Topography
The shape of the land.
What is topography?
Forms as rock is broken down by weathering and mixes with other materials on the surface.
What is soil?
A dark colored substance that forms from and animal remains decay.
What is humus?
The thick mass of roots and the surrounding face of soil.
What is sod?
It can be eroded or exhausted.
How can soil be damaged?
elevation, relief, and landforms
What is topography determined by?
The solid layer of rock beneath the soil
What is bedrock?
A soil that is made up of equal parts of clay, sand, and silt.
What is loam?
Plowing removed grass from the Great Plains and exposed the soil. In times for drought, the topsoil quickly dried out, turned to dust, and blew away
What caused the Dust Bowl?
The material that keeps the soil in place
What is sod?
plains, mountains, and plateaus
What are the three main landforms?
How fast does soil form?
A layer of soil that differs in color and texture form the one above it.
What is a soil horizon?
Dead weeds and crops form the previous years harvest are left in the ground.
What is conservation plowing?
Water and wind
what types of erosion erode soil?
costal and interior
What are the two types of plains?
First the C horizon, then the A horizon, and lastly the B horizon.
In which order do the horizons form?
The largest soil particle.
What is gravel?
The practice of plowing fields along the curve of a slope
What is contour plowing?
Used peanuts to help the soil regain fertility
Who is George Washington Carver?
A landform with high elevation and low relief
What is a plateau?
The animals in the soil produce nutrients like humus and mix the soil so water and air can get in.
How does soil keep forming?
In the northern part, northern forest soil, and the southern part, at the very bottom, prairie soils.
What soils are found in Wisconsin?
Everything that lives on land depends directly or indirectly on soil.
Why is soil one of Earth's most valuable resources?
One eighth
How much of the land on Earth has good farming soils?