, P. A., Palm, C. A., & Buol, S. W. 2003 . Fertility capability soil classification a tool to help ...Image Bodenart.jpg thumb Soil type s Soil classification deals with the systematic categorization of soil ... Soil classification is a dynamic subject, from the structure of the system itself, to the definitions of classes, and finally in the application in the field. Soil classification can be approached from the perspective of soil as a material and soil as a resource. Engineering Engineers, typically ... to allow an easy transition from field observations to basic predictions of soil engineering properties ... is the Unified Soil Classification System USCS . The USCS has three major classification groups 1 ... soils referred to as peat . The USCS further subdivides the three major soil classes for clarification. Other engineering soil classification systems in the States include the AASHTO Soil Classification ... ling burmister burmister.html . A full geotechnical engineering soil description will also include other properties of the soil including color, in situ moisture content, in situ strength, and somewhat more detail about the material properties of the soil than is provided by the USCS code. Soil science Image SoilTextureTriangle.jpg thumb right 320px Soil texture triangle showing the USDA classification system based on grain size For soil resources, experience has shown that a natural ... property soil morphology , behaviour, or pedogenesis genesis , results in classes that can ... so that interpretations do not vary widely. This is in contrast to a technical system approach to soil ... characteristics. Natural system approaches to soil classification, such as the French Soil Reference System R f rentiel p dologique fran ais are based on presumed soil genesis. Systems have developed, such as USDA soil taxonomy and the World Reference Base for Soil Resources , which use taxonomic criteria involving soil morphology and laboratory tests to inform and refine hierarchy hierarchical ... more details
Soil resilience refers to the ability of a soil to resist or recover their healthy state in response ... provides a discussion of soil resilience in the context of its formation and development over pedological time and what resilience means in terms of human expectations and practices. Overview Soil resilience should first be looked at in terms of soil formation and development pedogenesis , a continuous ... utilised, changed and depended directly on soil. Pedogenesis is the result of five factors the first two are parent material and topography, which are passive and contribute to soil mass and position the next two are climate and the biosphere, which are active and supply the energy in soil formation. Finally, there is time Paton, 1978 . It is the active factors in soil formation that vary ... millions of years the soil has endured varying atmospheric conditions including a complete absence of oxygen and associated behaviour of soil elements in a reducing environment, and the establishment ... the last ice age, though average climate has remained relatively stable, the soil has faced periods of extended wet, dry and fire. If soil were not resilient, then in the face of past influences ... we expect that the soil to remain constant to continue to provide the same environmental and commercial ...? Soil resilience the Australian context In Australia the above questions are relevant given the strong dependence on the soil, yet the significant degradation of soils over little more than 200 years ... soils as this is the essence of our existence states Baskin 1997 the maintenance of fertile soil is one ... of soil must be replenished constantly as plants consume soil elements and pass them up the food chain ... and commercial service, yet the practices applied have been unsustainable and have led to such soil ... point of our soils fertility, threats to the environment has continued to grow faster that the willingness ... impose on the soil in terms of biosphere direct human impacts included and climate constitute environmental ... more details
File Miami soil profile.jpg thumb 150px Miami soil profile The Miami soil series is the list of U.S. state soils state soil of Indiana . The less sloping Miami soils are used mainly for maize corn , soybeans , or winter wheat . The steeper areas are used as pasture , hay land, or woodland . Significant area has been converted to residential and commerce commercial land use use s. There are convert 794994 acre km2 0 of Miami soils soil survey mapped in Indiana. Miami pedogenesis soils formed in calcareous , loam y till on the Wisconsin glaciation Wisconsin Till Plains. The native vegetation is hardwood forest . Miami soils are fertilitysoil fertile and have a moderate available water capacity . Indiana is nationally ranked for agriculture agricultural production because of the highly productive Miami soils along with other prime farmland soils in the State. ref cite web url ftp ftp fc.sc.egov.usda.gov NSSC StateSoil Profiles in soil.pdf format PDF title Miami Indiana State Soil publisher USDA NRCS accessdate 2006 07 02 ref The Miami series consists of moderately well drained soils formed in as much as 18 