Tree and vine crops can be won or lost because of one or two critical degrees of cold temperature, so, ultimately, the best method of frost protection is good site selection. But even the best sites won’t be perfectly freeze-free. Is there a good way to recover those one or two degrees lost on a cold night? Research agricultural engineer Dr. Robert Evans, who recently retired from the USDA’s Agricultural Research Service’s Northern Plains Laboratory in Sidney, Montana, spent his career studying ways to do that. Before his work at USDA, he spent more than 20 years doing frost protection […]
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