DUCKS UNLIMITED FINAL EXAM QUESTIONS
& CORRECT ANSWERS
Tillage is primarily used for which of the following? - ANSWER-Control weeds and aerate soil
How much of the earth's land surface is covered with grasslands? - ANSWER-20 to 40 percent
Select all the services grasslands provide - ANSWER-Provide very important habitat for wildlife Filter runoff from precipitation Build deep and rich soils Store carbon dioxide from the atmosphere
Grasslands typically exist between which of the following? - ANSWER-Forest and desert
Which of the following is NOT a main threat which plagues grasslands today? - ANSWER-Lasting effects from Dust Bowl
When topsoil is lost, the loss is fairly permanent because the process to create just three centimeters of topsoil takes about 1,000 years. - ANSWER-True
Which of the following best describes the Farm Bill? - ANSWER-Incentives provided to landowners to conserve grassland habitats 1 / 2
Where are savannas typically found? - ANSWER-Africa, Australia and South America
Which of the following is the specific mission of the Natural Resources Conservation Service? - ANSWER-To conserve soils for agricultural production
Why do temperate grasslands have the most fertile soil on earth? - ANSWER- Grass roots decaying below the surface enriches the soil with nutrients
A wetland with woody plants, saturated/slow moving water and a lack of oxygen in the soil can be described as a _____. - ANSWER-Swamp
Select all the factors in which a wetland is classified. - ANSWER-Hydrological regime Landscape position Vegetation cover
Wetlands are economically important due to which of the following factors? - ANSWER-Wetlands provide both commercial and recreational fisheries
Wetlands are NOT critical for which of the following? - ANSWER-Developing agricultural land
Levees are most commonly used for which of the following? - ANSWER-Stopping water from naturally changing course
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