inches 46 cm of loess or silt y granular material material and in the underlying loam y till on till plains. They are very deep soils that are moderately deep to dense till. permeability fluid Permeability is moderate or moderately slow in the solum , and slow or very slow in the underlying dense till. Slope ranges from 0 to 60 . Mean annual precipitation meteorology precipitation is 40 inches 1000 mm , and mean annual temperature is 52 F 11 C . Miami soils are soil classification classified in USDA soil taxonomy as fine loamy, mixed, active, mesic Oxyaquic ... regime Pedology soil study Soil types List of U.S. state soils References reflist Category Pedology Category Soil in the United States Category Geology of Indiana Category Symbols of Indiana Category Types of soilsoil sci stub ... more details
Orphan date January 2012 Soil Governance Soil Governance entails policies and strategies used, and the processes of decision making by nation states and local governments on how the soil is utilised. ref name Bonn2011 cite web last Bonn2011 first Conference title Sustainable Soil Governance Towards Integrated ... 6 hot topic issue paper soils for sustainable development.pdf ref Globally, governance of the soil ... populated regions on earth. The Global soil partnership initiated by the FAO Food and Agriculture ... change, ecosystem services in national and international soil policies. ref name FAO2011 cite web last Food and Agricultural Organisation first FAO title Global Soil Partnership url http www.fao.org rio20 special features the global soil partnership en ref Governing the soil requires international ... policies, soil is recognised as a non renewable resource, however its governance is maintained at a national ... cite web last Commission of the European Communities title Thematic Strategy for Soil Protection ... world, soil governance is biased towards agriculture to promote sustainable agriculture and ensure food security. Governance of the soil differs from Soil management in that, soil management involves practices and techniques used to increase and maintain soilfertility, structure, and carbon sequestration, among others. ref name Follet2001 cite journal last Follet first R.F title Soil management concepts and carbon sequestration journal Soil Tillage and Research year 2001 volume 61 issue 1 2 pages 77 92 ref Soil management techniques are heavily utilised in agriculture, because of the need ... effects of agricultural land use such as soil erosion has formed the basis of the discourse and awareness on soil governance, ref name Bonn2011 and has also seen the emergence of science and technology as nexuses between soil management and governance. ref name GSM2011 cite web last Global Soil Map title About the Project url http www.globalsoilmap.net ref Soil governance mechanisms are usually ... more details
engineering constructions. Ecological functions improvement of water regime by improved soil interception and storage capability as well as water consumption by plants soil drainage protection from wind protection from ambient air pollution mechanical soil amelioration by the roots of plants balancing of temperature conditions in near ground layers of air and in the soil shading improvement of nutrient content in the soil and thus of soilfertility on previously raw soils balancing of snow deposits ...wikify date November 2010 Soil bioengineering is a discipline of civil engineering. It pursues technological ... in near natural constructions while exploiting the manifold abilities inherent in plants. Soil Bioengineering ... fields of soil and hydraulic engineering, especially for slope and embankment stabilization and erosion ... and Conservation. University of Alberta Press. Edmonton. Alberta. 404 pp. ref Soil bioengineering is the use of living plant materials to provide some engineering function. Soil bioengineering is an effective tool for treatment of a variety of unstable and or eroding sites. Soil bioengineering techniques have been used for many centuries. More recently Schiechtl 1980 has encouraged the use of soil bioengineering with a variety of European examples. Soil bioengineering is now widely practiced ... Institute. The University of Greenwich. United Kingdom. ref Fields of Application and Plants for Soil Bioengineering Control Works Soil Bioengineering methods can be applied wherever the plants which ... methods. Functions and Effects of Soil Bioengineering Structures The objective of soil bioengineering ... to Technical functions protection of soil surface from erosion by wind, precipitation, frost and flowing ... of flow velocity along banks surface and or deep soil cohesion and stabilization drainage protection from wind aiding the deposition of snow, drift sand and sediments increasing soil roughness ... of useful green areas and woody plant populations on previously derelict land The result of soil bioengineering ... more details
