character: Professor John Smith
topic: Soil Erosion and Agricultural Productivity
grade: 9
subject: Geography
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character: Dr. Emily Carter
topic: Impact of Soil Quality on Crop Yields
grade: 9
subject: Geography
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character: Ms. Laura Chen
topic: Techniques for Preventing Soil Erosion
grade: 9
subject: Geography
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character: Mr. Daniel Thompson
topic: Sustainable Farming Practices for Soil Conservation
grade: 9
subject: Geography
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