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Topic: Alfisols

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	Alfisols
		The suborders of Alfisols are distinguished by soil temperature and soil moisture (Figure 1.).
		Ustalfs are the Alfisols of subhumid to semiarid regions.
		Alfisols with wet soil moisture conditions and redox depletions with a chroma of 2 or less (e.g.
	grunwald.ifas.ufl.edu /Nat_resources/soil_orders/alfisols.htm (3694 words)

	Alfisols - Wikipedia, the free encyclopedia
		Alfisols are a soil order in USA soil taxonomy.
		Alfisols form in semiarid to humid areas, typically under a hardwood forest cover.
		Because of their productivity and abundance, the Alfisols represent one of the more important soil orders.
	en.wikipedia.org /wiki/Alfisols (82 words)

	Search Glossary - (SSSA) (Site not responding. Last check: 2007-11-06)
		Udalfs : Alfisols that have a udic soil moisture regime and mesic or warmer soil temperature regimes.
		Ustalfs : Alfisols that have an ustic soil moisture regime and mesic or warmer soil temperature regimes.
		Aqualfs : Alfisols that are saturated with water for periods long enough to limit their use for most crops other than pasture or woodland unless they are artificially drained.
	www.soils.org /sssagloss/cgi-bin/gloss_search.cgi?QUERY=Alfisols&SOURCE=2 (361 words)

	Key to Soil Orders in Florida
		Alfisols, Inceptisols, and Mollisols are not shown because: Alfisols are widely interspersed throughout the state; and the aerial extent of Inceptisols and Mollisols is too small to be shown at this scale of map (source: Carlisle and Brown, 1982).
		The unique properties of Alfisols in Florida are a combination of an argillic horizon, a medium to high amount of bases in the soil, water generally available to plants during the growing season, and an ochric epipedon.
		Ultisols are like Alfisols in that they have a horizon in which clay has accumulated to a significant extent (argillic horizon).
	edis.ifas.ufl.edu /SS113 (1499 words)

	Common Soils Used for Citrus Production in Florida
		Alfisols, Spodosols, and the Basinger soil series occur on broad, low flat areas or in sloughs at elevations from near MSL to about 35 ft in the Gulf and Indian River production areas, and 35 to 100 ft in the Peace River production area ( Figure 3).
		On the other hand, flatwoods Alfisols and Spodosols that support citrus are poorly to very poorly drained in their natural state because although the surface texture is sandy, the sub-surface argillic (clay) or spodic (organic hardpan) layer restricts downward water flow.
		Some of the Alfisols in Table 3 can be calcareous due to a substratum of natural calcium carbonate rock or shell that dominates their chemistry.
	edis.ifas.ufl.edu /SS403 (3180 words)

	SOILS AND LANDSCAPES OF MINNESOTA
		Alfisols --This order covers a large land area in Minnesota, part of which is now cultivated and part forested.
		Alfisols are primarily fertile soils of the forest, formed in loamy or clayey material.
		In the southern one-third of Minnesota hardwood forests were dominent, while in the northern two-thirds pine and oak forests were found.These are alfisols that occur in the southern one-third of Minnesota.
	www.extension.umn.edu /distribution/cropsystems/DC2331.html (3963 words)

	NM Soils
		The northern third of the state and the far eastern counties are dominated by Mollisols, Entisols, and Alfisols.
		Alfisols occur in the mountains of northern New Mexico and on the plains in eastern New Mexico.
		Alfisols have been subjected to soil formation processes for long enough that clay has translocated and accumulated in the subsoil.
	www.nmmastergardeners.org /Manual%20etc/Supplementfiles/NM%20%20Soils.htm (2442 words)

	Alfisols (Site not responding. Last check: 2007-11-06)
		Alfisols are forest soils that have relatively high native fertility.
		Alfisols form in loamy parent materials that are not too sandy or too clayey.
		Alfisols have a thin, dark A horizon, rich in organic matter and nutrients.
	www.geo.msu.edu /geo333/alfisols.html (450 words)

	s4chap2 (Site not responding. Last check: 2007-11-06)
		Alfisols form in semiarid to humid areas that have a clay enriched and nutrient enriched subsoil (argillic horizon).
		Alfisols have the potential to be very productive if conserved, but can also degrade rapidly if eroded.
		Ultisol are similar to Alfisols in that they have an ochric and argillic diagnostic features, however they are highly weathered and thus low in nutrients( the root ult comes from the Latin ultimus for ultimate).
	www.soils.umn.edu /academics/classes/soil2125/doc/s4chap2.htm (1284 words)

