Flashcards
plt 231ch1-3
Flashcards do conjunto (15)
- 13 types of rocks smiSedimentary, Metamorphic, Igneous
- 2physical weatheringUnloading,Temperature,Abrasion
Biological Activity - 3Biogeochemical Weathering ProcessesHydration,Hydrolysis,Dissolution
Carbonation,Oxidation-Reduction - 4Factors Influencing Soil Formation CLORPTparent materials, time, topography, organisms, climate
- 5More CLORPTOrganisms
Especially vegetation, microbes, and soil animals
Relief
Slope, aspect, and landscape position
Parent Material
Geological or organic precursors to the soil - 6Effects of Parent MaterialThe parent material is what the soil and the nutrients ultimately come from
Examples
Colluvium Alluvium Floodplain
Glacial Marine Sediments
Loess Organic Bogs - 7Effects of ClimateEffective Precipitation
Depends on timing, topography, and soil type
Temperature
Effects the rate of weathering - 8Effects of TopographySlope and Aspect
Determines amount of solar radiation absorbed
Parent Material Interactions
Affects the distribution of colluvium and alluvium - 9TopographySalt Buildup
Arid areas slats are leached from relatively higher areas to lower areas
Interaction With Vegetation
Moisture regime is affected by microtopographic changes which in turn controls vegetation distributions - 10Effects of TimeAll soil forming processes occur over a very long period of time
The time it takes to develop a soil is relative, dependent upon
Climate
Vegetation
Human Interaction - 11Four Basic Processes of Soil Formation TTALTransformation
When soil constituents are chemically or physically modified or destroyed and others are synthesized from precursor materials
Translocation
The movement of organic and inorganic materials horizontally or vertically across a pedon - 12AL isu.indstate.edu/jspeer/soils/ppchap1Additions
Inputs of materials from outside sources (i.e. plant litter)
Losses
Materials that are removed from the soil profile by leaching or erosion - 13Soil Horizons OAEBCRO Horizons
Organic horizon at the soil surface, usually unconsolidated organic material - 14ABEA Horizons
Mineral horizon formed at or near the surface where humified organic matter is associated with mineral materials. Usually darker in color because of the organic matter.
E Horizons
mineral horizon just below the soil surface - 15CRB Horizons
A subsurface mineral horizon resulting from (1) the change in situ of soil material C Horizons
Unconsolidated or weakly consolidated mineral horizon that retains evidence of rock structure, but lacks diagnostic properties of the overlying A, E, and B horizons.
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- FlashCards sobre plt 231ch1-3, criado por emma Garcia em 01-10-2015.
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- emma Garcia
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