Soil Conservation

Approximately how many years does one centimeter of topsoil take to form?

Plowing along elevation lines is known as _________________________

Which definition fits EROSION?

The most critical factor to protect our soils from wind/water erosion is:

Planting trees along edges of fields provides:

This horizon contains the parent material (usually bedrock).

Wind Abrasion is an example of which type of weathering?

1 hectare =  ___________ acres

When discussing soils, humus can best be described as __________________________

What was the number one cause of the Dust Bowl? 

Weathering rates are faster in _______________ climate.

The layers of soil are called _________________?

Rates of weathering depend on which 3 factors?

This horzion contains weathered rock pieces from the parent rock. 

If present, this horizon contains humus

What does anthropogenic mean?

Physical abrasion changes the composition of the substance.  True OR False?

Which of the following is found in the greatest % in soil?

The cross-section of soil is called  the soil's ______________.

What does elucidate mean?

Crops that are planted in rows parallel to land contours are called:

This horizon is known as the subsoil and holds nearly all of the minerals

Which layer of a soil profile forms first from the bedrock?