1 to achieve high economic return for the study area.
Book Synopsis Actual Crop Water Use in Project Countries by : Robina Wahaj
Download or read book Actual Crop Water Use in Project Countries written by Robina Wahaj and published by World Bank Publications. This book was released on 2007 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report aims to synthesize the results of a crop water use study conducted by country teams of the GEF/World Bank project, Regional Climate, Water, and Agriculture: Impacts on and Adaptation of Agro-ecological Systems in Africa. It also presents the results of the second phase of the study based on climate change scenarios, conducted by the South Africa country team. The actual evapotranspiration of five commonly grown crops-maize, millet, sorghum, groundnuts, and beans-in two selected districts were analyzed by six country teams. In addition, two country teams also analyzed other crops grown in the districts. The regional analysis shows that the actual yield of the different crops-specifically of maize and groundnuts-improves with an increase in actual evapotranspiration, although the gap remains wide between actual and potential yield and actual and maximum evapotranspiration, especially for the rainfed crops. This highlights the importance of improved water management if agriculture is to play an important role as a source of food security and better livelihoods. The report highlights the vulnerability of maize to water stress and the increased risks to the viability of rainfed farming systems based on this crop. The results of the second phase of analysis show that a 2°C increase in the temperature and a doubling of carbon dioxide concentration in the atmosphere will shorten the growing period of maize, which will result in decreased crop water requirement and use. The authors recommend extending this type of analysis to other crops as well as to other countries to develop a clearer picture of the changing pattern in crop water use of the major crops grown in the project countries.
Book Synopsis Effects of Nitrogen-water Relations on Maize Productivity by : Ondino C. Bataglia
Download or read book Effects of Nitrogen-water Relations on Maize Productivity written by Ondino C. Bataglia and published by . This book was released on 1980 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water and Nitrogen Interactions in Maize Production by : Tsz Him Lo
Download or read book Water and Nitrogen Interactions in Maize Production written by Tsz Him Lo and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is the author's sincere hope that the concepts, equations, and methods advanced by this dissertation will be tested, refined, and ultimately applied to improve on-farm irrigation and nitrogen management in west central Nebraska and beyond.
Book Synopsis Water Quality for Agriculture by : R. S. Ayers
Download or read book Water Quality for Agriculture written by R. S. Ayers and published by . This book was released on 1985 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Richtlijnen voor de werker in het veld om problemen te ondervangen ten aanzien van de waterkwaliteit voor irrigatie-doeleinden. Tenslotte worden praktijkervaringen uit diverse gebieden vermeld
Book Synopsis OECD Studies on Water Sustainable Management of Water Resources in Agriculture by : OECD
Download or read book OECD Studies on Water Sustainable Management of Water Resources in Agriculture written by OECD and published by OECD Publishing. This book was released on 2010-03-15 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report calls on policy makers to recognise the issues at stake in water resource management in agriculture and gives them the tools to do so, offering a wealth of information on recent trends and the outlook for water resource use in agriculture.
Author :Giordano, Meredith Publisher :Colombo, Sri Lanka: International Water Management Institute (IWMI) Washington, DC, USA: The World Bank ISBN 13 :9290908483 Total Pages :58 pages Book Rating :4.2/5 (99 download)
Book Synopsis 9789290908487 by : Giordano, Meredith
Download or read book 9789290908487 written by Giordano, Meredith and published by Colombo, Sri Lanka: International Water Management Institute (IWMI) Washington, DC, USA: The World Bank. This book was released on 2017-06-01 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Water Management in Irrigated Rice by : B. A. M. Bouman
Download or read book Water Management in Irrigated Rice written by B. A. M. Bouman and published by Int. Rice Res. Inst.. This book was released on 2007 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Pillar Of Sand written by Sandra Postel and published by W. W. Norton & Company. This book was released on 1999-07-06 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Pillar of Sand points the way toward protecting rivers and vital ecosystems even as we aim to produce enough food for a projected 8 billion people by the year 2030. Postel shows how innovative irrigation technologies and strategies can alleviate hunger and environmental stress at the same time. And she calls for a new ethic of sufficiency and sharing in response to impending water limits."--BOOK JACKET.
