Environmental Control for Greenhouse Tomatoes
The only reason for growing plants in a greenhouse rather than outside is to be able to control the environment. A greenhouse allows the grower to produce plants in a location where they would normally not grow and at a time of year when it would otherwise be impossible because of the weather.
A greenhouse protects plants from extreme temperatures, rain, sleet, snow, winds, hail, insects, and diseases, etc. In addition, heat can be added, ventilation can be provided, air can be cooled, humidity can be controlled, carbon dioxide can be added, light level can be altered, and water and fertilizer can be provided at optimum levels.
The purpose of altering the environment is to provide a constantly controlled environment where plants can be grown at their optimum, not just to avoid extremes in the weather. In summary, the function of a greenhouse is to modify the environment for better plant production.
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