Response of Crops to Limited Water

Response of Crops to Limited Water
Author: Lajpat Ahuja
Publisher: ASA-CSSA-SSSA
Total Pages: 456
Release: 2008
Genre: Science
ISBN: 9780891181675

Water stress and heat stress are considered to be two primary factors that limit crop production in many parts of the world. Global warming appears to be increasing the water requirements of plants. Understanding the impact of water deficit on plant physiological processes and efficient water management are of great concern in maintaining food production to meet ever increasing world food demand. The book addresses various climatic soil and plant factors that contribute to the water use efficiency in plants subjected to water stress. It covers all issues related to soil, plant and climatic factors that contribute to the crop responses to water stress. The books advances the knowledge in improving and sustaining crop yields in ever increasing unpredictable climatic fluctuations This book uses crop simulation models for response of crops to limited water under various management and climatic conditions.

Modelling Potential Crop Growth Processes

Modelling Potential Crop Growth Processes
Author: J. Goudriaan
Publisher: Springer Science & Business Media
Total Pages: 247
Release: 2012-12-06
Genre: Science
ISBN: 9401107505

We dedicate this book to professor C. T. de Wit (1924 - 1993) who initiated Production Ecology as a school of thought at the Wageningen Agricultural Univer sity (see Rabbinge et at. , 1990). To acknowledge the leading role of C. T. de Wit, a recently formed graduate school at this university in Production Ecology was named after him. Production Ecology is the study of ecological processes, with special attention to flows of energy and matter as factors that determine the productivity of ecological systems. Agro-ecosystems are a special case of ecosystems which are much better suited for the productivity approach than natural ecosystems are. This is the reason for the strong role of agricultural research in production ecology. On the other hand, it must be recognized that the spatial heterogeneity of natural ecosys tems and their species richness may alter some ecophysiological relationships. However, the basic physical, chemical and physiological processes will be the same. De Wit introduced the state variable approach as the basis for simulation mod elling. In this approach the floating character of nature is schematized into a series of snapshots over time in which the states are frozen at each separate moment. The current state determines how the rates of change will lead to the next snapshot. This way of thinking enables a clear and workable representation of interacting simul taneous processes, without compromising on the mathematics.

Photosynthesis of Leaf Canopies

Photosynthesis of Leaf Canopies
Author: Cornelis Teunis de Wit
Publisher:
Total Pages: 68
Release: 1965
Genre: Leaves
ISBN:

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.

Understanding Options for Agricultural Production

Understanding Options for Agricultural Production
Author: G.Y. Tsuji
Publisher: Springer Science & Business Media
Total Pages: 405
Release: 2013-03-14
Genre: Science
ISBN: 9401736243

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.

Simulation of Plant Growth and Crop Production

Simulation of Plant Growth and Crop Production
Author: F. W. T. Penning de Vries
Publisher:
Total Pages: 332
Release: 1982
Genre: Agriculture
ISBN:

Een introduktie in het ontwikkelen van computerprogramma's voor modellen van de plantengroei door dynamische simulatie. Het bestrijkt de disciplines gewasfysiologie, gewas-micrometeorologie, bodemfysica, bodemmicrobiologie en plantenziektekunde. Verschillende hoofdstukken zijn gebaseerd op onderwijsprogramma's van de Vakgroep Theoretische Teeltkunde van de Landbouwhogeschool Wageningen en zijn voorzien van oefeningen.

Mathematical Models of Crop Growth and Yield

Mathematical Models of Crop Growth and Yield
Author: Allen R. Overman
Publisher: CRC Press
Total Pages: 341
Release: 2002-08-27
Genre: Technology & Engineering
ISBN: 0824743598

Highlighting effective, analytical functions that have been found useful for the comparison of alternative management techniques to maximize water and nutrient resources, this reference describes the application of viable mathematical models in data analysis to increase crop growth and yields. Featuring solutions to various differential equations, the book covers the characteristics of the functions related to the phenomenological growth model. Including more than 1300 literature citations, display equations, tables, and figures and outlining an approach to mathematical crop modeling, Mathematical Models of Crop Growth and Yield will prove an invaluable resource.

Modeling and Control of Greenhouse Crop Growth

Modeling and Control of Greenhouse Crop Growth
Author: Francisco Rodríguez
Publisher: Springer
Total Pages: 275
Release: 2014-11-01
Genre: Technology & Engineering
ISBN: 3319111345

A discussion of challenges related to the modeling and control of greenhouse crop growth, this book presents state-of-the-art answers to those challenges. The authors model the subsystems involved in successful greenhouse control using different techniques and show how the models obtained can be exploited for simulation or control design; they suggest ideas for the development of physical and/or black-box models for this purpose. Strategies for the control of climate- and irrigation-related variables are brought forward. The uses of PID control and feedforward compensators, both widely used in commercial tools, are summarized. The benefits of advanced control techniques—event-based, robust, and predictive control, for example—are used to improve on the performance of those basic methods. A hierarchical control architecture is developed governed by a high-level multiobjective optimization approach rather than traditional constrained optimization and artificial intelligence techniques. Reference trajectories are found for diurnal and nocturnal temperatures (climate-related setpoints) and electrical conductivity (fertirrigation-related setpoints). The objectives are to maximize profit, fruit quality, and water-use efficiency, these being encouraged by current international rules. Illustrative practical results selected from those obtained in an industrial greenhouse during the last eight years are shown and described. The text of the book is complemented by the use of illustrations, tables and real examples which are helpful in understanding the material. Modeling and Control of Greenhouse Crop Growth will be of interest to industrial engineers, academic researchers and graduates from agricultural, chemical, and process-control backgrounds.

Advances in Crop Modelling for a Sustainable Agriculture

Advances in Crop Modelling for a Sustainable Agriculture
Author: Kenneth Boote
Publisher: Burleigh Dodds Series in Agric
Total Pages: 420
Release: 2019-10-22
Genre: Technology & Engineering
ISBN: 9781786762405

Crop modelling has huge potential to improve decision making in farming. This collection reviews advances in next-generation models focused on user needs at the whole farm system and landscape scale.

Agricultural Systems Modeling and Simulation

Agricultural Systems Modeling and Simulation
Author: Robert M. Peart
Publisher: CRC Press
Total Pages: 716
Release: 1997-09-16
Genre: Technology & Engineering
ISBN: 9780824700416

Offers a treatment of modern applications of modelling and simulation in crop, livestock, forage/livestock systems, and field operations. The book discusses methodologies from linear programming and neutral networks, to expert or decision support systems, as well as featuring models, such as SOYGRO, CROPGRO and GOSSYM/COMAX. It includes coverage on evaporation and evapotranspiration, the theory of simulation based on biological processes, and deficit irrigation scheduling.