| 摘要 |
PROBLEM TO BE SOLVED: To provide an air blowing method intended for solving such problems that a conventional air blowing method intended for frost protection is usually a method using an air blowing fan set on a pillar, but a new frost protection method composed of a cylindrical casing and a fan is in a condition of being expected in a market, intended for further expansion of frost protection effect, and is in principle an extension of a conventional method, so further improvement is desired. SOLUTION: This air blowing method for preventing heat radiation of geothermal heat has essential requirements of blowing air through an air blowing fan in a field, and blowing air to the almost whole of the filed. The air blowing method comprises securing covering with air curtain, and performing air blowing to a constant direction always and/or directly, and air blowing to eliminate heat radiation of geothermal heat in the field through performing at least air blowing in a direction of current of air, covering the almost whole of the field and wrapping the whole of crops in the filed. COPYRIGHT: (C)2007,JPO&INPIT
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