of soilfertility. However, fixed nitrogen may circulate many times between organisms and the soil ...merge Soil biology discuss Talk Soil life Merger proposal date October 2009 Refimprove date March 2012 Soil life , soil biota , or edaphon is a collective term for all the organisms living within the soil. Overview In balanced soil, plants grow in an active and steady environment. The mineral content of the soil and its heartiful structure are important for their well being, but it is the life in the earth that powers its cycles and provides its fertility. Without the activities of soil organisms, organic material s would accumulate and litter the soil surface, and there would be no food for plants. The soil biota includes Megafauna size range 20 mm upward, e.g. mole animal moles , rabbit ... , roundworm s, and rotifer s. Of these, bacteria and fungi play key roles in maintaining a healthy soil ... and other breakdown products. Soil detritivore s, like earthworms, ingest detritus and decompose it. Saprotroph ... in their armies. Also the rodents, wood eaters help the soil to be more absorbant. Soil life table This table is a r sum of soil life ref name solt03 , coherent with prevalent taxonomy as used in the linked ... of producing 16 million more in just 24 hours. Most soil bacteria live close to plant roots and are often referred to as rhizobacteria. Bacteria live in soil water, including the film of moisture surrounding soil particles, and some are able to swim by means of flagellum flagella . The majority of the beneficial soil dwelling bacteria need oxygen and are thus termed aerobic organism aerobic bacteria ... to cause putrefaction of dead organic matter. Aerobic bacteria are most active in a soil that is moist ... soil pH , and where there is plenty of food carbohydrate s and micronutrient s from organic matter ... living nitrogen fixing bacteria in the soil or water such as Azotobacter , or by those that live ... in soil into nitrogen gas or into gaseous compounds such as nitrous oxide or nitric oxide ... more details
The name soil stabilizer can refer to Soil cement , a mix of pulverized natural soil with small amount of Portland cement and water Cellular confinement , a honeycomb like plastic soil stabilizer. Disambig ... more details
and Fertility of Soils title Burial of soil surface artifacts in the presence of lumbricid earthworms ...wikify date February 2010 copyedit date March 2011 The soil biomantle can be described and defined in several ways. In broad and simplest terms, the soil biomantle is the organic rich bioturbated upper part of soil, including the topsoil where most biota live, reproduce, die, and become assimilated. The biomantle is, thus, the upper zone of soil that is predominantly a product of organic activity, where bioturbation is a dominant process. Soil bioturbation consists predominantly of three subsets ... mycelia , shiro growth . All three processes promote soil parent material destratification, mixing, and often particle size sorting, leading with other processes, to the formation of soil and its horizons ..., and D.N. Johnson year 2005 title Animating the biodynamics of soil thickness using process vector analysis A dynamic denudation approach to soil formation journal Geomorphology volume 67 issue 1 4 ... Wilkinson, M.T. and G.S. Humphreys year 2005 title Exploring pedogenesis via nuclide based soil production rates and OSL based bioturbation rates journal Australian Journal of Soil Research volume 43 ... One and two layered biomantles, soil stonelayers stone lines The biomantle includes the topsoil, or A horizon ... above the B horizon . In gravelly parent materials where soil particle biosorting by animals ..., or gravels of approximately uniform size . If two layered, the soil profile horizon notations .... ref name Johnson, D.L. 1995 Johnson, D.L. 1995. Reassessment of early and modern soil horizon ... to tropical M S W horizons? Soil Science Trends in Agricultural Science , v. 2, pp. 77 91. Trivandrum ... bioturbators that move large volumes of soil to the surface ants , termites , worms, etc. , horizon notations are M SL W, where M is the mineral soil extended topsoil , SL is stonelayer, and W is the underlying ... on soil horizons and insect activity in granite soils. First Federal Science Congress, Proceedings ... more details
Soil may refer to the following Soil , a naturally occurring granular covering on the surface of Earth, capable of supporting life Lunar soil , a similar granular covering on the Moon though without Earth soil s organic components Soil band , an American hard rock band Soil song , a System of a Down song Soil EP , the debut EP for Soil Am d e Soil , Belgian industrialist, and consul to Moscow namesake of several antique violins Soil Stradivarius , a violin fabricated in 1714 by Antonio Stradivari Soil Stradivarius 1708 , a violin fabricated in 1708 by Antonio Stradivari Soil Guarnerius , a violin fabricated in 1733 by Giuseppe Guarneri del Ges Soil may also refer to the abstract concept of the land controlled by a sovereignty . disambig ja ro Sol ... more details
Scobey soil is the state soil of Montana . Scobey soil is known for its productivity for farming wheat http www.urbanext.uiuc.edu soil st soils mt soil.htm . See also Pedology soil study List of U.S. state soils External links http ortho.ftw.nrcs.usda.gov osd dat S SCOBEY.html http www.mt.nrcs.usda.gov soils mtsoils Category Pedology Category Soil in the United States Category Geology of Montana Category Agriculture in Montana Category Types of soil Category Symbols of Montana soil stub ... more details
