character: Dr. Green
topic: Hydroponic Systems in Agriculture
grade: 9
subject: Biology
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character: Sue Smith
topic: Nutrient Solutions in Hydroponics
grade: 9
subject: Biology
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character: Tom Bright
topic: Plant Growth Factors in Soil-less Cultivation
grade: 9
subject: Biology
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character: Anna Fields
topic: Benefits of Hydroponic Farming
grade: 9
subject: Biology
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