character: Professor Sandy
topic: Impact of Soil Erosion on Agriculture
grade: 9
subject: Geography
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character: Professor Sandy
topic: Soil Conservation Techniques
grade: 9
subject: Geography
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character: Professor Sandy
topic: Effects of Erosion on Crop Yield
grade: 9
subject: Geography
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character: Professor Sandy
topic: Climate Change and Soil Erosion
grade: 9
subject: Geography
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