Book Synopsis Soybean Physiology, Agronomy, and Utilization by : A.G. Norman
Download or read book Soybean Physiology, Agronomy, and Utilization written by A.G. Norman and published by Elsevier. This book was released on 2012-12-02 with total page 263 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soybean Physiology, Agronomy, and Utilization attempts to cover and treat in logical sequence the factors that contribute to the potential and versatility of soybeans. The soybean is a major crop plant in the United States. Based on the utilization of the bean, or products therefrom, a substantial soybean industry has also developed. Its uses, agricultural and industrial, primarily depend on the high content of both protein (ca. 40%) and oil (ca. 20%) in the bean. The book begins by discussing soybean production in the United States and worldwide; the uses and economics of soybean products; and the soybean in physiological research. It explains the growth and development of soybeans. It discusses the physiological processes responsible for assimilating the plant body from the environment, namely photosynthesis, nitrogen fixation, and nitrate reduction. Subsequent chapters examine the impact of environmental variables—such as light, temperature, water, wind, and pests—on soybean plant characteristics as well as soybean breeding, production, processing, and utilization.
Download or read book Bibliography of Agriculture written by and published by . This book was released on 1996 with total page 2372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis More Crop Per Drop by : Meredith Giordano
Download or read book More Crop Per Drop written by Meredith Giordano and published by IWA Publishing. This book was released on 2007-01-01 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume is an analytical summary and a critical synthesis of research at the International Water Management Institute over the past decade under its evolving research paradigm known popularly as 'more crop per drop'. The research synthesized here covers the full range of issues falling in the larger canvas of water-food-health-environment interface. Besides its immediate role in sharing knowledge with the research, donor, and policy communities, this volume also has a larger purpose of promoting a new way of looking at the water issues within the broader development context of food, livelihood, health and environmental challenges. More crop per drop: Revisiting a research paradigm contrasts the acquired wisdom and fresh thinking on some of the most challenging water issues of our times. It describes new tools, approaches, and methodologies and also illustrates them with practical application both from a global perspective and within the local and regional contexts of Asia and Africa. Since this volume brings together all major research works of IWMI, including an almost exhaustive list of citations, in one single set of pages, it is very valuable not only as a reference material for researchers and students but also as a policy tool for decision-makers and development agencies.
Book Synopsis Guideline for Salinity Assessment, Mitigation and Adaptation Using Nuclear and Related Techniques by : Mohammad Zaman
Download or read book Guideline for Salinity Assessment, Mitigation and Adaptation Using Nuclear and Related Techniques written by Mohammad Zaman and published by Springer. This book was released on 2018-11-28 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: This open access book is an outcome of the collaboration between the Soil and Water Management & Crop Nutrition Section, Joint FAO/IAEA Division of Nuclear Techniques in Food and Agriculture, Department of Nuclear Sciences and Applications, International Atomic Energy Agency (IAEA), Vienna, Austria, and Dr. Shabbir A Shahid, Senior Salinity Management Expert, Freelancer based in United Arab Emirates.The objective of this book is to develop protocols for salinity and sodicity assessment and develop mitigation and adaptation measures to use saline and sodic soils sustainably. The focus is on important issues related to salinity and sodicity and to describe these in an easy and user friendly way. The information has been compiled from the latest published literature and from the authors’ publications specific to the subject matter. The book consists of six chapters. Chapter 1 introduces the terms salinity and sodicity and describes various salinity classification systems commonly used around the world. Chapter 2 reviews global distribution of salinization and socioeconomic aspects related to salinity and crop production. Chapters 3 covers comprehensively salinity and sodicity adaptation and mitigation options including physical, chemical, hydrological and biological methods. Chapter 4 discusses the efforts that have been made to demonstrate the development of soil salinity zones under different irrigation systems. Chapter 5 discusses the quality of irrigation water, boron toxicity and relative tolerance to boron, the effects of chlorides on crops. Chapter 6 introduces the role of nuclear techniques in saline agriculture.
