Leaf nutrient levels for pecans

Andrew P. Pond, James L. Walworth, Michael W. Kilby, Richard D. Gibson, Robert E. Call, Humberto Núñez

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


Measurement of nutrients in leaf tissue is a practical method of monitoring the nutritional status of perennial crops such as pecan (Carya illinoinensis, Wang. C. Koch). Accurate interpretations require known standard concentrations for the crop and region. To determine standard concentrations for pecans, focusing on those grown in the desert southwest, we conducted a survey of 135 'Western Schley' pecan trees in Arizona for 2 years. Leaf nutrient concentrations and yield were collected for each tree. Leaf nutrient concentrations from the highest yielding trees (50th yield percentile) were used to calculate a mean and CV for each nutrient. Results were compared with data from New Mexico, Georgia, and Sonora, Mexico. Relatively large differences were noted in mean K, Ca, B, Cu, Fe, Mn, and Zn levels. Nutrient interpretation ranges were calculated based on Arizona population statistics using the balance index method.

Original languageEnglish (US)
Pages (from-to)1339-1341
Number of pages3
Issue number5
StatePublished - Aug 2006


  • 'Western schley'
  • Balance index
  • Carya illinoensis
  • Foliar analysis
  • Leaf analysis
  • Leaf sampling

ASJC Scopus subject areas

  • Horticulture


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