Lecture 25 Morphology and Orders

Lecture 25 Morphology and Orders - Exam III Wednesday,...

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1 Exam III Wednesday, November 7 th Study Guide Posted Tomorrow Review Session in Class on Monday the 4 th Soil Taxonomy and Classification Albic Kandic Argillic Spodic Oxic Diagnostic Horizons Diagnostic Horizons Mollic Umbric Ochric Histic Melanic Plaggen Anthropic Epipedons Subsurface
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2 Surface Horizons: Mollic- thick, dark colored, high %B.S., structure Umbric – same, but lower B.S. Ochric – pale, low O.M., thin Histic – High O.M., thick, wet, dark Sub-Surface Horizons: Argillic – illuvial accum. of clay (high activity) Kandic – accum. of clay (low activity) Spodic – Illuvial O.M. accumulation (Al and/or Fe) Oxic – highly weathered, kaolinite, Fe and Al oxides Albic – light colored, elluvial, low reactivity Elluviation (E horizon) Organic matter Clays Spodic horizon Bh horizon Bt horizon Argillic horizon Elluviation Elluviation and and Illuviation Illuviation A E Bh A Bt E
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3 Soil Taxonomy Soil Taxonomy Diagnostic Epipedons Diagnostic Subsurface horizons Moisture Regimes Temperature Regimes Age Texture Depth Order Suborder Great group Sub group Family Series 12 19,000 Soil Taxonomy Soil Taxonomy Soil forming processes, presence or Absence of major diagnostic horizons Similar genesis 63 250 1400 8000 Grasslands – thick, dark epipedons High %B.S. Soil Orders Entisols Histosols Inceptisols Andisols Gelisols Aridisols Vertisols Alfisols Mollisols Ultisols Spodosols Oxisols
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4 Soil Orders Soil Orders Entisol Histosol Inceptisol Alfisol Ultisol Spodosol Mollisol Oxisol Andisol Gelisol Aridisol Vertisol Ent- Hist- Incept- Alf- Ult- Spod- Moll- Ox- And- Gel-
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This note was uploaded on 07/31/2011 for the course SOS 3022 taught by Professor Staff during the Fall '08 term at University of Florida.

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Lecture 25 Morphology and Orders - Exam III Wednesday,...

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