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College Soil Questions

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College Soil
Which of the following is not true for soil?
  1. has decaying material that supplies nutrients to primary producers in the same ecosystem
  2. pesticide, fertilizers, growth hormones, antibiotics, water, and fossil fuels are relatively quickly removed
  3. a complex system consisting of disintegrated rock, organic matter, water, gases, nutrients, microorganisms
  4. a renewable resource that can be depleted if abused
  5. soil is the foundation for agriculture
College Soil
Factors involved in soil formation are
  1. nitrogen-fixing bacteria, grazing by herbivores, tropical storms
  2. erosion, leaching
  3. frequent wildfires, wind, temperatures above 100 degrees F
  4. weathering of parent material, freezing/thawing, tree roots
  5. seasonal changes in tides, earthquakes
College Soil
Humus is
  1. artificial fertilizer applied to monocultures
  2. composed or organic matter and is necessary to fertility and holding soil moisture
  3. found in the E layer of a soil horizon
  4. the result of agricultural runoff into waterways or ground water
  5. one of the primary causes of desertification
College Soil
Factors involved in soil formation are
  1. nitrogen-fixing bacteria, grazing by herbivores, tropical storms
  2. erosion, leaching
  3. weathering of parent material, freezing/thawing, tree roots
  4. frequent wildfires, wind, temperatures above 100 degrees F
  5. seasonal changes in tides, earthquakes