Soils
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- Soil Fertility
- A large collection of information ranging from soil test interpretation to prevention of nutrient deficiencies.
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- Soil Fertility and Crop Nutrition
- The Ontario Ministry of Agriculture, Food and Rural Affairs offers a large collection of newsletters and factsheets with topics ranging from soil sampling to fertilizer requirements and micronutrients.
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- Soil Testing is an Excellent Investment for Garden Plants and Commercial Crops
- Soil testing is an inexpensive way of maintaining good plant health and maximum crop productivity and this factsheet provides guidance on why, when and how to test soil. [PDF]
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- Soils, Cropping Practices and Fertilizer Use
- Describes the fertilizer requirements of different soil types, with particular reference to Alberta.
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- The International Fertiliser Society
- Scientific, technical, environmental, economic and safety aspects of the production, marketing, use and application of fertilizers.
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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]
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- AfricaSoils.net, African Soil Information Service
- A new digital soil map of Africa. Project leaded by the CIAT/CGIAR and financed by Bill & Melinda Gates Foundation and Alliance for a Green Revolution in Africa.
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- 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.
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- 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.
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- Australian Soil Resource Information System (ASRIS)
- Interactive soil maps and information on soil resources in Australia, from national to local (soil profile) scale.
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- 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.
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- FAO: Land Resources
- The Land Tenure and Management Unit promotes the development of cost-effective methods for land and soil survey and classification and maintains a database and web-based information system on land resources and land use.
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- 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.
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- The Australian Soil Classification
- Explains classification schemes in general with detailed description of Australian soil types, glossary and references.
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- 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).
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- 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)