Pedogenetic And Induced Compaction In Agricultural Soils
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Pedogenetic And Induced Compaction In Agricultural Soils
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Author : G. R. Saini
language : en
Publisher:
Release Date : 2012
Pedogenetic And Induced Compaction In Agricultural Soils written by G. R. Saini and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.
Compaction Of Agricultural Soils
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Author : Kenneth Kirkland Barnes
language : en
Publisher:
Release Date : 1971
Compaction Of Agricultural Soils written by Kenneth Kirkland Barnes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Crops categories.
The soil compaction process; Methods of measuring soil compaction; Forces causing soil compaction; Compaction as it affects soil conditions; Soil conditions as they affect plant establishment, root development and yield; Effect of tillage on soil compaction; Management factors and natural forces as related to compaction; Economic assessment of soil compaction.
Soil Compaction In Crop Production
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Author : B.D. Soane
language : en
Publisher: Elsevier
Release Date : 2013-10-22
Soil Compaction In Crop Production written by B.D. Soane and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Technology & Engineering categories.
This book provides a global review of the mechanisms, incidence and control measures related to the problems of soil compaction in agriculture, forestry and other cropping systems. Among the disciplines which relate to this subject are soil physics, soil mechanics, vehicle mechanics, agricultural engineering, plant physiology, agronomy, pedology, climatology and economics. The volume will be of great value to soil scientists, agricultural engineers, and all those involved with irrigation, drainage and tillage. It will help to facilitate the exchange of information on current work throughout the world, as well as to promote scientific understanding and stimulate the development, evaluation and adoption of practical solutions to these widespread and urgent problems.
Machinery Induced Compaction Of Arable Soils
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Author : Inge Håkansson
language : en
Publisher:
Release Date : 2004
Machinery Induced Compaction Of Arable Soils written by Inge Håkansson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
Annotated Bibliography On Soil Compaction
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Author : American Society of Agricultural Engineers. Soil Compaction Committee
language : en
Publisher:
Release Date : 1958
Annotated Bibliography On Soil Compaction written by American Society of Agricultural Engineers. Soil Compaction Committee and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Soil stabilization categories.
Soil Compaction And The Compactibility Of Cultivated Agricultural Soils
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Author : Austin Charles Job Sichinga
language : en
Publisher:
Release Date : 1989
Soil Compaction And The Compactibility Of Cultivated Agricultural Soils written by Austin Charles Job Sichinga and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Agricultural machinery categories.
Soil Compaction On Forest And Range Lands
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Author : Howard William Lull
language : en
Publisher:
Release Date : 1959
Soil Compaction On Forest And Range Lands written by Howard William Lull and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Soil stabilization categories.
The purpose of this report is to review available information on soil compaction as related to soil and water conservation on forest and range lands.
Soil Compaction Caused By Heavy Agricultural Machinery
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Author : W. Gruber
language : en
Publisher:
Release Date : 1991
Soil Compaction Caused By Heavy Agricultural Machinery written by W. Gruber and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1991 with categories.
Subsoil Compaction
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Author : Rainer Horn
language : en
Publisher:
Release Date : 2000
Subsoil Compaction written by Rainer Horn and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with Soil compaction categories.
Teory; Modelling; Properties; Distribution; Methods.
Root Induced Compaction And Its Effects On Soil Microstructure And Soil Hydraulic Properties Using X Ray Micro Tomography And Numerical Simulations
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Author : Jazmín Estefanía Aravena Ibáñez
language : en
Publisher:
Release Date : 2011
Root Induced Compaction And Its Effects On Soil Microstructure And Soil Hydraulic Properties Using X Ray Micro Tomography And Numerical Simulations written by Jazmín Estefanía Aravena Ibáñez and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with Electronic books categories.
Soil is a challenging environment where resources, such as water, nutrients and air, are scarce and patchy. Plants and soil microorganisms have limited ability to move toward nutrient-enriched zones, compared with animals. Plants and roots have evolved to adapt and influence their physical environment as a way to create favorable conditions for its development. On the other hand, the structure of the soil controls its ability to receive, store and transmit water, to cycle carbon and nutrients, and to disperse anthropogenic and natural contaminants. As roots grow, soil structure changes; the pressure exerted produces a decrease in soil porosity and an increase in soil density, creating complex soil-root interactions. The scales of interest in the study of soil structure range from angstroms to kilometers. To study processes such as plant growth, root penetration, storage of water, and movement of nutrients, the most relevant scales range from microns to centimeters. Recent advances in X-ray micro-tomography (XMT) imaging have allowed the study of rhizosphere on spatial scale hitherto unreachable. This dissertation investigates utilization of XMT to study root-induced compaction on soil micro-structure and its effect on soil hydraulic properties. The current state of the art in soil-plant-root interactions using XMT is presented. Techniques to improve sensitivity of XMT images when roots are being scanned, are discussed. Feasibility of various segmentation techniques and examples of their use to quantify soil properties are addressed. XMT data quantification is then used in the study to feed numerical flow models. At bulk-scale, soil compaction has been associated with decrease in porosity and hydraulic conductivity and thus a reduction in soil productivity and fertility. However, at the aggregate scale, this study shows that natural root-induced compaction increases contact areas between aggregates, which may lead to an increase in unsaturated hydraulic conductivity of the soil adjacent to the roots. An analytical model to estimate the effect aggregate compaction on its effective hydraulic conductivity was developed. It was found that the effective hydraulic conductivity of a pair of aggregates, undergoing uniaxial stress, increased following a non-linear relationship as inter-aggregate contact area increased. Additionally, this study presents numerical modeling using actual XMT images of aggregated soil around a root surrogate to demonstrate how root-induced deformation increases unsaturated water flow towards the root, providing insight into the growth and water uptake patterns of roots in natural soils. Finally, this study presents a novel procedure that allowed coupling mechanical induced compaction with fluid flow simulation to model root-induced compaction in the rhizosphere. XMT images were used to describe in detail the rhizosphere microstructure. Then, finite element simulations were used to study the effect of an expanding root on root water uptake. The effect of increase aggregate connectivity, increase in effective hydraulic conductivity, root-soil contact area, and increase in local and global hydraulic gradient were evaluated. These results contribute to a better understanding of soil-waterroot interactions.