Weathering
EROSION
SOIL PROFILE
AGRICULTURE
Massmovent
100
Two types of weathering
What is Physical/mechanical and Chemical?
100
The movement of sediments from one place to another
What is erosion?
100
A soil profile contains one or more of these sections.
What are soil horizons?
100
Two general types of farming practices.
What is Traditional (conventional, industrial) and Sustainable (regenerative, organic)?
100
The movement of sediments down a slope due to the force of gravity
What is mass movement?
200
Rock breaking apart by plants roots
What is an example of physical weathering?
200
One way to avoid soil erosion
What is plant cover crops to hold the soil in place, no till farming, shelterbelt, contour plowing, etc.?
200
This horizon is made up of bedrock and contributes parent material to the horizon above it.
What is the C horizon?
200
A single plant species cultivated in a large area of land.
What is a monoculture?
200
The slow mass movement of soil down a hillside.
What soil creep?
300
The breaking down of rock by acid rain
What is an example of chemical weathering (carbon?
300
Event that occured in the 1930's due to poor farming practices and drought
What is the dust bowl?
300
This horizon is commonly called subsoil.
What is the B horizon?
300
A planned cropping sequence with different crops planted each year.
What is crop rotation?
300
Evidence of this mass movement = Bent tree trunks & slanted fence or telephone posts
What is soil creep?
400
Water seeping into the cracks of rocks and freezing, then thawing, freezing, thawing, until the rocks breaks apart.
What is ice wedging or frost action?
400
One way to avoid river bank erosion
What is plant vegetation along the edge of the bank, build a rock wall along the bank, decrease overgrazing of cattle near rivers?
400
This horizon is characterized by darker color rich in decomposed organic material
What is the O horizon (humus)?
400
Sustainable Farmers can use this to add nutrients and organic matter to soil.
What is animal waste?
400
The sudden movement of a mass of rock, debris, or earth down a slope.
What is landslide?
500
type of weathering shown
What is wind abrasion?
500
Why should farmers be concerned about soil erosion?
1 cm of soil takes 100-400 years to form, farmers need soil to crow crops, must maintain and conserve the soil today so that it remains for future generations
500
Common name for the A horizon
What is topsoil?
500
Two problems with monocultures
What is loss of biodiversity, crops suseptible to diseases, lack of nutrients in the soil,?
500
Masses of snow, ice, and rocks that fall rapidly down a mountainside
What is an avalanche?