AGRY 565 Exam I

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Author:
MRK
ID:
236478
Filename:
AGRY 565 Exam I
Updated:
2013-09-30 12:31:20
Tags:
Soil Classification
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Description:
Classification terms
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  1. Class, Category, Individual, Population
    Individual < Population (all individuals) < Class (similar individuals) < Category (similar classes)
  2. Soil delineation
    • area enclosed by a line (soil boundry)
    • Approximates a poly pedon
    • contines inclusions (up to an acre)
  3. Approximate number
    Order:
    Suborder:
    Great Group:
    Subgroup:
    Family:
    Series:
    • 12 Alfisol
    • 64 Aqualf
    • >300 Fragiaqualf
    • >2,400 Aeric Fragriaqualf
    • ~7,000 fine-silty mixed, active, mesic Aeric Fragiaqualf
    • >19,000
  4. Aquic
    • Moisture regimes
    • saturated several weeks each year
    • gray colors
    • receives run-on
  5. Perudic
    • Moisture Regimes
    • very humid climated
    • very moist year round
  6. Udic
    • Mositure Regimes
    • humid climate
    • surplus of water (little to now surplus)
    • Don't need irrigation for Corn
  7. Ustic
    • Semi-arid climate
    • need irrigation for Corn
  8. Aridic
    • Desert climate
    • need to irrigate to grow anything
  9. Xeric
    • Mediterranean- wet winter, dry summer
    • good for grapes
  10. Episaturation
    Endosaturation
    Anthric saturation
    Oxyaquic
    • perched water table (dense till)
    • wet throughout
    • perched water table (man)
    • wet but no reduction on till bevels
  11. Fine-silty, mixed, active, mesic
    • family particle size
    • mineralogy
    • clay activity (CEC/g clay)
    • temperature
  12. Cratonic Rocks
    • Igneous and metamorphic
    • exposed in Canada
    • 3,500-20,000 deep in IN
  13. Interior Platform
    • Mid-west
    • covered with deposits 650-290 mil yrs ago
    • mostly limesotnes, sandstones, and shales
    • sediments were originally level
  14. Sedimentary rocks in IN
    • Oldest Ordovician age (44-488 mil yrs ago)
    • Youngest Pennsylvanian Age (299-318 mil yrs ago)
    • Before dinosaur fossils
  15. Why classify soils (3)
    • Organize knowledge
    • Understanding relationships
    • remember properties
  16. Individual
    A polypedon or pedon
  17. Guide line for Soil Taxonomy
    • – Natural classification
    • – Comprehensive
    • – Based on soil properties
    • - Prefer subsurface properties
  18. Umbric
    like a mollic but below 50% B.S.
  19. Quilifications for Mollic epipedon
    • Good structure
    • 3/3 or darker
    • at least 25 cm
    • higher than 50% B.S.
    • Does not fit other properties

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