Productivity comparison of 37-year-old loblolly-shortleaf pine seed sources in southern Illinois (1988)Rink, G., & Wells, O. O. (1988). Productivity comparison of 37-year-old loblolly-shortleaf pine seed sources in southern Illinois. Northern Journal of Applied Forestry, 5(2), 155-158. Retrieved from http://www.ingentaconnect.com/content/saf/njaf/1988/00000005/00000002/art00026 In a 37-year-old southern Illinois species comparison/provenance test shortleaf pine produced greater volumes of wood than loblolly pine, both per acre and per/acre/year. Although surviving loblolly pine were taller, shortleaf pine had greater per/acre volume primarily due to a two-fold greater survival than that for loblolly pine. Only 14% of the loblolly pine were present at age 37, partially reflecting a biased representation with southern seed sources. For shortleaf pine, trees of southwest Missouri had the highest survival and the greatest production per acre http://www.ingentaconnect.com/content/saf/njaf/1988/00000005/00000002/art00026
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