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• Advanced Soil Genesis: Soil Morphology and Classification - A short introduction to soil morphology (description) and a presentation of the 12 soil orders (US) and their genesis. University of Arizona, Soil, Water and Environmental Science, Craig Rasmussen. [PDF]
• Are Laterites Caused by the Alkaline Gut of Termites? - It is proposed that latisols (ultisols) are caused by the extremely alkaline midgut of humus eating termites.
• Australia: Soil Maps of Tasmania (DPIW) - Small scale (1/100000) reconnaissance soil maps of Tasmania. Pdf files of the map are available for 11 area.
• Australia: The Australian Soil Classification - Explains classification schemes in general. Detailed description of australian soil types with glossary and references. Based on a book by the CSIRO.
• Australian Soil Classification: An Interactive Key - Gives details of a CD-ROM of this name, a reference tool that allows the purchaser to allocate soil profiles to any level of the official Australian Soil Classification.
• Australian Soil Resource Information System (ASRIS) - Interactive soil maps and information on soil resources in Australia, from national to local (soil profile) scale.
• Bulk Density Determination - Detailed description to determine the bulk density of soil.
• Canada: National Soil Database (NSDB) - Soil surveys, land inventory, soil landscapes, agroecological resource areas, land potential and ecosystems maps at various scales in Canada. Agriculture and Agri-Food Canada (AAFC).
• Canada: Soil surveys of Ontario - List of surveys and maps.
• Canada: Soils of Canada - Online maps.
• Canada: Soils of Canada - A collection of soil profiles representing the twenty Great Groups in the Canadian System of Soil Classification. Includes descriptions of soils and plants of Sub-Boreal Spruce Zone and the Engelmann Spruce-Subalpine Fir Biogeoclimatic Zone. Many pictures.
• Canada: Soils of New Brunswick - Soil surveys and maps from CanSIS.
• Canada: The Canadian Soil Classification System - A short introduction to the Canadian soil classification system: Classification principles, mains soil orders and simplified key to soil order (University of Alberta)
• Canadian Soil Information System - Information on soil surveys and analysis but also on the Environmental Sustainablility of Canadian Agriculture.
• Classification Procedures for Expansive Soils - Article by A Sridharan and K Prakash discussing how best to set about classifying expansive soils, as the use of standard methods of classification result in distress to the structures founded on them. [PDF]
• A Compendium of On-Line Soil Survey Information - A collection of links and information on soil classification systems: Institutes, classifications and methods, databases, and learning resources. (by D G Rossiter)
• Dedcoastland - The Mediterranean scientific network research on soil degradation and conservation, land use, desertification and erosion.
• Digital Soil Mapping working group (IUSS) - News, conferences and tools related to Digital Soil Mapping. International Union of Soil Sciences, Soil geography (1.2) and Pedometrics (1.5) commissions.
• Europe: Soil profiles of Europe - Pictures and descriptions of common soil types found in Central Europe.
• European Soil Portal - European soil related databases, maps, documents, publications, projects, news and mailing-list at the European Commission, Joint Research Centre.
• Icelandic Soils - Map and short description of Iceland seven main soil types. ( Agricultural Research Institute of Iceland)
• Ireland: Soil Maps of Ireland - A collection of maps.
• Israel: Soils of Israel - A set of images to illustrate the soils of the arid part of Israel. Includes a description list of the soil groups in English and Hebrew. Also available is a conversion table from Dan's to both the USDA and FAO classification systems.
• Italian National Center for Soil Mapping - Description of activities and services. (English side under development)
• New Zealand: Major Soils of Tuapaka Farm - Information, soil characterization and description and soil use. From Massey University. Photos.
• New Zealand Soils Portal - Provides access to Nationally Significant Soils Databases, but also a wealth of explanatory information about current and historical soil naming schemes used in New Zealand.
• Pedometrics - Newsletter, conferences, jobs and articles related to the mathematical and statistical measurement of soil distribution and genesis (Commission 1.5, International Union of Soil Sciences).
• Russia: Soil Map of Russia/FAO soil types - Table correlating the Soil Map of Russia's soil type with FAO World Reference Base (Land Ressources of Russia)
• Soil Collections , Oak Ridge National Laboratory - Datasets of soil properties (physical and chemical), at various scales. Distributed Active Archive Center, USA.
