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NITRATES AND PRUSSIC ACID In spite of the fact that my thermometer next to the house only read 37 degrees, I had several farmers tell me that in early October, there was a light frost. It wasn’t a killing frost, as everything is still green at my place. But, it did burn the tips of some vegetation out in the countryside. Anyway, ever since that chilly morning, I have had a number of phone calls ...
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