Greenhouse

A structure with transparent walls and a roof that admits sunlight and reduces heat loss, creating a warmer, controllable environment for growing plants.

Greenhouse effect: The warming that occurs when incoming solar energy is retained more effectively than outgoing heat. Solar energy enters through glazing, while reduced heat loss helps warm the enclosed space.
Hoop house: A low-cost growing structure formed by curved supports covered with plastic film. It is a simple greenhouse design built around a curved frame and flexible covering.
Protected agriculture: Crop production under structures or coverings that modify growing conditions and protect plants. Greenhouses are one major form of this broader approach to cultivation.
Shade house: A structure covered with shade cloth that reduces sunlight and heat while allowing substantial airflow. It protects crops from excessive sun without enclosing them as tightly as a greenhouse.
Season extension: The use of structures or techniques to grow crops beyond their usual outdoor season. Greenhouses allow planting and harvesting when outdoor temperatures would limit growth.
Thermal radiation: Energy transferred by electromagnetic waves emitted by matter because of its temperature. Radiative heat exchange helps determine how quickly a greenhouse loses warmth.
Cold frame: A low, unheated enclosure with a transparent lid used to protect plants and extend growing seasons. It applies greenhouse principles at a smaller scale, usually without a full-height structure.
Hydroponics: Growing plants with nutrient-rich water rather than soil as the primary root medium. Greenhouses often pair environmental control with soilless crop production.
Polytunnel: A tunnel-shaped crop shelter covered with polyethylene film, often used for season extension. It is a close alternative to a greenhouse, usually simpler and less rigidly controlled.
Integrated pest management: A strategy that combines monitoring and multiple control methods to manage pests while limiting harm. Enclosed crops need pest control that accounts for rapid outbreaks and limited natural predators.

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