character: Dr. Emily Carter
topic: The role of a Soil Scientist in agriculture and environmental preservation
grade: 9
subject: Science
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character: Mr. David Smith
topic: Understanding soil composition: minerals, organic matter, water, and air
grade: 9
subject: Science
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character: Professor Angela Brown
topic: Factors affecting soil fertility and its implications for crop production
grade: 9
subject: Science
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character: Dr. John Lee
topic: The impact of soil erosion on soil health and fertility
grade: 9
subject: Science
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