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Main and interactive effects of cropping-year applications of nitrogen, phosphorous, and potassium fertilizers on the yield components of the lowbush blueberry


, : Main and interactive effects of cropping-year applications of nitrogen, phosphorous, and potassium fertilizers on the yield components of the lowbush blueberry. Hortscience 36(3): 594, June

The main and interactive effects of nitrogen, phosphorous, and potassium fertilizer applications during the cropping phase of production of lowbush blueberries (Vaccinium angustifolium Ait) was examined at a commercial field in Millvale, Nova Scotia in 2000. A rotatable composite experimental design with four replications and sixteen treatments was used with varying levels of nitrogen (0 to 30 kgcntdotha-1 of actual N/ha in the form of urea), phosphorous (0 to 150 kgcntdotha-1 of actual P2O5/ha in the form of triple superphosphate), and potassium (0 to 60 kgcntdotha-1 of actual K2O in the form of murate of potash). Plots were arranged in a randomized complete-block design with a plot size of 6 X 8 m. A significant effect of the nitrogen and potassium fertilizers on berry number per stem was present, and harvestable yield (gcntdotm2) was increased with the presence of both phosphorous and potassium fertilizers. Therefore, the results from this experiment indicates that yield increases can occur as a result of using cropping-year fertilizer applications, and fertilizers containing a combination of nitrogen, phosphorous, and potassium should be used to maximize yield potential.

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