Ducks Unlimited Final Tests Questions & Answers, 100% Correct

Ducks Unlimited Final Tests Questions & Answers, 100% Correct-Tillage is primarily used for which of the following? - Control weeds and aerate soil How much of the earth's land surface is covered with grasslands? - 20 to 40 percent Select all the services grasslands provide - 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? - Forest and desert Which of the following is NOT a main threat which plagues grasslands today? - 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. - True Which of the following best describes the Farm Bill? - Incentives provided to landowners to conserve grassland habitats Where are savannas typically found? - Africa, Australia and South America Which of the following is the specific mission of the Natural Resources Conservation Service? - To conserve soils for agricultural production Why do temperate grasslands have the most fertile soil on earth? - 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 _____. - Swamp Select all the factors in which a wetland is classified. - Hydrological regime Landscape position Vegetation cover Wetlands are economically important due to which of the following factors? - Wetlands provide both commercial and recreational fisheries Wetlands are NOT critical for which of the following? - Developing agricultural land Levees are most commonly used for which of the following? - Stopping water from naturally changing course