Soil Dynamics In Tillage And Traction
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Soil Dynamics In Tillage And Traction
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Author : William R. Gill
language : en
Publisher:
Release Date : 1967
Soil Dynamics In Tillage And Traction written by William R. Gill and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Electronic books categories.
Soil Dynamics In Tillage And Traction
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Author : William R. Gill
language : en
Publisher:
Release Date : 1967
Soil Dynamics In Tillage And Traction written by William R. Gill and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1967 with Soil dynamics categories.
Soil Dynamics In Tillage And Traction Usda Agricultural Handbook
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Author :
language : en
Publisher:
Release Date : 2001
Soil Dynamics In Tillage And Traction Usda Agricultural Handbook written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Soil Cutting And Tillage
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Author : E. McKyes
language : en
Publisher: Elsevier
Release Date : 1985-10-01
Soil Cutting And Tillage written by E. McKyes and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985-10-01 with Technology & Engineering categories.
After giving a brief history of tillage practices and implements used throughout the world dating back to ancient times, this book goes on to describe the basic soil mechanics techniques needed to calculate the forces developed in soil by simple-shaped cutting tools. The methods of measuring soil mechanical properties, water pressure in soil and shear rate effects are touched upon. A review is given of two and three dimensional soil cutting mathematical mechanics models to predict soil cutting forces and soil volumes disturbed by cutting and tillage tools, as well as the state-of-the-art of soil loosening, structural rearrangement and plant growth as affected by tillage tools. The author also includes an introduction to the analysis of traction machines. There are many numerical examples of mechanical analyses and predictions worked out in the various sections of the book as well as numerous unsolved problems at the end of a number of the chapters. Written in a textbook style, this monograph is ideal for anyone wanting to learn modern techniques for the mechanical description of soil cutting and tillage forces and soil volumes disturbed. It also provides a reference for analytical formulae and calculated force forces. It will be of interest to universities and colleges worldwide which have Agricultural Engineering Programs, Civil and Mechanical Engineering schools which specialize in soil mechanics and construction machinery as well as to research stations worldwide with interests in soil tillage, soil physics etc.
Advances In Soil Dynamics
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Author :
language : en
Publisher:
Release Date : 2009
Advances In Soil Dynamics written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with Soil dynamics categories.
Mechanics And Related Processes In Structured Agricultural Soils
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Author : W.E. Larson
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Mechanics And Related Processes In Structured Agricultural Soils written by W.E. Larson 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 2012-12-06 with Nature categories.
Agricultural soils are subjected to many applied mechanical stresses that influence their behavior. Stresses arise from tillage machines, seeders and chemicals applicators, tractors, and equipment for harvest and transport. Applied stresses may compact or loosen the bulk soil. Micro sections of soil (aggregates or clods) may be compacted during tillage while the bulk soil is loosened. Because most granular soils are combined into structural units of varying sizes with different strengths and properties, prediction of the effect of stresses on the behavior of bulk soils is difficult. The basic strength properties of soil are determined by many fac tors: the size distribution of particles, chemical and mineralogical properties of inorganic clay fraction, the organic matter content and composition, the water content and the stress history. These factors combine and interact to produce many possible behavior patterns. Changes in structure of the soil from applied stresses and biologi cal reactions may profoundly influence storage and transmission of water, heat, and air, and the mechanical resistance to penetration by plant roots. They may also affect the traction of vehicles. Manipulation of structural properties of soils by tillage implements is a major cost under most crop production systems. Reduced energy use is also a significant conservation objective. Improved management systems are very dependent upon a better understanding of soils' response to applied stresses. The content of this book resulted from a NATO Advanced Research Workshop held in St. Paul, Minnesota, U.S.A. September 13-16, 1988.
Agriculture Handbook
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Author :
language : en
Publisher:
Release Date : 1949
Agriculture Handbook written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1949 with Agriculture categories.
Set includes revised editions of some issues.
Suggested Guide For The Use Of Insecticides To Control Insects Affecting Crops Livestock Households Stored Products And Forest Products
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Author : Frank Freese
language : en
Publisher:
Release Date : 1966
Suggested Guide For The Use Of Insecticides To Control Insects Affecting Crops Livestock Households Stored Products And Forest Products written by Frank Freese and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with Aerial photography categories.
Agricultural Engineering Soil Mechanics
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Author : E. McKyes
language : en
Publisher: Elsevier
Release Date : 2012-12-02
Agricultural Engineering Soil Mechanics written by E. McKyes and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-02 with Technology & Engineering categories.
This book provides an introduction to classical soil mechanics and foundation engineering, and applies these principles to agricultural engineering situations. Theoretical design formulae are given, plus tables and graphs dealing with bearing capacity factors, wall pressure factors, soil cutting numbers and soil mechanical properties. Many example problems of design and analysis are solved in the text, and there are unsolved problems given for each chapter. The text begins with descriptions of soil origins and classification systems, including agricultural classification schemes, and then introduces classical concepts of soil strength and strength measurement techniques in the laboratory and in the field. Soil mechanics is applied to the design of shallow foundations, and the design formulae as well as tables of bearing capacity factors for design use are provided. New research and design findings in the specialized area of tall and heavy farm silos are also given, in addition to deep pile foundation design for heavy structures on very soft soils. Water flow in soils is treated, together with stability of ditch bank slopes and small earth dams, design of retaining walls and pressure pressures in bins and silos, soil erosion and protection methods, soil cutting and tillage design methods, soil compaction analysis, the use of geotextiles and problems of soil freezing. The book is directed primarily at professional university students in Agricultural Engineering, but will also be of interest to scientists working in other engineering branches, landscape architecture, soil physics and the like.
Agricultural Soil Mechanics
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Author : A. J. Koolen
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Agricultural Soil Mechanics written by A. J. Koolen 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 2012-12-06 with Technology & Engineering categories.
Compared with forces occurring in soil mechanics problems in civil engineering, the forces that are applied to soil in farming operations generally have a short duration, less than a few seconds, a small loaded area, no more than a few square decimeters, and small intensities, 10 bar being a high value. On the other hand, soil properties vary widely between those of a weak mud and a stone-like dry soil. Tillage and related applications of force to soil are practiced worldwide in farming. Tillage operations are performed on one hectare of land for every three human beings. This means that for the food production for each individual daily, something like one cubic meter of soil is stirred, or about 20 times his body weight. Theoretical knowledge of this most common human activity, which largely determines the surface shape of the fertile part of the earth, is still very limited. In this book the authors have tried to give an outline of the present state of the art. One of the starting points was a course in soil dynamics taught by the authors at the Agricultural University at Wageningen, The Netherlands. We hope to reach interested readers who have no more theoretical knowledge than high school level, as well as readers who want to go beyond the level of a third year university student. For the chapter on wheels and tires we received substantial support from F. G. J. Tijink of the Tillage Laboratory at Wageningen.