“Super” Spruce Seedlings Continue Superior Growth for 18 Years
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- Nienstaedt, Hans
North Central Forest Experiment Station, Forest Service-U.S. Department of Agriculture
White spruce seedlings-20,19,18 and 17 inches tall-were selected among 2-2 transplants; controls from the same beds averaged 7.7 inches tall. After 18 years in the field, the selected seedlings continued to have a 30 percent height growth advantage over the controls. This note discusses how to incorporate super spruce seedlings into a tree breeding program.
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