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  • Author or Editor: J. W. Buxton x
  • Journal of the American Society for Horticultural Science x
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Abstract

An analysis of using an air-earth heat exchange for controlling the environment in a greenhouse was conducted. For purpose of the analysis, a small greenhouse (2.75 m wide and 4.25 m long) connected to 30.5 m of 45 cm diameter pipe was assumed. In terms of heating, the air-earth heat exchanges proved to be inadequate except for the very southern parts of the United States, and even in these locations the temperature had to be limited to a relatively cool temperature of 10°C. A similar analysis for summer showed that the air-earth heat exchange could effectively limit the occurrence of high temperatures in a greenhouse throughout the United States.

Open Access

Abstract

The environment created by ventilating a greenhouse with mine-air was suitable for the production of high quality spray chrysanthemums (Chrysanthemum morifolium Ramat.) and snapdragons (Antirrhinum majus L.) from mid-February through November without any additional energy requirement. The environment created in the greenhouse from December to February was extremely humid and favored botrytis development and physiological problems which reduced crop quality.

Open Access