Which Process not Only Controls Erosion, but Can Also Help to Replenish Soil Nutrients

The initial degradation of plants by microarthropods, bacteria, and fungi occurs in the __________ soil horizon. - O soil horizon Which of the following practices does very little to control soil erosion? - industrial monoculture agriculture Which soil horizon is most depleted through erosion? - A Soil horizon The practice of "intercropping," planting multiple crop species in the same plot, reduces soil erosion, can add nutrients to the soil, and __________. - can reduce pest damage on crops Question 5:Which of the following statements best describes the benefits of using organic fertilizers? - Organic fertilizers increase humus in soils. Desertification of soil __________. - can be caused by overgrazing The texture of soil depends on its mix of particle sizes. Which of the following combinations of particle sizes would be classified as a loam? - 40% sand, 40% silt, and 20% clay Which process not only controls erosion, but can also help to replenish soil nutrients? crop rotation Overirrigation in dry areas can cause __________. - a buildup of salt in the soil to the point where it negatively affects plant growth Which of the following practices leads to the greatest amount of soil erosion from one location? - clear-cutting trees from hillsides Which of the following describes the cycle of agriculture and sedentary lifestyles? - a positive feedback cycle Erosion usually begins when __________. - the vegetation is removed either naturally or by humans How does the Conservation Reserve Program (CRP) try to protect soil for future agriculture? - The CRP pays farmers not to grow crops on land that is not very well suited for crop production. The Dust Bowl that afflicted the United States in the 1930s led to many changes in farm policy from the federal government. These policies tried to address the farming practices that led to the Dust Bowl by tailoring agricultural practices to the specific conditions in an area. Which of these did NOT contribute to the Dust Bowl? - Massive industrial agriculture operations disturbed the soil with large, petroleum-powered equipment. The type of agriculture that occupies more than 25% of the world's croplands and dominates farms in the Midwest is __________. - industrial agriculture A consequence of the __________ was the use of pesticides, fertilizers, and monocultures. - Green Revolution Which of the following situations would be most apt to form new, healthy soil? - a warm, moderately wet climate with many decomposers Which of the following horizons of soil would most likely contain the most minerals? the B horizon Which of the following types of soil would allow water and minerals to move most quickly through it toward the lower soil horizons? - sand Weather can dramatically affect a farmer's yield. Government subsidies to farmers can compensate for this risk but may lead to __________. - undervalued produce How has the U.S. government changed its views of wetlands over the past 40 years? Historically, we have encouraged the draining of wetlands to make room for agriculture. Recently we have reversed this policy and are trying to restore wetlands. What type of legislation has encouraged farmers to adopt soil conservation practices in order to receive government subsidies? - farm bills Farmers expecting to receive subsidies through the Conservation Reserve Program would __________. - receive a high score on an environmental benefits index Which of the following soil horizons is most crucial to both agricultural and ecosystems? - A horizon Swidden agriculture is necessary in rainforests for all of the following reasons EXCEPT __________. - the soil of rainforests is not suitable for forest growth