	Alfisols (Site not responding. Last check: 2007-11-06)
		Alfisols are well developed forest soils with a subsurface horizon in which clays have accumulated.
		Alfisols are mostly found in temperate humid and subhumid regions of the world.
		Alfisols are very productive soils for agriculture and silviculture.
	envsci.rutgers.edu /~gimenez/SoilsWater01/SoilClassification/sld027.htm (37 words)

	ECOREGIONS Database as Used in the Southern Forest Resource Assessment
		Soils.--The soils are a mosaic of Inceptisols (in alluvial bottom land), Alfisols (in areas of loess), and Mollisols (in areas with swampy vegetation).
		Soils.--Mollisols, Alfisols, and Vertisols are the dominant soils.
		Dry Alfisols are found on the savannas, with Mollisols and Vertisols on the prairies.
	www.srs.fs.usda.gov /sustain/data/ecoregions/index.htm (5182 words)

	alfisols Top 10 Bestselling Search: alfisols
		Alfisols in the semi-arid tropics: Proceedings of the Consultants' Workshop on the State of the Art and Management Alternatives for Optimizing the Pro...
		Dryland management alternatives and research needs for Alfisols in the semi-arid tropics: An interpretive summary of the Consultants' Workshop on the...
		LAC alfisols and ultisols in Eastern Africa: Some problems to their identification and classification
	www.medicum.net /books-alfisols.html (138 words)

	California Chapparal (Site not responding. Last check: 2007-11-06)
		Mollisols, alfisols, and entisols all occur in the region.
		Mollisols are restricted to the steep slopes, high in base content, and lack accumulations of clay.
		The alfisols have clay accumulations and sometimes a carbonate-cemented horizon.
	spuds.agron.ksu.edu /Chapparal.htm (267 words)

	Chapter 33-Ecological Subregions of the United States
		Soils include Alfisols, Andisols, Inceptisols, and Ultisols, in combination with mesic and frigid soil temperature regimes and xeric and udic soil moisture regimes.
		Soils include Alfisols, Andisols, Entisols, Inceptisols, Mollisols, and Ultisols, in combination with mesic, frigid, and cryic soil temperature regimes, and xeric, udic, and aquic soil moisture regimes.
		Soils include Alfisols, Andisols, Aridisols, Entisols, Inceptisols, Mollisols, and Vertisols, in combination with mesic and frigid soil temperature regimes and xeric and aridic soil moisture regimes.
	www.fs.fed.us /land/pubs/ecoregions/ch33.html (3069 words)

	soilorders
		Important for the development of Alfisols is the change between periods of high moisture content and high soil temperature, to break down the primary mineral components and to leach the weathered products, and low moisture content and low soil temperatures, which permit the precipitation or accumulation of the weathered products.
		Most Alfisols are present on relative old landscapes (beginning Holocene or older) whereever the supply of primary minerals is plentiful.
		The suborders of Alfisols are distinguished by soil temperature and soil moisture (Figure 12.1.4).
	www.soils.wisc.edu /courses/SS325/soilorders.htm (15788 words)

	Terrestrial Ecoregions -- Texas blackland prairies (NA0814)
		Alfisols are the important soil order in the San Antonio prairie, while both Alfisols and Vertisols are important in the Fayette prairie.
		Microtopography such as gilgai on vertisols and mima mounds on alfisols are important microhabitats.
		This diversity, which is in part represented by four major prairie community types, is attributable to the ecoregion’s variety of soil orders and their variation in texture and soil pH (Diamond, Riskind, and Orzell 1987; Diamond and Smeins 1985).
	worldwildlife.org /wildworld/profiles/terrestrial/na/na0814_full.html (1712 words)

	Alfisols home
		Alfisols occupy ~9.7% of the global ice-free land area.
		The combination of generally favorable climate and high native fertility allows Alfisols to be very productive soils for both agricultural and silvicultural use.
		Alfisols are divided into 5 suborders: Aqualfs, Cryalfs, Udalfs, Ustalfs, and Xeralfs.
	soils.ag.uidaho.edu /soilorders/alfisols.htm (137 words)

