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PLSC 204 Exam 1 questions well answered 100% correct
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PLSC 204 Exam 1 questions well answered 100% correct
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PLSC 204 Exam 1 questions wellanswered 100% correct
Horizon layers - correct answer ✔✔O: organic matter
A: organic coated minerals (sand, silt, clay), dark colored
E: eluvial horizon (material moved out by water movement), light colored/bleached appearance
B: rich in accumulated clays/oxides, subsoil
C: "parent material", non-soil, unconsolidated
R: hard rock
Pneumonic device to remember elements in soil - correct answer ✔✔C.B. HOPKiNS CaFe, Co.
Closed Monday Morning and Night See You Zoon, Mg.
Soil forming factors - correct answer ✔✔Parent material, climate (temperature and precipitation), biota
(living organisms and organic material), topography, time
Four basic processes of soil development - correct answer ✔✔Additions: water, nutrients, energy, fixed
(organic matter)
Losses: leaching, erosion, nutrient removal (harvesting)
Transformations: dissolution, formation of secondary minerals, decomposition of OM
Translocations: eluviation/illuviation (clays, OM, salts), transport/mixing
Epipedons - correct answer ✔✔Diagnostic surface horizons, Mollic and Ochric
Mollic - correct answer ✔✔Thick, dark, a lot of organic matter
Ochric - correct answer ✔✔Too thin to be mollic, not a lot of organic matter
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