Soil map is a map showing diversity of soil types and or soil properties soil pH , soil texture texture s, organic matter , depths of soil horizons horizons etc. in the area of interest. It is typically the end result of a soil survey inventory, i.e. soil survey . Soil maps are most commonly used for land .... Traditional soil maps typically show only general distribution of soils, accompanied by the soil survey report. Many new soil maps are derived using digital soil mapping techniques. Such maps are typically richer in context and show higher spatial detail then the traditional soil maps. Soil ... Fig sample BSMC.jpg 453px An example of a traditional soil map showing soil mapping units, described soil profile s and legend. right In the digital era, soil maps are being inputted in digital format ..., soil maps are only visualizations of the soil resource inventories commonly stored in a Soil Information System SIS , of which the major part is a Soil Geographical Database. A Soil Information System ... observations, soil mapping units and soil classes. Different elements of an SIS can be manipulated and then visualized against the spatial reference grids or polygons . For example, soil profiles can be used to make spatial prediction of different chemical and physical soil properties. One should also distinguish soil maps that display primary soil attributes, i.e. the soil attributes originally described or measured in the field, and the soil inferred attributes also called secondary soil information, i.e. the properties of the soils in the context of the soil use soil production capacity, soil reaction to certain use, soil functions, soil degradation measures etc. See also Map Soil science Soil survey Digital soil mapping Geographic information system GIS Pedometrics External links http www.digitalsoilmapping.org International Working Group on Digital Soil Mapping http www.IUSS.org International Union of Soil Sciences Soil Maps of the world http eusoils.jrc.it esdb archive EuDASM ... more details
led to more advanced microorganisms. Microorganisms in soil are important because they affect the structure and fertility of different soils. Soil microorganisms can be classified as bacteria, actinomycetes ...wikify date November 2011 Soil microbiology is the study of organisms in soil, their functions, and how they affect soil properties. It is believed that between two to four billion years ago, the first ... the organisms and different functions in the soil it lives in. ref name autogenerated1 Rao, Subba. Soil Microbiology. Fourth ed. Enfield Science Publishers, 1999. Print. ref Bacteria Bacteria are the smallest organisms in the soil and are the only soil microorganisms that are prokaryote prokaryotic ... abundant microorganisms in the soil, and serve many important purposes, one of those being nitrogen fixation among other biochemical processes. ref name autogenerated3 Wood, Martin. Soil Biology ... fixing bacteria. ref name autogenerated1 Actinomycetes Actinobacteria Actinomycetes are soil microorganisms ... A. Zuberer. Principles and Applications of Soil Micobiology. Upper Saddle River Prentice Hall ... Fungi Next to bacteria, fungi are abundant in soil population compared to other microorganisms. Fungi are important in the soil as food sources for other, larger organisms, pathogens, beneficial symbiotic ... process nutrients to improve the soil they inhabit. Fungi can be split into different species based ... as quantity of organic matter in the soil has a direct correlation to the growth of fungi, because most ... on oxygen, and the higher the moisture content in the soil, the less oxygen is present for fungi .... Algae, however, do not have to be on the soil surface or directly exposed to sun rays, but it can live below the soil surface as long as the algae has uniform temperature and moisture conditions. Bacteria ... from duplication of spores, like many of the other soil microorganisms depend on. Protozoa can be split .... These flagellates are found mostly in soil and flagellates that contain chlorophyll typically occur ... more details
merge Soil life discuss Talk Soil biology Merger proposal date October 2009 Soil biology is the study of microbial and fauna l activity and ecology in soil . These organisms include earthworm s, nematode s, protozoa , fungi , bacteria and different arthropod s. Soil biology plays a vital role in determining many soil characteristics yet, being a relatively new science, much remains unknown about soil biology and about how the nature of soil is affected. Overview The soil is home to a large proportion of the world s genetic diversity. The linkages between soil organisms and soil functions are observed to be incredibly complex. The interconnectedness and complexity of this soil food web soil food web means any appraisal of soil function must necessarily take into account interactions with the living communities that exist within the soil. We know that Soil life soil organisms break down organic ... in the bodies of soil organisms prevent nutrient loss by Leaching pedology leaching . Microbial exudates act to