	MLRA \| Arkansas NRCS (Site not responding. Last check: 2007-11-06)
		The soils, dominantly Alfisols and Ultisols, formed in residuum and colluvium from cherty limestone, cherty dolostone and sandstone.
		The soils, dominantly Alfisols, formed in colluvium and residuum from limestone and dolostone, partly mantled with a thin layer of loess.
		The level to gently sloping soils, mainly, Alfisols, Inceptisols, Entisols and Vertisols developed in very deep, loamy, clayey and sandy alluvial sediments.
	www.ar.nrcs.usda.gov /technical/mo16_mlra.html (1325 words)

	SATrends Issue 24 (Site not responding. Last check: 2007-11-06)
		Alfisols are the third most important soil order in the world, covering 13.1% of the world area.
		Because of the erratic rainfall patterns that typify the semi-arid tropics, crop yields on Alfisols are low and unstable.
		Because the water-holding capacity of Alfisols is too low to allow postrainy season cropping, efforts are being made to extend the cropping season through the use of intercropping, relay planting or by shortening the growing season by using short-duration varieties.
	www.icrisat.org /Text/satrends/02nov/1.htm (1655 words)

	Keys to Soil Taxonomy: Suborders (Site not responding. Last check: 2007-11-06)
		Alfisols that have, in one or more horizons within 50 cm of the mineral soil surface, aquic conditions (other than anthraquic conditions) for some time in normal years (or artificial drainage) and have one or both of the following:
		In the horizons that have aquic conditions, enough active ferrous iron to give a positive reaction to alpha,alpha-dipyridyl at a time when the soil is not being irrigated.
		Other Alfisols that have a cryic or isofrigid temperature regime.
	www.pedosphere.com /resources/sg_usa/suborders.cfm?Order_ID=J (217 words)

	Percent of Land Area in Alfisols \| Analysis Products \| State of the Land \| NRCS
		This polygon map shows the percent of land in the Alfisols soil order in each STATSGO map unit.
		Alfisols have a mean annual soil temperature of < 8 degrees C or a base saturation in the lower part of the argillic horizon of 35% or more when measured at pH 8.2.
		A group of soils in the broadest category of the the USDA "Soil Taxonomy." The Soil Taxonomy is a basic system of soil classification for making and interpreting soil surveys.
	www.nrcs.usda.gov /technical/land/meta/m4028.html (319 words)

	ALFISOLS (Site not responding. Last check: 2007-11-06)
		Alfisols - weathered soils, intermediate between mollisols (and spodosols) and ultisols
		This view shows the light colored fields in alfisols looking east from Idaho in the foreground into Wyoming and The Teton Mountains in the background.
		Other alfisols, notably the Xeralfs and Ustalfs, occur in warmer climates and commonly have brighter and redder colors in the argillic horizon.
	www.evsc.virginia.edu /~alm7d/soils/alfs.html (158 words)

	THE SOIL ORDERS (Site not responding. Last check: 2007-11-06)
		Alfisols are mineral soils that have a pedogeni c accumulation of clay in the B horizon and base saturation
		Alfisols may be found in sites of very poor to excessive drainage, although most Alfisols occur in moderately well or poorer.
		Extensive areas of Alfisols have been cultivated in North America and Europe due to their high base status, high water holding capacity, and generally suitable climate.
	www.stthomas.edu /geog/Physgeog/Soils/soil%20intro/SoilOrders.htm (8107 words)

	The role and potential of forage legumes in alley cropping, live mulch and rotation systems in humid and subhumid ... (Site not responding. Last check: 2007-11-06)
		Alfisols, which have high base saturation and are less acid, are characterised by inherently low nutrient (N. K, S and Zn) status and low structural stability.
		In one trial conducted on an Alfisol in southern Nigeria, nutrient yields in leucaena prunings amounted to 10.6 kg P. 153.4 kg K, 73.7 kg Ca and 15.9 kg Mg/ha.
		Although good results were obtained on Alfisols, Faulkner (1934) reported disappointing results on strongly acid Ultisols in southeastern Nigeria, mainly due to poor establishment of the cover crops.
	www.fao.org /wairdocs/ilri/x5488e/x5488e0g.htm (4840 words)

	Untitled (Site not responding. Last check: 2007-11-06)
		Alfisols contain an illuviated clay layer in the subsoil.
		An argillic or clay horizon is required for an alfisol.
		Alfisols are common in humid and subhumid regions.
	www.cst.cmich.edu /users/kiefe1we/reine1jm/pub_html (155 words)

