Publication Date: October 2011 | Publication Number: az1410-2011 |
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Leaf analysis is an excellent tool for evaluating the current nutritional status of pecan trees and for diagnosing nutrient disorders. When conducted over multiple years, changes in tree nutrition can be tracked, effectiveness of fertilizer management programs measured, and fertilization strategies modified. For leaf analysis to be a useful tool, several basic steps should be followed. Leaf samples must be properly collected. Leaf composition can vary depending on pecan variety, soil conditions, fruit load, and even position of the sampled leaflet AZ1410within the leaf and on the tree. Leaf composition changes monthly and seasonally, so the timing of sample collection is important. Leaf samples should be properly handled after they are collected and sent to a laboratory for analysis. The analysis will determine nutrient levels in the leaf tissue, which is an indication of how well the tree has been supplied with nutrients. To make the analysis data meaningful, standard values are used to interpret leaf analysis results and to evaluate pecan tree nutritional status.
Revised 10/2011. Originally published: 2006.