• Soil geography and geostatistics - Concepts and Applications - A comprehensive book on the application of geostatistics and spatial analysis to soils. European Commission, Joint Research Centre, European Soil Portal. [PDF]
• Soil Micromorphology - Sites of interest, books and events related to soil observation at the microscopic scale. Soil Science Society of America, Soil mineralogy div (S9)
• Soil Morphology & Micromorphology (IUSS Commission) - International Union of Soil Science Commission 1.1, Soil Morphology and Micromorphology. Newsletter, meeting and announcement.
• Soil Survey Photography - Principles and Techniques is a presentation on Soil Survey photography. [PowerPoint Presentation]
• South Africa: Agricultural Geo-referenced Information System - Soils - Soil surveys, soil classification and dynamic maps for South-Africa. ARC Institute for Soil, Climate and Water/AGIS.
• Sweden: MarkInfo - Information and maps on Swedish forest soils, their morphological and chemical properties. Swedish University of Agricultural Sciences and Swedish Environmental Protection Agency.
• Swedish National Survey of Forest Soils and Vegetation - A long term inventory of permanent sample plots of the Swedish National Forest. Short English summary, the details are in Swedish.
• UK: LandIS - Land Information System - Provide site reports, GIS datasets and a free "Interactive Soilscapes Viewer" for UK soils National Soil Resource Institute, Cranfield University).
• UK: United Kingdom soil classification system - A short introduction to UK soil classification system. Soil characteristics and soil classes. SoilsWorldwide (National Soil Resources Institute, Cranfield University)
• USA: Classifying Soils Using Soil Taxonomy: The Twelve Soil Orders - Brief definitions and pictures of the US 12 soil orders .University of Minnesota, Soil, Water and Climate department.
• USA: Distribution Maps of Dominant Soil Orders - Maps showing U.S. land area in different soil orders.
• USA: NRCS Soil classification - Comprehensive resources on USDA soil classification system: key to soil taxonomy (english/spanish), soil series description and database, discussion forum.
• USA: NRCS Soil Survey - Lists soil surveys, survey programs, soil survey technology, standards, data and references.
• USA: NRCS Soil Survey Guides and References - A collection of on-line guidebook for soil survey in the US (and elsewhere), including the "Soil Survey Manual".
• USA: NRCS Soils Data Mart - Data and other resources on soils, soil taxonomy, and U.S. soil surveys.
• USA: NRCS Soils Gallery - Contains representative pictures of soil orders plus profile and landscape pictures of more specific soils.
• USA: Soil Survey Information for Massachusetts and New England - Featuring soil information, ground penetrating radar, GIS, and soil profile photos.
• USA: Soil Survey of the State of Hawaii - Soil maps and details for all Hawaiian islands.
• USA: The Soils of Pennsylvania - Maps and description.
• USA: The Twelve Soil Orders - This system for classifying soils is one of the most widely used soil classification systems in the world. Collection of information and images to illustrate the distribution, properties, ecological significance, and use of these 12 soil orders.
• USA: Washington State Soils - Interactive maps and pictures.
• USA: Web Soil Survey (USDA, NRCS) - Interactive soil maps and soil information in United States (data from National Cooperative Soil Survey).
• World: European Digital Archive on Soil Maps of the World - Aims to provide and preserve soil maps from all over the world. Information about and access to scanned maps and publications available online. EU Joint Research Centre
• World: Global Soil Regions - Map showing world wide distribution of soil types.
• World: GlobalSoilMap - A international project of fine-resolution world soil map (and derived information), using existing datasets and state-of the art mapping technologies.
• World: Lecture notes on the major soils of the world - Description, characteristics, geography, landforms and genesis of the 30 Reference Soil Groups (WRB), grouped in 10 sets
• World Reference Base for soil resources - The WRB project is an international soil classification framework (FAO, IUSS, ISRIC): Reference documents, world soil atlas, classification key, news and forum.
• World Reference Base for soil resources (2006, 2nd ed.) - The WRB is an international soil classification framework (FAO, IUSS, ISRIC): diagnostic, key and definitions of the reference soil groups. [PDF]
• World Reference Base, Map of World Soil Resources - Map, information and legend of the World Soil Resources. 1:25.000.000 scale, with image and georeferenced vector formats, FAO/AGL 2003.
• World Soil Resources - Information, educational resources, documents and list of institutions about World Soil Resources. USDA, Natural Resources Conservation Service.
• World Soil Resources Map Index - A collection of thematic world soil resources maps: geography, biomes, physical properties, biochemistry, threats and stresses. USDA, Natural Resources Conservation Service
• World Soil Survey Archive and Catalogue (WOSSAC) - Collection of (paper) soil maps, reports and imagery established by British soil scientists in various countries.

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