. Cranberries; : the national cranberry magazine. Cranberries. The Massachusetts Cranberry Crop Potential For 1978 by John S. Norton The cranberry crop forecast, based on weather conditions from June 15 through July 20 (the bloom period) was for 1,066,000 bbls. to be produced in 1978. This value results from use of the formula devised by the author and first used to predict the 1973 crop. The derivation of the formula was described in detail in the August and September 1973 issues of Cranberries. A review of the 1973 forecast was presented on page 13 of the February 1974 issue of Cranberries.
. Cranberries; : the national cranberry magazine. Cranberries. The Massachusetts Cranberry Crop Potential For 1978 by John S. Norton The cranberry crop forecast, based on weather conditions from June 15 through July 20 (the bloom period) was for 1,066,000 bbls. to be produced in 1978. This value results from use of the formula devised by the author and first used to predict the 1973 crop. The derivation of the formula was described in detail in the August and September 1973 issues of Cranberries. A review of the 1973 forecast was presented on page 13 of the February 1974 issue of Cranberries. Figure 1 is the graph from which the potential crop was determined. This is not the same graph used in the forecasts issued in 1973 through 1977. That graph was established by crops preceding the extensive practice of water-harvest. Consequently in making the fore- cast an upward adjustment was made in those years to compensate for the increased yields on water- harvested bogs. The new graph is based on the crops since 1969 and therefore includes the effect of water-harvest. In effect, sunshine and daytime temperatures and precipitation dur- ing the bloom period are boiled down to a value which I call "; This value, 33 penalty-points, is located along the base line of the graph. A vertical line is drawn from the base hne to the curve. From the intersection of the vertical line and the curve, a horizontal line is drawn to the left hand margin labeled "Potential Crop," in the present case, using 33 penalty points it is 1,000,000 bbls. This is the crop that would be expected if there were no unusual losses to frost, flood, scald, etc. and if the spring frost season had the typical number of nights with "borderline" temperatures. How- ever, the frost season was not quite typical. Until the nights of June 14, 15 and 16, it was as mild as the spring seasons of 1960, '71, '73 and '75. Therefore, I am predicting that the effect of the mild s
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