Advertisement Upgrade to remove ads

A horizon

topsoil horizon that is generally gray to black, contains the remains of living things (humus)

B horizon

subsoil horizon that is generally red or brown

bedrock

solid unweathered rock lying beneath surface deposits of soil

C horizon

beneath the B-horizon and above the bedrock

clay

a natural, earthly material that retains its shape and hardens when fired

crop rotation

the system of growing a different crop in a field each year to preserve the fertility of the land

desertification

The transformation of arable land into desert either naturally or through human intervention

Dust Bowl

term used for the central and southern great plains during the 1930s when the region suffered from drought and dust storms

E horizon

a soil layer from which minerals are leached as water percolates through the soil

intercropping

Growing two or more different crops at the same time on a plot.

leaching

removal of dissolved materials from soil by water moving downwards

loam

a rich soil consisting of a mixture of sand and clay and decaying organic materials

monoculture

farming strategy in which large fields are planted with a single crop, year after year

Natural Resources

Raw materials supplied by nature

Conservation Service

A service that is helping to conserve the resources and farms

No Till Agriculture

This is where the land isn't plowed and herbicide is used to kill some weeds and some are left.

O horizon

Organic top layer, Surface plant and animal litter forms hummus.

parent material

material from which a soil is formed, determines composition and properties of the soil

R horizon

bedrock

salinization

Accumulation of salts in soil that can eventually make the soil unable to support plant growth.

sand

a loose material consisting of grains of rock or coral

shelterbelt

a barrier of trees and shrubs that protect against the wind and reduces erosion

silt

mud or clay or small rocks deposited by a river or lake

soil profile

a vertical section of soil from the ground surface to the parent rock

terracing

carving small, flat plots of land from hillsides

weathering

The breaking down of rocks and other materials on the Earth's surface.

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set