Exam 14: Food and Soil Resources

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What percentage of Canada's gross national product (GNP)does agriculture contribute? 

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Which practice both reduces erosion and  prevents the spread of pests and plant diseases? 

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When is a person considered undernourished? 

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What is the agent of most soil erosion? 

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What is one reason that China has lost much cropland since about 1960? 

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Which type of agriculture involves supplementing solar energy with human labour and draft animals? 

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Which term best applies to a farm where alternating rows of hemp and maple trees have been planted? 

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Which statement best describes salinization? 

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Farmers use alley cropping-in which crops are planted in rows around hills rather than up and down the hills-to minimize soil erosion.

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How are living organisms affected by agriculture? 

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What would be increased through the use of perennial crops? 

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People worldwide are unable to purchase or to raise enough food to meet their nutritional needs.

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What is the main reason for the increase in global food production since 1950? 

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