	Alfisols
		Alfisols are soils that have an ochric epipedon (surface layer), an argillic horizon (subsoil with a higher clay content than the layers above), and a moderate to high level of bases.
		Alfisols range from well drained soils on ridges, and knolls to very poorly-drained soils on flats, depressions, and floodplains.
		Some of the more extensive Alfisols in Florida include the Boca, Felda (see photo), Malabar, Meggett, Pineda, and Riviera soils.
	soilpedology.ifas.ufl.edu /Main_Pages/soils_of_florida/alfisols.htm (70 words)

	Ecosystem age and soil order effects on carbon and nitrogen sequestration in Wisconsin CRP prairie plantings (Site not responding. Last check: 2007-11-06)
		However, measurements collected on Alfisols suggested that soil C sequestration rates on the youngest planted prairies (103 ± 163 g C m-2 yr-1) were greater (P < 0.1) than the oldest prairies (10 ± 30 g C m-2 yr-1).
		Results demonstrate that soil C and N sequestration and BD changes were larger and occurred more rapidly after the initiation of prairie plantings on Alfisols than Mollisols.
		While the statistical significance of results may have been hindered by small sample sizes, soil order and ecosystem age should still be considered in the future as important controls over soil C and N accumulation rates as part of CRP prairie restorations in the Midwest.
	www.sage.wisc.edu /pubs/abstracts/kucharikAmMidNat2005.html (318 words)

	Delineation of crop residue patterns in selected Indiana mollisols and alfisols using AVIRIS data
		It is located in the northwest part of the county on a nearly level loess-mantled Wisconsin age glacial till plain.
		Five major soil map units which contain both Alfisols and Mollisols occur in the sample fields (Table 1).
		These features included: bare darker colored Mollisol soils; bare lighter colored Alfisol soils; approximately 50 percent soybean residue with a) darker and b) lighter soils; approximately 50 percent corn residue with a) darker and b) lighter soils; and 100 percent green vegetation cover.
	libraries.maine.edu /Spatial/gisweb/spatdb/acsm/ac94086.html (2786 words)

	[No title]
		Lianas such as wild grape, poison ivy, and Virginia creeper climb the trees to flower and fruit high in the forest canopy.
		Ultisols replace alfisols in the southeastern US, where the older soils of unglaciated regions have been weathered to a much greater degree and are more completely leached than the younger soils to the north.
		Ultisols are generally less fertile than alfisols and in the southeast were frequently further degraded under plantation and subsistence agriculture in both the colonial and post-colonial periods.
	www.runet.edu /~swoodwar/CLASSES/GEOG235/biomes/tbdf/tbdf.html (935 words)

	Regional Landscape - Highlighted by Ultraseek (Site not responding. Last check: 2007-11-06)
		SOILS: Soils are derived from loamy and sandy till and sandy outwash; loamy soils are the most common.
		Mollisols formed under prairie vegetation, and Alfisols formed under forest vegetation.
		The most common Mollisols are Udolls, Borolls, and Aquolls; the common Alfisols are Boralfs, Udalfs, and Aqualfs (Cummins and Grigal 1981).
	search.usgs.gov /highlight/cs.html?url=http%3A//www.npwrc.usgs.gov/resource/1998/rlandscp/s3-1-1.htm&fterm=%22Overgrazing%22&fterm=Overgrazing&la=en&charset=iso-8859-1&qt=%22Overgrazing%22+Overgrazing&col=top2000+usgs&n=1&search=../query.html%3Fcharset%3Diso-8859-1%26ws%3D1%26si%3D0%26col%3Dtop2000%2Busgs%26qt%3D%2522Overgrazing%2522%2BOvergrazing (710 words)

	[No title]
		In this frame of reference, the acid soil can be considered as a continuum from the slightly leached and weathered Mollisol through the progressively more leached and weathered Alfisols and Ultisols to the highly leached and weathered Oxisols (Table 1).
		With more leaching and greater concentration of H ions, the hydroxyls associated with the Al ions are neutralized leaving Al as the predominant form of exchangeable acidity.
		The causes of favorable response to lime and the adverse effects on the soil of overliming are listed in the table in decreasing order in which each is most likely to occur.
	pubpages.unh.edu /~harter/mclean.htm (2937 words)

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