335-340 Flashcards
soil
uppermost layer of the earths crust, supports terrestrial plants, animals and microorganisms
parent material
siol is born from rock that has been slowly brooken down
weathering process
physical, rock is worn down smaller by weather
topography
regions surface features, such as mountains/valleys
soil organic material
litter, poop dead remains, animals/plants, microorganisms in stages of decomposition
humus
black or dark brown organuc material that remains after decomposition has occured
soil water
pores among and around soil particles filler with water 25%
soil air
pores in soil filled with air 25%
leahces
roots have them, pores?
illuviation
deposition of leahced material in the lower layers of soil
soil horizons
horizantal layers which soils are organized, from the surface to the underlying parent material
soil profile
vertical section from surface to parent material showing the soil horizons
O horizon
uppermost layer, rich in organic material, accumulation of plant littler
A horizon
tpsoil, dark and rich in organic matter and humus, under O
E horizon
havily leached, under A
B horizon
accumulation of clay and nutrient minerls, lighter color, under E
C horizon
weathered pieces of rock, often saturated with goundwater, under B
solid parent material
bedrock, under C
eosysten services
important environmental benifits that ecosystems provide people
castingss
bits of soil that have passed through the gut of an earthworm are deposited on the soil service. butrients from lower leves are brough to top of soil
mycorrhizae
relationship between fungi and roots of vascular plants halp plants absort soil nutrients
mycelium
fungi partner extends into the soil much beyond its roots
nutrient cyling
pathway of various nutrient minerals or emelets from the environment through organisms and back to the environment
great green wall
many trees plantes to stop dust storms in china
