Author: Ian J. Smalley
Publisher:
ISBN:
Category : Fragipan
Languages : en
Pages : 130

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Book Description

Author: United States. Soil Conservation Service
Publisher:
ISBN:
Category : Soil structure
Languages : en
Pages : 16

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Book Description

Author: Nico van Breemen
Publisher: Springer
ISBN: 0585317887
Category : Nature
Languages : en
Pages : 376

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Book Description
Soils form a unique and irreplaceable essential resource for all terrestrial organisms, including man. Soils form not only the very thin outer skin of the earth's crust that is exploited by plant roots for anchorage and supply of water and nutrients. Soils are complex natural bodies formed under the influence of plants, microorganisms and soil animals, water and air from their parent material, i.e. solid rock or unconsolidated sediments. Physically, chemically and mineralogically they usually differ strongly from the parent material, and normally are far more suitable as a rooting medium for plants. In addition to serving as a substrate for plant growth, including crops and pasture, soils play a dominant role in the biogeochemical cycling of water, carbon, nitrogen and other elements, influencing the chemical composition and turnover rates of substances in the atmosphere and the hydrosphere. Soils take decades to millennia to form. We tread on them and do not usually see their interior, so we tend to take them for granted. But improper and abusive agricultural management, careless land- clearing and reclamation, man-induced erosion, salinisation and acidification, desertification, air- and water pollution, and withdrawal of land for housing, industry and transportation now destroy soils more rapidly than they can be formed.

Author: N. E. Smeck
Publisher:
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 178

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Book Description
Identification, role in Soil Taxonomy, and Worldwide distribution of Fragipans; Fragipans in the Northeastern United States; Occurrence and characteristics of Fragipans on the Coastal plains of the Southeastern United States; Fragipan distribution in the south Central States; Fragipan formation in Loess of the Midwestern United States; Weathering discontinuities: a key to fragipan formation; Solution chemistry of fragipans-thermodynamic approach to understanding fragipan formation; Physical processes of fragipan formation.

Author: Walter Henry Lyford
Publisher:
ISBN: 9789138016794
Category : Fragipans
Languages : en
Pages : 21

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Book Description

Author: Georges Stoops
Publisher: Elsevier
ISBN: 0444635424
Category : Science
Languages : en
Pages : 1002

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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

Author: Beth Nicole Weisenborn
Publisher:
ISBN:
Category : Fragipans
Languages : en
Pages : 202

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Book Description

Author: Gerald W. Olson
Publisher:
ISBN:
Category :
Languages : en
Pages : 322

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Book Description

Author: Carlos A. Gauggel
Publisher:
ISBN:
Category : Loess
Languages : en
Pages : 436

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Book Description

Author: Agriculture Department
Publisher: Government Printing Office
ISBN: 9780160923210
Category : Soils
Languages : en
Pages : 372

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Book Description
This publication, Keys to Soil Taxonomy, Twelfth Edition, 2014, coincides with the 20th World Congress of Soil Science, to be held on Jeju Island, Korea in June 2014. The Keys to Soil Taxonomy serves two purposes. It provides the taxonomic keys necessary for the classification of soils in a form that can be used easily in the field. It also acquaints users of soil taxonomy with recent changes in the classification system. The twelfth edition of the Keys to Soil Taxonomy incorporates all changes approved since the publication in 1999 of the second edition of Soil Taxonomy: A Basic System of Soil Classification for Making and Interpreting Soil Surveys.