Mathematical Models of Large Watershed Hydrology
Mathematical Models of Large Watershed Hydrology

Author: Vijay P. Singh

Publisher: Water Resources Publication

Published: 2002

Total Pages: 930

ISBN-13: 9781887201346

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Comprehensive account of some of the most popular models of large watershed hydrology ~~ of interest to all hydrologic modelers and model users and a welcome and timely edition to any modeling library

Modelling water and nutrient dynamics in soil-crop systems
Modelling water and nutrient dynamics in soil-crop systems

Author: K.Ch. Kersebaum

Publisher: Springer Science & Business Media

Published: 2007-05-10

Total Pages: 270

ISBN-13: 1402044798

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This book contains articles from a workshop on the modeling of water and nutrient dynamics in crop-soil systems. Data sets from lysimeters and experimental fields of multiyear crop rotations were provided for modelers. A unique data set is provided of a 100-year, long-term field experiment into crop yield and organic carbon development under different management systems. The book includes a detailed description of data sets which can be used by modelers and the papers describe the applications of 18 different modeling approaches.

Understanding Options for Agricultural Production
Understanding Options for Agricultural Production

Author: G.Y. Tsuji

Publisher: Springer Science & Business Media

Published: 2013-03-14

Total Pages: 405

ISBN-13: 9401736243

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The first premise of this book is that farmers need access to options for improving their situation. In agricultural terms, these options might be manage ment alternatives or different crops to grow, that can stabilize or increase household income, that reduce soil degradation and dependence on off-farm inputs, or that exploit local market opportunities. Farmers need a facilitating environment, in which affordable credit is available if needed, in which policies are conducive to judicious management of natural resources, and in which costs and prices of production are stable. Another key ingredient of this facilitating environment is information: an understanding of which options are viable, how these operate at the farm level, and what their impact may be on the things that farmers perceive as being important. The second premise is that systems analysis and simulation have an impor tant role to play in fostering this understanding of options, traditional field experimentation being time-consuming and costly. This book summarizes the activities of the International Benchmark Sites Network for Agrotechnology Transfer (IBSNAT) project, an international initiative funded by the United States Agency for International Development (USAID). IBSNAT was an attempt to demonstrate the effectiveness of understanding options through systems analysis and simulation for the ultimate benefit of farm households in the tropics and subtropics. The idea for the book was first suggested at one of the last IBSNAT group meetings held at the University of Hawaii in 1993.

Applications of Systems Approaches at the Field Level
Applications of Systems Approaches at the Field Level

Author: M.J. Kropff

Publisher: Springer Science & Business Media

Published: 2013-11-11

Total Pages: 463

ISBN-13: 9401707545

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Systems approaches for agricultural development are needed to determine rational strategies for the role of agriculture in national development. Mathematical models and computer simulation provide objective tools for applying science to determine and evaluate options for resource management at field, farm and regional scales. However, these tools would not be fully utilizable without incorporating social and economic dimensions into their application. The second international symposium, Systems Approaches for Agricultural Development (SAAD), held in Los Baños, 6-8 December 1995, fostered this link between the biophysical sciences and the social sciences in the selection of keynote papers and oral presentations, a selection of which are included in these books. The contents further reflect how systems approaches have definitely moved beyond the research mode into the application mode. The large number and high quality of interdisciplinary research projects reported from different parts of the globe, to determine land use options that will meet multiple goals and yet sustain natural resource bases, is a key indicator of this `coming of age'. At the farm level, where trade-off decisions between processes and products (commodities) feature strongly, much progress is also evident in the development of systems-based tools for decision making. At the field level optimization of resource use and minimizing environmental effects has become of major concern for which systems approaches are indispensable. The books, of which Volume I deals with regional and farm studies level and Volume II with field level studies, will be of particular interest to all agricultural scientists and planners, as well as students interested in multidisciplinary and holistic approaches to agricultural development.

Encyclopedia of Ecology
Encyclopedia of Ecology

Author: Brian D. Fath

Publisher: Elsevier

Published: 2018-08-23

Total Pages: 2786

ISBN-13: 0444641300

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Encyclopedia of Ecology, Second Edition, Four Volume Set continues the acclaimed work of the previous edition published in 2008. It covers all scales of biological organization, from organisms, to populations, to communities and ecosystems. Laboratory, field, simulation modelling, and theoretical approaches are presented to show how living systems sustain structure and function in space and time. New areas of focus include micro- and macro scales, molecular and genetic ecology, and global ecology (e.g., climate change, earth transformations, ecosystem services, and the food-water-energy nexus) are included. In addition, new, international experts in ecology contribute on a variety of topics. Offers the most broad-ranging and comprehensive resource available in the field of ecology Provides foundational content and suggests further reading Incorporates the expertise of over 500 outstanding investigators in the field of ecology, including top young scientists with both research and teaching experience Includes multimedia resources, such as an Interactive Map Viewer and links to a CSDMS (Community Surface Dynamics Modeling System), an open-source platform for modelers to share and link models dealing with earth system processes

Photosynthesis of Leaf Canopies
Photosynthesis of Leaf Canopies

Author: Cornelis Teunis de Wit

Publisher:

Published: 1965

Total Pages: 68

ISBN-13:

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The development of a procedure to calculate the effect of certain environmental factors on the rate of photo-synthesis imposed mainly geometrical problems, which were solved in such a way that the actual calculation could be carried out by means of a computer. The calculation procedures have been used to study the. relative importance of the variables under various conditions. The results for a standard set of conditions, have been summarized in order to make it possible to estimate the daily photosynthesis at any time and place for a wide range of photosynthesis functions without a computer.

Societal Impacts on Information Systems Development and Applications
Societal Impacts on Information Systems Development and Applications

Author: Wang, John

Publisher: IGI Global

Published: 2012-04-30

Total Pages: 401

ISBN-13: 1466609281

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"This book has collected research from experts from around the world in a variety of sectors, in the form of case studies, frameworks, architectures, methodologies, and best practices to show the latest societal impacts on information systems development in its various applications"--Provided by publisher.