Exam 10: Food, Soil, and Pest Management

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There are no technological substitutes for fertile and uncontaminated topsoil.

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True

Which of the following is not one of the three major types of organic fertilizer?

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B

Numerous practices have been developed to deter ____________________, including reducing or eliminating tillage, managing irrigation to reduce runoff, and keeping the soil covered with plants or mulch.

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soil erosion

Research shows that, on average, low-input polycultures produce higher crop yields than high-input monocultures.

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The majority of soil organic matter is concentrated in the

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It is well-documented that while some synthetc pesticides have caused great harm to living creatures, others have saved lives. Give a brief account of one that has, ironically, saved human lives: DDT.

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Which of the following problems with nutrition do you think is most prevalent in the United States?

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Government subsidies to fishing fleets

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Which choice reflects the correct sequence of animal efficiency at converting grain into protein, from the most efficient animal to the least?

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A(n) ____________________ is a chemical used to control or kill populations of organisms that we consider undesirable such as insects, weeds, or rodents.

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What proportion of food products sold on U.S. supermarket shelves contains some form of genetically engineered crop?

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Since 1942 the use of synthetic pesticides has increased 10-fold. In spite of this fact, food supply damage due to pests has increased during that time.

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It takes about one unit of nonrenewable fossil fuel energy to put one unit of food energy on the table.

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A disadvantage to the green revolution is the intensive use of commercial inorganic fertilizers.

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Explain the benefits of using perennial plants rather than annual plants for food crops.

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The world's 30,000 known species of spiders

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Which of the following is a micronutrient, which without sufficient quantities in a diet can result in goiter?

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Which of the following terms does not belong with the others?

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Strains of genetically modified food crops can hybridize with wild crop varieties when

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The United States primarily uses ____________________ for food production.

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