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Topic: FAO soil classification

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Soil classification

Soil science

USA soil taxonomy

Pedogenesis

Soil

Soil pH

International Committee on Anthropogenic Soils

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Manure

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	FAO soil classification - Wikipedia, the free encyclopedia
		The FAO developed a supra-national classification, also called World Soil Classification, which offers useful generalizations about soils pedogenesis in relation to the interactions with the main soil-forming factors.
		The FAO soil map is a very simple classification system with units very broad, but it is the only truly international system, and most soils can be accommodated on the basis of their field descriptions.
		The FAO soil map is intended for mapping soils at a continental scale but not at local scale.
	en.wikipedia.org /wiki/FAO_soil_classification (268 words)

	Soil classification - Wikipedia, the free encyclopedia
		Soil classification is a contentious subject, from the structure of the system itself, to the definitions of classes, and finally in the application in the field.
		In soil survey, as practiced in the United States, soil classification usually means criteria based on soil morphology in addition to characteristics developed during soil formation.
		Fine-grained soils are then subdivided according to their plasticity (for fine soils and coarse soils with some fines), while coarse-grained soils are subdivided by the properies of the fines or their grain-size homogeneity.
	en.wikipedia.org /wiki/Soil_classification (1007 words)

	YourArt.com >> Encyclopedia >> soil (Site not responding. Last check: 2007-11-01)
		Soil, comprising the pedosphere, is positioned at the interface of the lithosphere with the biosphere, atmosphere, and hydrosphere.
		Soil acidification is accelerated by the use of acid-forming nitrogenous fertilizers and by the effects of acid precipitation.
		Soil salination is the accumulation of free salts to such an extent that it leads to degradation of soils and vegetation.
	www.yourart.com /research/encyclopedia.cgi?subject=/soil (3680 words)

	IALC: Soils of Arid Regions of the U.S. and Israel: Soil Classification Systems
		Aridic soils are soils that occur in an arid environment (See: Classifications of Arid Land Soils).
		Soil texture is a good example of the problems involved in correlating classifications between two or more systems.
		USDA Soil Taxonomy is a hierarchical system and used almost exclusively in the US for agricultural, biological, and geological studies.
	cals.arizona.edu /OALS/soils/classifsystems.html (1548 words)

	FAO/AGL - World Reference Base for Soil Resources - Classification Key (Site not responding. Last check: 2007-11-01)
		Other soils having an eluvial horizon, the lower boundary of which is marked, within 100 cm from the soil surface, by an abrupt textural change associated with stagnic properties above that boundary
		a mass of granules ("grumic"), or if the soil is cultivated while cracks are open, the cracks may be filled mainly by granular materials from the soil surface but they are open in the sense that the polyhedrons are separated.
		If the soil is irrigated the upper 50 cm has a coefficient of linear extensibility (COLE) of 0.06 or more throughout.
	www.fao.org /ag/agl/agll/wrb/newkey.htm (1455 words)

	Middle East Open Encyclopedia: Soil (Site not responding. Last check: 2007-11-01)
		Soil horizons are formed by combined biological, chemical and physical alterations.
		An essential challenge in soil classification is that soils do not reproduce or have DNA like living organisms, so no "objective" criteria can be used to choose among classifications.
		Development was coordinated by the International Soil Reference and Information Centre (ISRIC) and sponsored by the International Union of Soil Sciences (IUSS) and the Food and Agriculture Organization (FAO) via its Land and Water Development division.
	www.baghdadmuseum.org /ref/?title=Soil (3778 words)

	GED 1.1 Template
		Soil water-holding capacities were then estimated by multiplying the available water content by the soil layer thickness and integrating over an effective crop root depth of one meter or less (i.e., encountered shallow impermeable layers).
		Soil units are further divided into three textural classes of coarse, medium, and fine which are defined by their relative proportions of clay (less than 2 ?m), silt (2-50 ?m), and sand (50-2000 ?m) content.
		Soils with abundant rock fragments reduce water-holding capacities and increases infiltration rates, and accordingly water-holding capacities are commonly adjusted by a rock fragment factor.
	www.ngdc.noaa.gov /seg/cdroms/reynolds/reynolds/reynolds.htm (7602 words)

	weblinks
		Soils of Arid Regions of the U.S. and Israel (Office of Arid Land Studies)
		Department of Soil, Water, and Climate - University of Minnesota
		Soil and Atmospheric Sciences - University of Missouri
	www.soils.wisc.edu /courses/SS325/weblinks.htm (245 words)

	Part 6: Data Sources for Land Evaluation (Site not responding. Last check: 2007-11-01)
		Another example is the ecological classification of Holdridge (1967), widely used in Latin America to distinguish 'life zones' that have a well-defined set of possible uses and limitations as well as human ecology.
		In areas with poor correlation of geomorphology to soils (e.g., blankets of volcanic ash in Ecuador, recently-emerged polder soils), the field observations themselves are used to locate the boundaries.
		In many land evaluations, ready-made climatic classifications are not sufficiently detailed or are not suited to the purposes of the land evaluation, so that the evaluator has to use the original data.
	www.css.cornell.edu /landeval/le_notes/s494ch6p.htm (9902 words)

	Soil science resources (Site not responding. Last check: 2007-11-01)
		Indigenous Soil Classifications: Their structure and function, and how they compare with scientific soil classifications.
		Key to the FAO Soil Units - Extract from the 1974 Legend of the Soil Map of the World
		FAOSOIL.HLP - FAO Soil Classification Programme from Dr.
	www.stormloader.com /geocoop/soils.htm (1019 words)

