. Cranberries; : the national cranberry magazine. Cranberries. FOLIAR NUTRIENT. .. (continued from page 4) THE SOIL TEST DATA for available phosphorous and potassium in the 3 plot areas are presented in Table 1. Soil phosphorous levels were low in area B during the first season but this situation was corrected with a fertihzer appHcation in the spring of the second season. Potassium levels ranged from a low of 67 Kg/ha to a high of 179 Kg/ha. Area B maintained levels below the arbitrarily chosen standard of 112 Kg/ha available K. The differences among the three repUcate samples within a plot a
. Cranberries; : the national cranberry magazine. Cranberries. FOLIAR NUTRIENT. .. (continued from page 4) THE SOIL TEST DATA for available phosphorous and potassium in the 3 plot areas are presented in Table 1. Soil phosphorous levels were low in area B during the first season but this situation was corrected with a fertihzer appHcation in the spring of the second season. Potassium levels ranged from a low of 67 Kg/ha to a high of 179 Kg/ha. Area B maintained levels below the arbitrarily chosen standard of 112 Kg/ha available K. The differences among the three repUcate samples within a plot area for some dates is of interest, , Area A, July 26 and Area C, October 31 for phosphorous. There was a 100 percent difference in available P within a distance of 50 feet at those locations. The summary of the analyses for mineral element concentration in the various tissues is presented in Table 2. Differences among dates for tissues and elements were consistent for all three locations and replicates within locations. Therefore, the data are presented as means of nine samples DIRECTORY for Cranberry for each element, date and tissue. Missing data for old leaves on 10/31 in one year and 7/26 and 8/28 the second year reflect the absence of leaves due to normal leaf drop. Phosphorous tended to decline seasonally in all tissues with the sharpest changes being evident in the new stem tissue. The minimum levels found in new leaves (.14 per- cent) were at the level of sufficiency estabUshed in earlier laboratory, green- house and field studies. The greatest changes in potassium (K) concentrations were found in the new stem tissue with less changes in j new leaves. It has long been known that petioles are often the tissue in j crops that show the largest changes in potassium concentration seasonally and in response to soil supply. The cranberry is nearly devoid of petioles. Apparently the stem axis in cranberry serves in the same general way as the petiole of grapes and other com
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