. Cranberries; : the national cranberry magazine. Cranberries. the sprinklers. One night the tem- perature was below that which I considered was the tolerance on this particular bog. The other two nights the temperature was at the danger point. The vines suffered no damage and the crop was good. However, the length of time that the vines endured the low temper- atures was of short duration. From heresay and observations, there seems to have been a marked tendency among many growers to start the sprinklers a little late in the past. Experiments to date have not shewn any benefit from pro- tecti
. Cranberries; : the national cranberry magazine. Cranberries. the sprinklers. One night the tem- perature was below that which I considered was the tolerance on this particular bog. The other two nights the temperature was at the danger point. The vines suffered no damage and the crop was good. However, the length of time that the vines endured the low temper- atures was of short duration. From heresay and observations, there seems to have been a marked tendency among many growers to start the sprinklers a little late in the past. Experiments to date have not shewn any benefit from pro- tecting for 32°, either by sprinkler or flooding, in the spring frost season under normal conditions. I believe this to be a practice that some growers indulge in; namely, that they use the temper- ature readings of a thermometer on the side of their house as a measure of the temperature on their bogs. This should not be relie^d on to the extent that it determines whether or not you get to your bogs on nights in the frost season. Whatever the tem- perature difference between such a location and that on a bog might be, over a long period of time, there is a certainty that under the right conditions a variation will occur and chances are you will be late with frost protection. Upon removing the "late water" flood, the buds will be at the same tolerance as those of early water. Fresh sand on a bog should be good for +2°, especially if moist. There have been many cases where bogs have been frosted in the spring up-towards to 20% and still borne a respectable crop. If a grower feels he must gamble with frosts for one reason or another, it seems best to do so in the first part of the spring frost season. The buds are then in various stages of tolerance and many will come through a rather severe frost. The terms ''Balance against," "Balance for," "Balance even," are always incorporated in a frost warning. If the balance is against, it means that the dew
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