Order Suborder Meaning of Suborder Major Land Uses Fertility
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1 Ent isols = recent, little if any profile development. Youngest soil. Aquents wet Wetlands, crops moderate Found --SW Texas, Rocky MT. Region, FL, AL, GA, Nebraska--sandy. Arents mixed horizons Fluvents Flood plains Crops moderate Orthents true; common ones Forest, range, crops Low -- moderate Psamments Sand textures Crops, range Low Incept isols = Few diagnostic features: Inception of B horizon. human presence of anthropic epidon Anthrepts Found --Mountain areas especially in the tropics, and in Asia. Southern NY, central & western Pennsylvania, W. Virginia & E. Ohio. Aquepts wet Crops Low-----high Cryepts cold Tundra, forests Moderate Udepts humid Crops, forests Low--moderate Ustepts dry climate Forests, range Low-----high Xerepts dry summer; moist winter Range, forests Mderate--high
2 And isols = Volcanic ash and cinders. Young soils. Aquands wet Found --Pacific rim area. Cry ands cold Tundra, forests Moderate Torrands hot & dry--usually dry Ud ands humid Ustands burnt, dry climate Vitrands resembling glass Xerands dry summers, moist winters Forest, range, crops Moderate Gel isols = Permafrost and Frost Churning. Mr.Freeze. Histels (tissue)-presence of histic epipedon Bogs Moderate Found --Northern Russia, Canada and Alaska. Orthels true; the common one Tundra Moderate Turbels distribution; cryoturbation Tundra Moderate Vert isols = Dark, swelling and cracking clays. Aquerts wet Wetlands, crops High Found --Ethiopa, India, Sudan and north & east Australia. Cryerts cold Eastern Mississippi, western Alabama, SE Texas, Dakotas & California. Uderts humid Crops High Userts burnt--dry climate Crops, range High Xererts Dry summers; moist winters
3 Hist osoils = organic soils with out permafrost. Fibrists fiber; least decomposed stage Found --cold wet region; Alaska, Canada, Finland and Russia. Folists (folia=leaf)---mass of leaves Hemists (hemi=half)--intermediate stage of decomposition Wetlands, crops Moderate--high Saprists (sapos=rotten)--most decomposed stage Wetlands, crops High Arid isols = Dry soils Argids argillic horizon (With illuvial white clay) Crops, range Low--moderate Found --mostly western region of U.S. So. CA,Nevada, AZ, & central New Mexico. Calcids Lime (calcic horizon) Range Low Sahara desert, Gobi and Taklamakan deserts. cambric horizon (cambriare=to change) Crops, range Low Cambids Cryids cold Range Low Durids hard Range Low Gypsids gypsum==gypsic horizon Range Low Salids salt==salt horizon Range Low
4 Spod osols = Acid, sandy, forest soils, low bases. Aquods wet Forests Low Found --NE U.S., northern Michigan & WI and southern Alaska. Cryods cold Forests Low Humods humus--earth-----presence of organic matter Orthods true---the common ones Forests Low Moll isols = Dark, soft soils of Grassland. Albolls white clay; albic horizon Found --Great Plains, Illinois. Aquolls wet Crops, wetlands High Cryolls cold Crops, range High Rendolls high in carbonates Udolls humid Crops High Ustolls burnt; dry climate Crops, range High Xerolls dry summers, moist winters Crops, range High Alf isols = Argillic or Natric horizon, medium to high bases. Aqualfs wet Crops, forests High Found --OH, IN, MI, WI, MN, PA and NY. Cryalfs cold Forests High Udalfs humid Crops, forests High Usalfs summer Crops High Xeralfs dry summer, moist winter Range High
5 Ult isols = Argillic horizon, low bases. Aquults wet Forest Low--moderate Found --SE part of U.S. Humults earth; presence of organic matter Udults humid Forest, crops Low Ustults summer Forest, crops Low Xerults dry climate, moist winters Ox isols = oxic horizon, highly weathered. Oldest soils. Aquox wet Found --mostly tropics, So. America and Africa. Perox thru-out time; year round humid climates Forest Low Torrox hot and dry; usually dry Udox humid Forest, crops Low Ustox summer Forest, crops Low
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