Schumann, Arnold W., and Edward A. Hanlon. 2020. “Nutrition of Florida Citrus Trees, 3rd Edition: Chapter 5. Precision Agriculture for Citrus Nutrient Management: SL459 SS672, 2 2020”. EDIS 2020 (2). Gainesville, FL. https://doi.org/10.32473/edis-ss672-2020.