maintain soil structure , and earthworms are important in bioturbation . However, we ... understanding of how soil biological components affect us and the planet they share with us. Scope Soil biology involves work in the following areas scientific modelling Modelling of biological processes and population dynamics . Soil biology, soil physics physics and chemistry occurrence of physicochemical ... or organic compounds involvement of such interactions in soil pathogenicity transformation of mineral and organic compounds, biogeochemical cycle cycling of elements soil structuration Complementary ..., biogeography , ecology, soil processes, organic matter, nutrient dynamics and landscape ecology . See also Nitrification Nitrogen cycle Soil ecology Soil life References Burges, A., and Raw, F., 1967, Soil Biology Academic Press http soils.usda.gov sqi concepts soil biology biology.html USDA NRCS Soil Biology URL accessed on 2006 04 11 Bibliography Alexander, 1977, Introduction to Soil Microbiology ... more details
Bulk soil is soil outside the Rhizosphere ecology rhizosphere . Bulk soil is not penetrated by plant root s. Natural organic compounds are much lower in bulk soil than in the rhizosphere. ref cite book last Stotsky first G. title Soil Biochemistry publisher CRC Press date 2000 id Volume 9 isbn 0824794419 page 207 ref Microbial populations are typically lower in bulk soil than in rhizospheric soil. Furthermore, bulk soil inhabitants are generally smaller than identical species in the rhizosphere. ref cite book last Stotsky first G. title Soil Biochemistry publisher CRC Press date 1996 id Volume 10 isbn 0824788346 page 234 ref References div class references small references div Category Soil biology ecology stub ... more details
The Tanana soil is the official state soil of Alaska . Profile The Tanana soil consists of shallow, well drained, moderately permeable soils formed in materials weathered from limestone . They are gently sloping to very steep soils on foot slopes and side slopes of limestone hills. Slopes range from 2 to 60 percent. The mean annual precipitation is about convert 70 in and the mean annual temperature is about 76 degrees F. The soil is named after the Tanana River in Alaska. See also Pedology soil study Soil types List of U.S. state soils External links http ortho.ftw.nrcs.usda.gov osd dat T TANANA.html NRCS Tanana Soil Category Pedology Category Soil in the United States Category Geology of Alaska Category Symbols of Alaska Category Types of soil ... more details
Soil health is an assessment of ability of a soil to meet its range of ecosystem functions as appropriate to its environment. Aspects of soil health The term soil health is used to assess the ability of a soil ... Support human health and habitation The underlying principle in the use of the term soil health is that soil is not just a growing medium, rather it is a living, dynamic and ever so subtly changing environment. We can use the human health analogy and categorise a healthy soil as one In a state ... cooperatively functioning such that the soil reaches its full potential and resists degradation ... that it maintains this capacity into the future. Conceptualisation of soil health Image SoilHealthConcept.jpg Soil health is the condition of the soil in a defined space and at a defined scale relative to a described benchmark. The definition of soil health may vary between users of the term as alternative users may place differing priorities upon the multiple functions of a soil. Therefore, the term soil health can only be understood within the context of the user of the term, and their aspirations of a soil, as well as by the boundary definition of the soil at issue. Interpretation of soil ..., and on the geographic circumstance of the soil. The generic aspects defining a healthy soil can be considered ... cover of vegetation Carbon levels relatively close to the limits set by soil type and climate ... set by the soil environment and climate Only geological rates of erosion No accumulation of contaminants and, The ecosystem does not rely excessively on inputs of fossil energy An unhealthy soil thus is the simple converse of the above. The measurement of soil health On the basis of the above, soil health will be measured in terms of individual ecosystem services provided relative to the benchmark. Specific benchmarks used to evaluate soil health include CO sub 2 sub release, humus levels ... See also Dryland salinity Soil biodiversity Soil carbon Soil policy Victoria, Australia Soil quality ... more details
