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Visit a green house if there is one near your place. Observe how they grow plants. Find out how they regulate the amount of light, water and carbon dioxide to grow the plants.

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Question

Visit a green house if there is one near your place. Observe how they grow plants. Find out how they regulate the amount of light, water and carbon dioxide to grow the plants.

Answer in Brief
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Solution

  1. Light Regulation:

    • Use of Shading Nets: To control the amount of sunlight entering the greenhouse.
    • Artificial Lighting: Additional lights may be used to ensure plants receive adequate light during low natural light conditions.
  2. Water Regulation:

    • Drip Irrigation Systems: Efficiently delivers water directly to the plant roots.
    • Sprinkler Systems: Evenly distributes water over the plants.
    • Humidity Control: Humidifiers or misters may be used to maintain the desired humidity levels.
  3. Carbon Dioxide Regulation:

    • Ventilation Systems: Ensures proper air circulation and CO2 levels.
    • CO2 Enrichment: Some greenhouses use CO2 generators to increase the carbon dioxide concentration to enhance plant growth.
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Chapter 1: Nutrition in Plants - Activities and Projects [Page 10]

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NCERT Science [English] Class 7
Chapter 1 Nutrition in Plants
Activities and Projects | Q 2. | Page 10

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