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Bulletin #2097, Boom Sprayer Calibration (PDF for printing) By Lily Calderwood, PhD., Wild Blueberry Specialist and Associate Professor of Horticulture, University of Maine Cooperative Extension and Jordan Parks, Wild Blueberry Research Technician, University of Maine Cooperative Extension. For information about UMaine Extension programs and resources, visit extension.umaine.edu.Find more of our publications and books at extension.umaine.edu/publications/. […]https://extension.umaine.edu/publications/wp-content/uploads/sites/52/2025/04/Image1_web.jpg450730