Abstract
Wholesale values, retail values of five eastern United States lots, U.S. Dept. of Agriculture (USDA) Christmas-tree grades, and measurements of various growth and quality traits were obtained on ≥1400 Fraser fir [Abies fraseri (Pursh) Poir.] (8 years old) Christmas trees. Retail lot values were similar, but average retail value correlated poorly with wholesale value within merchandising height classes. For each of the current wholesale categories (defined by the combination of 30.5-cm interval height classes and USDA grades), average values ranged widely. Some cull-grade trees, which would be unmerchantable according to USDA standards, had moderate retail value. Also, the retail mean of any one wholesale category generally was not significantly different from that of adjacent categories. Some tree quality defects that have equal impact on USDA grade, and consequently wholesale value, differed widely in their effect on retail values. This study indicates that current USDA Christmas-tree grade standards do not adequately differentiate Fraser fir trees with respect to their retail value. We propose a new method of Christmas-tree quality certification that involves computed Christmas-tree quality index values that offer greater accuracy in describing quality with respect to retail value.
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