Topic 2) Soil Formation and Soil Properties Flashcards
(25 cards)
What is the upperboundary of soil?
is the bounday between soil and air, shallow
What is the term for characterizing units of soil?
Pedons
What is the term for groups of Pedons
Polypedon
What is weathering?
Is the proces of breaking up rocks and modifies or even destorys physical and chemical properites
What are the 3 three rock types?
Igneous (volcanic origin)
Sedimentary ( Weathering products)
Metamorphic (Formed with extreme pressure/temperatures
What are the two types of weathering?
Physical weathering
biogeochemical weathering
What is the Hans Jenny Equation?
Soil= climate, organisms, relief, parent material, and temperature
What is parent material?
The material from which soils are formed though varous processes
Residual Parent Material
Deveploed from the underlying rock
What is Cumulose
Organic Deposits that have devopled from plant ressudes
Ususally assoicauted with a high water table
Colluvial Debris
Poorly sorted rock fragmenets carried downslope
Alluvial Debris
found in floodplains and Deltas
Coastal sediments
Build-up of sediment that can be explosed for short periods of time
Glacial Till
Heterogenous, unstrafifed mixtures of debris
Lacustrine Deposits
Depoists from bodies of standing water
Aeolian Materials
Enormous quanitites of material can be picked up by the wind
Loess
Mostly Silt sized particals
High Fertility soils but suscpetible to erosion
Efficientive Preciptiation
Water is required for weathering
Effect of Temperatre
The warmer it is the more activity is found in that area
Relief
Configuarion of land surface
Time
Rates of weathing are slow
Translocation
Movement from horzien to horzen
Transfomation
from X to Y
Addition
adding materials from an outside souce
