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Needle Sampling Dates for Nutrient Evaluation in Christmas Tree Production

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https://ir.library.oregonstate.edu/concern/articles/bk128b719

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Abstract
  • Christmas tree needle sampling to evaluate nutrient need is an established practice. Data to support the recommended fall sampling time in Oregon and Washington was not found. In addition, the recommendation for needle sampling of Fraser fir in North Carolina was made without data from winter months. The goal for this paper is to affirm or modify recommended needle sampling time. Needles of Douglas-fir, Turkish fir, Nordmann fir, Noble fir, Grand fir, and Fraser fir Christmas trees were collected monthly for a year, dried, and analyzed for N, P, K, Ca, Mg, and B. No single period was found for any species when needle nutrient concentration was stable for all elements investigated. Revised recommended needle collection times were chosen by integrating cultural practices, likelihood of nutrient deficiency, and needle nutrient concentration changes for species grown in an area. Needle collection is recommended during February in western Oregon and Washington. The current sampling time, fall, is logical for Fraser fir Christmas tree production in North Carolina.
  • Keywords: Noble fir (Abies procera), Nordmann fir (Abies nordmanniana), Grand fir (Abies grandis), Tissue sampling, Fraser fir (Abies fraseri), Christmas trees, Annual nutrient concentration, Turkish fir (Abies bornmuelleriana), needle sampling, Douglas-fir (Pseudotsuga menziesii)
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  • Hart, J., Landgren, C., Moody, J., Fletcher, R., & Horneck, D. (2012). Needle collection time for nutrient evaluation in christmas tree production. COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS, 43(1-2), 471-477. doi: 10.1080/00103624.2012.641842
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  • 43
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  • 43467
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