Obreza, Thomas A., Mongi Zekri, and Stephen H. Futch. 2020. “Nutrition of Florida Citrus Trees, 3rd Edition: Chapter 3. General Soil Fertility and Citrus Tree Nutrition: SL457 SS670, 2 2020”. EDIS 2020 (2). Gainesville, FL. https://doi.org/10.32473/edis-ss670-2020.