FROST DAMAGE
METHOD OF CONTROL USE OF PROPELLER (P.A.J HASTINGS, Dee. 30. A method of controlling frost damage which gives promise of success was mentioned by Dr E. Marsden, secretary of the Department of Scientific and Industrial Research, in an interview to-day. It depended, he said, on normal occurrence temperature inversion in frosting conditions. The air above the trees on a normal frosty night -was warmer than the air at the surface, Dr Marsden said. A large propeller, somewhat similar to that of a helicopter, was used to suck this warm air from above and spread it over the surface, displacing the cold air by suction from above. About three kilowatts of power was involved, and the area treated was about five acres. This method had met with some success in Australia. Dr Marsden added that, in conjunction with the horticultural division of the Department of Agriculture, it was hoped to try the method in New Zealand.
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https://paperspast.natlib.govt.nz/newspapers/ODT19461231.2.30.3
Bibliographic details
Otago Daily Times, Issue 26348, 31 December 1946, Page 4
Word Count
157FROST DAMAGE Otago Daily Times, Issue 26348, 31 December 1946, Page 4
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