Author: Walter ArndtPublisher:
ISBN:
Category : Plant-soil relationships
Languages : en
Pages : 8
Book Description
Soil Surface Sealing (crusting) Investigations
Author: Walter ArndtPublisher:
ISBN:
Category : Plant-soil relationships
Languages : en
Pages : 8
Book Description
Soil Surface Sealing and Crusting
Author: Nearing. M. A.Soil Crusting Chemical & Physical Processes
Author: Malcolm E. SumnerPublisher: Springer
ISBN:
Category : Nature
Languages : en
Pages : 394
Book Description
Assessment of Soil Surface Sealing and Crusting
Author: F. CallebautPublisher:
ISBN:
Category : Clay soils
Languages : en
Pages : 442
Book Description
Soil Surface Sealing and Crusting
Author: J. W. A. PoesenPublisher:
ISBN:
Category : Soil absorption and adsorption
Languages : en
Pages : 158
Book Description
Physical and Morphological Investigations of Surface Seal Formation on Selected Soils
Author: Clark James GantzerInterpretation of Micromorphological Features of Soils and Regoliths
Author: Georges StoopsPublisher: Elsevier
ISBN: 0444635424
Category : Science
Languages : en
Pages : 1002
Book Description
Interpretation of Micromorphological Features of Soils and Regoliths, Second Edition, provides researchers and students with a tool for interpreting features observed in soil thin sections and through submicroscopic studies. After an introduction and general overview, micromorphological aspects of regoliths (e.g., saprolites, transported materials) are highlighted, followed by a systematic and coherent discussion of the micromorphological expression of various pedogenic processes. The book is written by an international team of experts in the field, using a uniform set of concepts and terminology, making it a valuable interdisciplinary reference work. The following topics are treated: freeze-thaw features, redoximorphic features, calcareous and gypsiferous formations, textural features, spodic and oxic horizons, volcanic materials, organic matter, surface horizons, laterites, surface crusts, salt minerals, biogenic and pedogenic siliceous materials, other authigenic silicates, phosphates, sulphidic and sulphuric materials, and features related to faunal activity. The last chapters address anthropogenic features,archaeological materials and palaeosoils. - Updates the first exhaustive publication on interpretation of micromorphological features, with some new chapters and with a larger number of additional references - Covers related topics, making micromorphology more attractive and accessible for geomorphologists, archaeologists and quaternary geologists Includes thematic treatment of a range of soil micromorphology fields and broadens its applications - Features input from a multi-disciplinary team, ensuring thorough coverage of topics related to soil science, archaeology and geomorphology
Soil Crusts and Their Effect on Gaseous Diffusion
Author: Charles Wilson DombyPublisher:
ISBN:
Category : Diffusion
Languages : en
Pages : 224
Book Description
The Energetics and Dynamics of Surface Sealing, a Laboratory Investigation
Author: Richard Michael HawkePublisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Understanding the controls on the components of the hydrologic cycle is important for maintaining environmental quality since soil plays an important role in the hydrologic cycle by influencing the timing of and the path taken by water once it reaches the land surface. Surface seals formed under rainfall have been recognised to occur on soils from all over the world and are known to reduce infiltration and increase surface runoff; however, measurements of hydraulic conductivity during a rainfall event have not been possible. Calculations of hydraulic conductivity require measurements of soil water content and soil water potential. Consequently, this thesis involves the design of systems to measure these variables at the appropriate time and length scales. Column experiments using a silt loam from southern Ontario were conducted to examine how two previously identified controls upon surface sealing; antecedent moisture conditions and rainfall characteristics, affect the soil hydraulic conductivity. Even at very small length scales, of the order millimetres, textural variations were evident from the soil water content-time plots. Thus, even at very small length scales it seems inappropriate to assume a uniform soil water content. The temporal changes in the hydraulic conductivity were found to be an exponential function of changes in the soil water potential. The relationship between the final hydraulic conductivity and the applied rainfall varied with initial soil water content. At lower rainfall intensities a smooth hydraulic conductivity-soil water potential was observed that was unaffected by the initial soil water content. However, this relationship was disrupted towards the end of the higher intensity rainfall events due to disruption of the soil structure. A van Genuchten model (van Genuchten, 1980) could be fitted with a high degree of accuracy to the measured soil water content-soil water potential data. When the parameters of the fitted curve were used to model the unsaturated hydraulic conductivity function, the fit between this function and the measured hydraulic conductivity values was extremely poor.
Methods for Assessment of Soil Degradation
Author: Rattan LalPublisher: CRC Press
ISBN: 1000098974
Category : Science
Languages : en
Pages : 573
Book Description
Soil degradation has serious global impacts on agronomic, economic, and sociopolitical conditions, however, statistics regarding the degree of these impacts has been largely unreliable. This book aims to standardize the methodology for obtaining reliable and objective data on soil degradation. It will also identify and develop criteria for assessing the severity of soil degradation, providing a realistic scenario of the problem.