[Market-farming] hard freeze
wshoemak at inil.com
Wed Apr 4 09:13:39 EDT 2007
The technique is to turn on the sprinklers just before freezing conditions
occur, leaving them running until any ice that forms melts the following
morning. As the water freezes, it releases heat. That keeps the plant tissue
from freezing. But if the sprinklers are turned off and there is no more
free water to turn into ice, there is no more heat released and the ice
begins to freeze the plant tissue. That's why the sprinklers need to
continue to run until all the ice melts off the plants.
It can be a monumental task, and expensive. A grower needs to evaluate
whether it's more cost-effective to replant or just lose the crop.
Bill Shoemaker, Sr Research Specialist, Food Crops
University of Illinois - St Charles Horticulture Research Center
> >An old trick in orchards is to turn the sprinklers on.
> So does this mean to leave the sprinklers on all night or to just wet
> the plants before the temperature drops? -Allan
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