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Reset/replant problems and/or failure are recognized as a problem in fruit tree production throughout the world. Problems in establishing or reestablishing fruit trees have been documented in apple, peach, grape, and citrus. Research to date has not identified a single casual agent responsible for reset failure, but rather there is evidence that such problems are related to a complex interaction of biotic and abiotic factors. In this study, we compared abiotic factors related to soil texture and soil nutrients in healthy and reset failure areas of a commercial citrus grove in Florida. A significant difference in soil texture was found in healthy sand, silt, and clay (94%, 4%, and 2%, respectively) vs. failed (99% sand and &lt;1% silt and clay) reset areas in the citrus grove block. Mehlich III extractions were performed on soil samples and levels of Ca, Cu, Fe, K, Mg, Mn, P, and Zn in the extract solution were significantly higher in healthy compared to failed reset areas of the citrus grove block. These data are consistent with what has been observed in other fruit crops where soil texture, which directly relates to soil hydrologic conditions, and soil nutrient levels have been identified as contributing factors related reset/replant failure in fruit tree crops.

(89) Abiotic Factors Possibly Contributing to Reset Failure of Citrus Trees in a Commercial Grove in Florida