	The Nature and Properties of Soils, Thirteenth Edition by Nyle C. Brady and Ray R. Weil (Site not responding. Last check: 2007-11-01)
		Now in its thirteenth edition, The Nature and Property of Soils is designed to make the study of soils a fascinating and intellectually satisfying undertaking.
		This, the most widely-used soils textbook in the world, sets world-class standards for soils education.
		The text has an ecological approach that explains the fundamental principles of soil science in a manner that is relevant.
	www.vonl.com /CHIPS/natsoi13.htm (429 words)

	IALC: Soils of Arid Regions of the U.S. and Israel: Soil Classification Systems
		Soil Taxonomy äðåëîä ïåéîä úëøòî úà çúéôå ò÷ø÷ä úåøöåéäì úñçéúîä úëøòîä úà
		USDA Keys to Soil Taxonomy is a hierarchical system and used almost exclusively in the US for agricultural, biological, and geological studies.
		It has been applied throughout the world (Soil Survey Staff, 2003).
	ag.arizona.edu /OALS/soils/hclassifsystems.html (1362 words)

	SCIENCES of SOILS - Soil Sciences on the WEB
		Institute of Soil Science University of Goettingen - The server provides information about soils of Europe (still growing selection of images) and contents of some journals.
		RIEPT (MCAC/Costa Rica) Red Internacional de evaluación de Pastos Tropicales - The RIEPT is a non-profit organization for evaluation on Tropical Forages for the acid and semi-acid soils of Tropical America
		FAO Soil Classification interactive teaching program (Windows only) by F. Bailly
	hintze-online.com /sos/soils-online.html (381 words)

	EDU2 : Level 3
		Soil and Earth Sciences, Massey University, New Zealand
		University of Minnesota Department of Soil, Water, and Climate
		Soils of Arid Regions of the United States and Israel
	www.my-edu2.com /EDU/agricul5.htm (172 words)

	World Soil Resources \| NRCS Soils
		CGIAR is a system of 16 research centers promoting sustainable agriculture for food security in developing countries.
		ISRIC is a foundation for documentation, research and training about the soils of the world with emphasis on developing countries.
		CIESIN specializes in global and regional network development and science data management helping scientists, decision-makers and the public to better understand their changing world.
	soils.usda.gov /use/worldsoils/index.html (178 words)

	Soil Science
		But possibly of general interest to people committed to didactics in Soil Science.
		(characteristics of movement and adsorption of soil water)
		PC programs on soil classification according to FAO Unesco Soil Map of the World and World Reference Base for Soil Resources, WRB.
	soils-online.net (117 words)

	Soil Web Sites
		You can now do a Search by Keyword in our index of more than 600 soil and water science related links.
		Proceedings of the 4th Central European Workshop on Soil Zoology
		University of Ghent Geology and Soil Science Department
	soilweb.tripod.com /soilsite.htm (228 words)

	F to L Soil and Water Link Index
		FAOSOIL.HLP - Computer Programme for Soil Classification (in German)
		GEO COOP: Geoscience, Agriculture, Environment ; Soil Science Links - by Horst Vogel
		Geology of Soils (Student papers on soil topics)
	soilweb.tripod.com /f-l.htm (209 words)

	NAFA Emergency Preparedness and Response, Other Links
		The quality and reliability of these data sets is uneven across regions with particular regard to the world soil map that is based on a 1:5,000,000 scale map.
		• Classification of Soil Systems based on Transfer Factors
		Soil and Water Management and Crop Nutrition
	www.iaea.org /programmes/nafa/dx/emergency/fao/aez.html (75 words)

	[No title]
		Introduction) Soilwater.htm (1.3 Soil Water) Soilair.htm (1.3 Soil Air) Concepts.htm (2.
		Concepts of Soil Genesis / Classification) Fao.htm (2.3 Fao Classification) England.htm (2.3 Soil Classification in Great Britain) Germany.htm (2.3 Soil Classification in Germany) Russia.htm (2.3 Soil Classification in Soviet Union) Formation.htm (3.
		Soil Orders) — under construction: Histosols, Aridisols (Rest of htm files are under construction) Table of Contents Course Description Grading Timetable Recommended Text Web Links 1) Introduction 1.1) What is Soil?
	www.soils.wisc.edu /courses/SS325/structure325.doc (154 words)

	Soil Scientist Pennsylvania Soil Sciences Internet Library
		NASIS- National Soil Information System, an entirely new system for managing soil survey map unit data
		Brian Oram webpage at Wilkes University- Soil Texture Calculator and Soil Hydraulic Property Calculator
		Texas Tech University -Masters in Crop and Soil Science
	www.webdesignpros.net /consult/soilsscientist.htm (259 words)

	The Nature and Properties of Soils:0130167630:Brady, Nyle C.; Weil, Ray R.:eCampus.com (Site not responding. Last check: 2007-11-01)
		For eighty years, The Nature and Properties of Soils has delivered a complete, current, and reliable introduction to the study of soils in a manner that is both fascinating and intellectually satisfying.
		Whether used as the core textbook for college courses introducing the fundamentals of soil science, or as a comprehensive reference on the professional soil scientist's bookshelf, the book is widely recognized as the authoritative source for all of the latest information related to this exciting field.
		Accompanying this book—and all new to this thirteenth edition—is a companion website containing many unique and engaging opportunities for further study.
	www.ecampus.com /bk_detail.asp?isbn=0130167630 (459 words)

	Important SOIL SCIENCE links (Site not responding. Last check: 2007-11-01)
		The first Online Journal for the Soil Sciences
		Zeitschrift für Pflanzenernährung und Bodenkunde / Journal of Plant Nutrition and Soil Science
		Very detailed information and links about Soil Science
	www.uni-hohenheim.de /~kuzyakov/soillink.htm (29 words)

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