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Description: The use of sprinkler irrigation equipment to cool the aerial environment of crops is a recent innovation in agricultural production. The benefits to be gained include increased yield and quality of the crop and the extension through climatic modification of the normal geographic limits of specific crop production. Plant water potential is influenced more by evaporative demand of the atmosphere than by soil water availability, particularly when soil water is maintained within the tensiometer range (1, 4, 9). The significance of changes in plant water potential is not well defined (1) but there is evidence (7) that the changes can be controlled by mist irrigation with resultant beneficial yield response. Plant growth is restricted by water deficits caused by excessive transpiration during the heat of midday (10). Simultaneous plant and air temperatures may differ widely and plants may respond to air temperature changes of only a few degrees Celsius (13). A change of a few degrees in leaf temperature can make a major difference in the biological functions of plants (6). Beans, peas, potatoes, tomatoes, straw berries, and tree fruits are among the crops reported to have critical maximum temperatures from which they can be profitably protected (5, 7, 9, 11, 15). Little has been recorded about critical temperatures but 90

Keywords: crop cooling with sprinklers
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Citation: Hobbs, E.H. 1973. CROP COOLING WITH SPRINKLERS. Canadian Agricultural Engineering 15(1):6-8.
Volume: 15
Issue: 1
Pages 6 - 8
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Date: 1973
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Coverage: Canada
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