Wisconsin State Cranberry Growers Association / Wisconsin State Cranberry Growers' Association. Thirty-fifth annual meeting, Wisconsin Rapids, Wisconsin, January 10, 1922. Thirty-fourth summer meeting, pavilion, near Nekoosa, Wisconsin, August 9, 1921
Malde, O. G.
Local forecasting of his own cranberry bog very important for the Wisconsin cranberry grower, pp. 25-29 PDF (1.1 MB)
WISCONSIN CRANBERRY GROWERS' ASSOCIATION LOCAL FORECASTING OF HIS OWN CRANBERRY BOG VERY IMPORTANT FOR THE WISCONSIN CRANBERRY GROWER By 0. G. MAI.In.. Tomah, Wis. The forecasts of the 1. S. Weather Bureau together with their daily weather maps are practically indispensable to the cranberry growers and this is especially true of the Wisconsin groweis. There are certain local conditions, however, that often develop un- expectedly in the Wisconsin cranberry regions and which cannot be foretold by the Weather Bureau in their morning forecasts, nor even in their special afternoon forecasts, because these conditions develop late in the afternoon or early in the evening. The Wisconsin growers, therefore, need to be especially vigilant on account of these possible, sudden, unforeseen, local changes and should accustom themselves to making forecasts for their own individual locations. From data gathered over a period of several years at the Cranberry Experiment Station at Cranmoor, I have devised a simple method of forecasting minimum temperatures, that I believe can be safely fol- lowed by any Wisconsin grower who will provide himself with the few necessary instruments, and familiarize himself with the local conditions that must be considered in making predictions. After several years of comparison between the evening dew point and the minimum temperature of the night following on unsanded bogs, It was found, that under normal conditions the average range or difference was about 17 degrees. By normal conditions is meant a normal barometer and a normal direction and velocity of wind for the locality. Seventeen degrees was therefore adopted as a constant or basis from which to figure the minimum temperature. For each tenth of an inch that the barometer is above normal, three degrees should be added to the constant, and vice versa. For each four degrees that the daily maximum thermometer registers be- low 75 degrees, on a clear day, with a westerly, northerly or northeast wind prevailing, and with a stationary or slowly rising barometer, add one degree to the constant. Other local conlitions that should be considered, but which require local experience to be admitted in the calculations are; condition of the sky, regularity or irregularity of the wind, presence of fog, and peculiarities of it, presence of a bright Aurora in the northern skies, . inactivity of insects and frogs. To forecast satisfactorily a grower should possess: 1. Maximum Registering Thermometer exposed in a standard shelter. 2. One minimum registering thermometer exposed in a stan- dard shelter. 3. One minimum registering thermometer at the coldest place known in the cranberry bog or adjoining it on the wild marsh. 4. One barometer (registering barograph is best) which may be kept in the house or on the porch. 25
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