soil types
What type of soil can hold a lot of water and stay together well
clay
what is the o horizon
it the organic layer!
What one type of dead organic matter
rodents,decomposers
what causes frost wedging
water freezes that expands in cracks
how dose clay compare to silt
clay holds water better and and is better than silt for planting
what type of soil is worst for planting
gravel
What is parent rock?
slightly weathered rock
What is one type of mineral found in organic matter
Nitrogen, phosphorus, sulfur, potassium, or magnesium!
What causes abrasion
wind water ice!
What is the first layer of soil
the O horizon (organic layer)
what type of soil is found on beaches and is bad for growing plants?
Sand
What brown substance is found on top of the o layer
humus
What horizons are organic matter found in
the O and A horizon
what causes thermal expansion
heat induced cracking
How do decomposers help the soil
by breaking apart complex organic materials
What type of soil is second best at holding water
silt
What is r horizon made of
bedrock!
What is one type of material found in trees and in hummus
leaves
what causes salt crystallization
Salt growth breaking rock
How many layer are there in the soil profile
4-5 layers
What type of soil is best for decomposers
loam
What decomposers live in top soil? (name 4)
Bacteria, fungi, earthworms, and millipedes
What is a crucial ingredient found in organic matter
humus
what causes oxidation
chemical rusting
What is the scientist that studies soil
a pedologist