1 A) 1910-1930. B) 1930-1950. C) 1945-1965. D) 1950-1970. 2 A) nitrogen, phosphorus and sodium. B) carbon, nitrogen and sodium. C) nitrogen, phosphorus and potassium. D) carbon and nitrogen. 3 A) less persistent in the environment. B) more species specific. C) less toxic to humans. D) more persistent in the environment. 4 A) True B) False 5 A) cannot use genetically modified organisms, chemical fertilizers or synthetic pesticides. B) cannot use genetically modified organisms or chemical fertilizer, but can use synthetic pesticides. C) cannot use genetically modified organisms or synthetic pesticides, but can use chemical fertilizers. D) cannot use genetically modified organisms, but can use chemical fertilizers. 6 A) True B) False 7 A) harvesting is more efficient. B) planting is more efficient. C) cultivation is more efficient. D) All of the above are correct. 8 A) developing countries have decreased use of chemical pesticides. B) developing countries have increased use of chemical pesticides. C) developing countries have continued use of organic fertilizers. D) None of the above are correct. 9 A) conservation B) development C) control D) monoculture 10 A) True B) False 11 A) True B) False 12 A) True B) False
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