Book Synopsis Drought and Nitrogen Effects on Maize Canopy Temperature and Stress Indices by : David A. Carroll (II)
Download or read book Drought and Nitrogen Effects on Maize Canopy Temperature and Stress Indices written by David A. Carroll (II) and published by . This book was released on 2015 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increased water scarcity due to changing climate, population growth, and economic development is a major threat to the sustainability of irrigated agriculture in the Western United States and other regions around the world. Management practices, such as controlled deficit irrigation, that seek to maximize the productivity of a limited water supply are critical. When using controlled deficit irrigation, remote sensing of crop canopy temperature is a useful tool for assessing crop water status and for more precise irrigation management. However, there is potential that nutrient deficiencies could compound the interpretation of water status from leaf temperature by altering leaf color and radiation balance. One objective of this thesis was to evaluate whether nitrogen fertility status of maize interacts was remotely sensed leaf temperature under full and limited irrigation. Another objective was to evaluate the effect of temperature under full and limited irrigation. Another objective was to evaluate the effect of varying irrigation and nitrogen regimes on three water stress indices: Crop Water Stress Index (CWSI), Degrees Above Non-Stressed (DANS), and Degrees Above Canopy Threshold (DACT). Replicated studies were conducted using maize grown in both the glasshouse and the field. The glasshouse study consisted of combinations of well-watered and drought irrigations and sufficient and deficient nitrogen levels, while the field study consisted of combinations of well-watered, limited or controlled deficit, and drought irrigation and sufficient, sufficient delayed, watered, limited or controlled deficit, and drought irrigation and sufficient, sufficient delayed, and deficient nitrogen levels. In the glasshouse, leaf chlorophyll content was reduced moderately by limited irrigation and more so by N deficiency. For most observations in the glasshouse, the remotely sensed leaf temperatures were affected by irrigation, but not by N level. With draught irrigation, leaf temperature averaged 29.0 C, compared to 27.9 C for the well-watered treatment. Similar results were observed in the field, illustrating the utility of canopy temperature in detecting water stress and that the measurement was not confounded by N status. It was also found that irrigation had a significant effect on all three water stress indices. For example, in the glasshouse, cumulative DANS was 32.2 for the drought treatment and 15.5 for the well-watered treatment. Similar results were found for other stress index measurements both in the glasshouse and the field. DANS underestimated stress on days when the reference crop was stressed and overestimated stress on low temperature days. DACT risks finding no stress when temperatures are below the canopy threshold temperature of 28.0 C. Thus, CWSI in the most effective index, given that it takes humidity and air temperature into account. Indices were only weakly related to leaf area, biomass or grain yield, or crop water productivity. Linear regression of Nitrogen Sufficiency Index and its effect on crop growth found significant effects on biomass and grain yield, crop water productivity, and final leaf area. Thus, water stress indices are useful tools in evaluating crop water status, but consideration of other factors, such as nutrient status, must be taken for prediction of crop growth and yield.
Book Synopsis Solute Movement in the Soil-root System by : Peter Hague Nye
Download or read book Solute Movement in the Soil-root System written by Peter Hague Nye and published by Univ of California Press. This book was released on 1977 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Food and Agriculture Organization of the United Nations Publisher :Food & Agriculture Org. ISBN 13 :9789251047682 Total Pages :116 pages Book Rating :4.0/5 (476 download)
Book Synopsis Deficit Irrigation Practices by : Food and Agriculture Organization of the United Nations
Download or read book Deficit Irrigation Practices written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 2002 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
