Ducks Unlimited Final tests with best solutions

Ducks Unlimited Final tests with best solutions Tillage is primarily used for which of the following? -Correct Answer-Control weeds and aerate soil How much of the earth's land surface is covered with grasslands? -Correct Answer-20 to 40 percent Select all the services grasslands provide -Correct 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? -Correct Answer-Forest and desert Which of the following is NOT a main threat which plagues grasslands today? -Correct 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. -Correct Answer-True Which of the following best describes the Farm Bill? -Correct Answer-Incentives provided to landowners to conserve grassland habitats Where are savannas typically found? -Correct Answer-Africa, Australia and South America Which of the following is the specific mission of the Natural Resources Conservation Service? -Correct Answer-To conserve soils for agricultural production Why do temperate grasslands have the most fertile soil on earth? -Correct Answer-Grass roots decaying below the surface enriches the soil with nutrients