Globalize date December 2010 Soil survey , or soil mapping , is the process of classifying soil type s and other soil properties in a given area and geo encoding such information. It applies the principles of soil science , and draws heavily from geomorphology , theories of pedogenesis soil formation , physical geography , and analysis of vegetation and land use patterns. Primary data for the soil ... photography but LiDAR and other digital techniques steadily gaining in popularity. In the past, a soil ... with them. Today, a growing number of soil scientists are bring a rugidized tablet computer and GPS ..., soil geodatabases, mapping keys, and more. Deleted image removed Image Soil Survey Sample.jpg 300px right thumbnail Sample of an aerial photo from a published soil survey The term soil survey may also ... published in book form for individual counties by the National Cooperative Soil Survey . Today, soil ... websoilsurvey.nrcs.usda.gov app NRCS Web Soil Survey where a person can create a custom soil survey. This allows for rapid flow of the latest soil information to the user. In the past it could take years to publish a paper soil survey. Today it takes only moments for changes to go live to the public. Also, the most current soil survey data is made available at http soildatamart.nrcs.usda.gov NRCS Soil Data Mart for high end GIS users such as professional consulting companies and universities. The information in a soil survey can be used by farmer s and rancher s to help determine whether a particular soil type is suited for agronomy crops or livestock and what type of soil management might be required. An architect or engineer might use the engineering properties of a soil to determine whether ... for maintaining or constructing their garden, yard, or home. Soil survey components Typical information in a published county soil survey includes the following a brief overview of the county s geography a general soil map with a brief description of each of the major soil types found in the county ... more details
The air space in soil contains oxygen to provide for Respiration physiology respiration of plant root s and soil organisms. This air space could also contain carbon dioxide as a product of respiration of plant roots and soil organisms. Composition of air in soil and atmosphere ref cite doi 10.1017 S0021859600002410 ref Nitrogen Soil Air 79.2 Atmosphere 79.0 Oxygen Soil Air 20.6 Atmosphere 20.9 Carbon Dioxide Soil Air 0.25 Atmosphere 0.03 Gas molecules in soil are in continuous thermal motion according to the kinetic theory of gases , there is also collision between molecules a random walk . In soil, a concentration gradient causes net movement of molecules from high concentration to low concentration, this gives the movement of gas by diffusion . Numerically, it is explained by Fick s law of diffusion . Soil gas includes air, water vapour and the pollutants that might be picked up from the soil underneath a building and carried by air leakage into the building. The chief concerns among these pollutants are radon and methane gases. Or date May 2009 References reflist Category Soil physics Category Soil Category Article Feedback 5 soil sci stub ... more details
Multiple issues wikify February 2012 no footnotes June 2010 refimprove June 2010 A soil crust is a layer of soil whose particles cohere because of organic material including live organisms and what they produce. ref http www.soilcrust.org crust101.htm Introduction to Biological Soil Crusts , Canyonlands Research Station ref References Reflist External references http geochange.er.usgs.gov sw impacts biology crypto Cryptobiotic soils by the USGS Category Soil biology Crust, soil Category Lichens ecology stub ... more details
Soil functions are general capabilities of soil s that are important for various agriculture agricultural , ecosystem environmental , Environmental preservation nature protection , landscape architecture and Urban area urban applications. Six key soil functions are ref cite book author Blum, WEH date 1993 title Soil Protection Concept of the Council of Europe and Integrated Soil Research work Soil and Environment Vol 1 editor HJP Eijsackers and T Hamers pages 37 47 publisher Kluwer Academic Publisher, Dordrecht ref , ref cite book author DETR date 2001 title title unknown ref Food and other biomass production Environmental Interaction storage, filtering, and transformation Biological Habitat ecology habitat and gene pool Source of raw materials Physical and cultural heritage Platform for man made structures buildings, highways Mapping soil functions Soil map s can depict soil properties and functions in the context of specific soil functions such as agricultural food production, environmental protection, and civil engineering considerations. Maps can depict functional interpretations of specific properties such as critical nutrient levels, heavy metal levels or can depict interpretation of multiple properties such as a map of erosion risk index. Mapping of function specific soil properties is an extension of soil survey , using maps of SoilSoil components soil components together with auxiliary information including pedotransfer function s and soil inference models to depict inferences about the specific performance of soil mapping units. See also Digital soil mapping Pedotransfer function References references Category Soil science Functions, soil ... more details
About a construction method other uses of the term Stockpile disambiguation Unreferenced date January 2007 Orphan date February 2009 File soil stockpile1.jpg thumb Small dozer forming soil stockpile 300px In site construction , as in construction development, a soil stockpile is formed with soil excavated to provide proper building elevations. Stockpiled soil is later replaced to contour the surface to the desired Grade slope grade , or the material is used for reclamation restoration of the region following the removal of all roads and facilities. Category Construction terminology Industry stub ... more details
