Precommercial thinning x fertilization study data from the Penobscot Experimental Forest

This data publication contains the data from the precommercial thinning by fertilization study initiated in 1976 and collected under the study plan: 4100-FS-NE-1101-58 "Study Plan: Cultural treatments designed to reduce spruce sawlog rotation age - an early release and fertilization study" (see Methodology citation section). Fertilizer treatments were non- fertilized and fertilized with granulated lime stone. Precommercial thinning treatments were no-release, spaced, row thinning with crop tree release, and row thinning with no crop tree release. Data include treatment information as well as tree species, diameter at breast height, height, height to crown base, and crown width measured periodically since 1976. Data are currently available through 2008.The primary objective of this study was to quantify crop tree response to treatment.* This metadata applies to the raw data available through the full data publication download. Summary data available through the online query are calculated based on user selections and should be carefully interpreted. Original metadata was created on 09/27/2012. Minor metadata updates made on 11/18/2014. Minor metadata updates on 12/09/2016.