Answers
Control weeds and aerate soil Tillage is primarily used for which of the following?
How much of the earth's land surface is covered with
20 to 40 percent
grasslands?
Provide very important habitat for wildlife
Filter runoff from precipitation
Select all the services grasslands provide
Build deep and rich soils
Store carbon dioxide from the atmosphere
Forest and desert Grasslands typically exist between which of the following?
Which of the following is NOT a main threat which plagues
Lasting effects from Dust Bowl
grasslands today?
When topsoil is lost, the loss is fairly permanent because
True the process to create just three centimeters of topsoil takes
about 1,000 years.
Incentives provided to landowners to conserve grassland
Which of the following best describes the Farm Bill?
habitats
Africa, Australia and South America eries
To conserve soils for agricultural production
Grass roots decaying below the surface enriches the soil
with nutrients
Swamp
Hydrological regime
Landscape position
Vegetation cover
Wetlands provide both commercial and recreational fish-
, Where are savannas typically found?
Which of the following is the specific mission of the
NaturalResources Conservation Service?
Why do temperate grasslands have the most fertile soil
onearth?
A wetland with woody plants, saturated/slow moving
wa-ter and a lack of oxygen in the soil can be described
as a
.
Select all the factors in which a wetland is classified.
Wetlands are economically important due to which of
thefollowing factors?