Soils are of various types depending on various chemicals present.Sodic soils are characterized by a disproportionately high concentration of Sodium Na in their cation exchange complex. They are usually defined as consisting an exchangeable Sodium percentage greater than 15 . These soils tend to occur within arid to semi arid regions and are innately unstable, exhibiting poor physical and chemical properties, which impede water infiltration, water availability, and ultimately plant growth. Sodic is an adjective of the noun Sodium , a chemical element belonging to the alkali metal group. Sodic soil or soil sodicity may refer to Saline soil Sodic saline soil , a soil with excess salts where Sodium Chloride NaCl predominates Alkaline soil Sodic alkaline soil , a soil with a high pH 9 due to the presence of excessive Sodium Carbonate Na sub 2 sub CO sub 3 sub Category Soil chemistry Category Types of soil Category Land reclamation ... more details
Cleanup date June 2010 Soil colour does not affect the behavior and use of soil, however it can indicate the composition of the soil and give clues to the conditions that the soil is subjected to. ref .... Prentice Hall, 2006. ref Soil can exhibit a wide range of colour gray, black, white, reds, browns, yellows and under the right conditions green. ref name Elements Varying horizontal bands of colour in the soil often identify a specific soil horizon . The development and distribution of color in soil ... in soil parent material weather, the elements combine into new and colorful compounds. Aerobic conditions ... flow with complex, mottled patterns and points of color concentration. Causes of Soil Color Soil ... state of iron and magnesium. Yellow or red soil indicates the presence of iron oxides . ref name Elements Dark brown or black colour in soil indicates that the soil has a high organic matter content. Wet soil will appear darker than dry soil. ref name Elements However the presence of water also affects soil color by affecting the oxidation rate. Soil that has a high water content will have less air in the soil, specifically less oxygen. In well drained and therefore oxygen rich soils red and brown colours caused by oxidation are more common, as opposed to in wet low oxygen soils where the soil ... soil drainage in the area. The presence of specific minerals can also affect soil color. Manganese oxide causes a black color, glauconite makes the soil green, and calcite can make soil in arid regions ... brown, yellowish brown, etc., soil colors are also described more technically by using Munsell Munsell soil color charts , which separate color into components of hue relation to red, yellow and blue ... Department of Agriculture Natural Resources Conservation Service title The Color of Soil accessdate ... Service title Soil Color Contrast accessdate 2007 11 25 Cite web url http www.physorg.com news64045379.html title Why is the ground brown accessdate 2007 11 25 Category Soil science Soil sci ... more details
Soil chemistry is the study of the Chemistry chemical characteristics of soil . Soil chemistry is affected by mineral composition, organic matter and Environment biophysical environmental factors. History Until the late 1960s, soil chemistry focused primarily on chemical reactions in the soil that contribute to pedogenesis or that affect plant growth. Since then, concerns have grown about environmental pollution , organic and inorganic soil contamination and potential ecological health and environmental health risks . Consequently, the emphasis in soil chemistry has shifted from pedology and agricultural soil science to an emphasis on environmental soil science . Environmental soil chemistry A knowledge of environmental soil science environmental soil chemistry is paramount to predicting the fate, mobility and potential toxicity of contaminants in the environment. The vast majority of environmental contaminants are initially released to the soil. Once a chemical is exposed to the soil environment a myriad of chemical reaction s can occur that may increase or decrease contaminant toxicity. These reactions include adsorption desorption , Precipitation chemistry precipitation , polymerization , solvation dissolution , complexation and redox oxidation reduction . These reactions are often disregarded by scientists and engineers involved with environmental remediation . Understanding these processes enable us to better predict the fate and toxicity of contaminants and provide the knowledge to develop scientifically correct, and cost effective remediation strategies. Concepts Anion and cation exchange capacity Soil pH Mineral formation and transformation processes Clay mineralogy Sorption and Precipitation chemistry precipitation reactions in soil Redox Oxidation reduction reactions ... 2000 http www.agron.iastate.edu soilchemistry History 20of 20Soil 20Chemistry.htm The History of Soil Chemistry . Url accessed on 2006 04 11 Category Soil chemistry Soil sci stub bn ca ... more details
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