character: The Nitrogen Cycle
topic: Understanding the biological and chemical processes involved in the nitrogen cycle and its importance in ecosystems.
grade: 9
subject: Chemistry
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character: Earthworms
topic: Role of earthworms in enhancing soil fertility through organic matter decomposition and nutrient cycling.
grade: 9
subject: Chemistry
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character: Soil Fertility
topic: Factors affecting soil fertility and the contribution of different organisms, including earthworms, to maintaining healthy soil.
grade: 9
subject: Chemistry
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character: Nitrogen Fixation
topic: The process of nitrogen fixation and its significance in agriculture and soil health.
grade: 9
subject: Chemistry
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