ABSTRACT
Eight commercial lowbush blueberry (Vaccinium angustifolium Ait.) fields were fertilized with diammonium phosphate (DAP) at 0, 224 or 448 kg ha−1 (0, 200, and 400 lbs per A) to determine the effect on subsequent leaf nutrient concentration. A RCB design with four replications was used. Leaf samples taken in July 1991 showed an increased concentration of phosphorus with increasing rate of DAP, but leaf nitrogen level was unaffected. Soil samples taken at the same time showed no significant increase in available phosphorus. Stems collected after leaf drop were taller and more branched with a larger number of flower buds due to application of DAP compared to the controls. There was a linear increase in yield with increasing rate of DAP. [Article copies available from The Haworth Document Delivery Service: 1-800-342-9678.]
