The primary purpose of conservation tillage is to
A. incorporate organic material into the soil.
B. allow surface water to flow more evenly.
C. reduce the number of times a field is plowed.
D. add nutrients to the soil.
Answer: C
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What approach do many analysts call for in approaching our waste problems?
A. Waste management only B. Waste reduction only C. Integrated waste management D. Reusing only E. Recycling only
Because of their specific effects exerted by mimicking hormone chemical structure and function, hazardous chemicals that are endocrine disruptors will cause abnormal events in
A) the musculoskeletal system. B) digestion and absorption of foods. C) growth, metabolism, and reproduction. D) vision, hearing, and taste.
Which of the following statements is about tsunami in the deep ocean?
A. They only "feel" the bottom if it is less than 4,000 meters deep. B. They never "feel" the bottom. C. They only "feel" the bottom if it is less than 3,000 meters deep D. They are always "feeling" the bottom. E. They only "feel" the bottom if it is less than 5,000 meters deep.
What kind of stress is responsible for creating fault-block mountains?
A) Compression B) Tension C) Shear