Mineral Nutrition
Telangana Open School (TOSS) · Class 12 · Biology
Complete topic list for Mineral Nutrition in Telangana Open School (TOSS) Class 12 Biology. Key concepts, sub-topics, and what to focus on for board exams.
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Topics in Mineral Nutrition
Essential Elements and Their Criteria
- Plants require 17 essential elements for normal growth and reproduction.
- Essential elements must satisfy three criteria: they are necessary for growth, irreplaceable, and directly involved in plant nutrition.
- Elements are classified as macronutrients (needed in large amounts) and micronutrients (needed in small amounts).
Macronutrients and Micronutrients
- Macronutrients: C, H, O, N, P, K, Ca, Mg, S — required in large quantities.
- Micronutrients: Fe, Mn, B, Zn, Cu, Mo, Cl — required in trace amounts.
- C, H, O are obtained from air and water; others mainly from soil.
Hydroponics and Aeroponics
- Hydroponics is growing plants in nutrient-rich water without soil.
- Aeroponics involves growing plants in air with roots misted by nutrient solution.
- Both methods allow precise control over mineral supply and are used in research and modern farming.
Key Concepts
Central concept: Mineral Nutrition
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