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Non-uniform tree growth and fruit yield are very common throughout many Florida citrus groves, but variable groves are typically managed as if they were uniform. This 4-page fact sheet provides information about the relationship between soil variability and citrus production, proposes recommendations for soil sampling that account for spatial variability, and suggests site-specific management practices for variable Florida citrus groves. Written by Kirandeep K. Mann, Arnold W. Schumann, Thomas A. Obreza, Willie G. Harris, and Jerry B. Sartain, and published by the UF Department of Soil and Water Science, January 2012.
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Ehsani, R., A. Schumann, and M. Salyani. 2009. Variable Rate Technology for Florida Citrus. AE444. Gainesville: University of Florida Institute of Food and Agricultural Sciences. http://edis.ifas.ufl.edu/ae444. https://doi.org/10.32473/edis-ae444-2009
Mann, K.K., A.W. Schumann, and T. A. Obreza. 2011a. "Delineating Productivity Zones in a Citrus Grove Using Citrus Production, Tree Growth and Temporally Stable Soil Data." Precision Agriculture 12 (4):457-72. doi:10.1007/s11119-010-9189-y. https://doi.org/10.1007/s11119-010-9189-y
Mann, K.K., A.W. Schumann, T.A. Obreza, M. Teplitski, W.G. Harris, and J.B. Sartain. 2011b. "Spatial Variability of Soil Chemical and Biological Properties in Florida Citrus Production." Soil Science Society of America Journal 75. doi:10.2136/SSSAJ2010.0358. https://doi.org/10.2136/sssaj2010.0358
Obreza, T.A., M. Zekri, and E.W. Hanlon. 2008. "Soil and Leaf Tissue Testing." SL253. In Nutrition of Florida Citrus Trees, 2nd edition, edited by T.A. Obreza and K.L. Morgan, 24-32. Gainesville: University of Florida Institute of Food and Agricultural Sciences. http://edis.ifas.ufl.edu/ss478. https://doi.org/10.32473/edis-ss478-2008
Zaman, Q., and A.W. Schumann. 2006. "Nutrient Management Zones for Citrus Based on Variation in Soil Properties and Tree Performance." Precision Agriculture 7: 45-63. https://doi.org/10.1007/s11119-005-6789-z