Publisher's Synopsis
Excerpt from Protection of Orchards Against Frost
Orchard heating is used for producing a rather small modification of outdoor temperature, namely, counteracting local cooling to maintain a safe minimum temperature, and raising the temperature of inflowing air near the ground a maximum of about 10° Fahrenheit. Whether orchard heating should be used more extensively than at present is primarily an economic problem. In general, heating should be avoided if there is any doubt as to its being worthwhile. It seems likely that present heating equipment will still be in use when fuels will have changed somewhat in quality and when they will probably be higher in cost.
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