Long-term effect of density management on growth and yield of true fir (Abies concolor and Abies magnifica) stands in northern California

Principal Investigator(s):  View help for Principal Investigator(s) US Department of Agriculture; US Forest Service

Version:  View help for Version V1

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RDS-2025-0053.zip application/zip 5.7 MB 05/30/2026 11:39:AM
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Project Citation: 

US Department of Agriculture, and US Forest Service. Long-term effect of density management on growth and yield of true fir (Abies concolor and Abies magnifica) stands in northern California. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2026-05-31. https://doi.org/10.3886/E248734V1

Project Description

Project Title:  View help for Project Title Long-term effect of density management on growth and yield of true fir (Abies concolor and Abies magnifica) stands in northern California
Summary:  View help for Summary This data publication includes data from several long-term true fir (white fir (Abies concolor) and red fir (Abies magnifica)) studies established independently across northern California that underwent varying levels of thinning at each site. While some additional treatments such as fertilization were applied to some of the study sites, the primary focus was the effects of residual density following commercial thinning. The study sites include: Jennie Springs, Swain Mountain, and Swain Pole at Swain Mountain Experimental Forest within Lassen National Forest; Big Lake and Crater Peak at Lassen National Forest; Little Glass Mountain and Pumice Stone Mountain at Klamath National Forest; and LaTour site in LaTour Demonstration State Forest (California Department of Forestry and Fire Protection). Data collection years vary for each site, ranging from 1963 to 2023. Tree-level measurements at each site and plot include data such as: species, stand age, diameter at breast height, height, height to base of live crown, and tree condition. Two sites burned in the 2021 Dixie fire also include post-fire data collected in 2022 which include survival status, percentage crown volume affected and torched, crown scorch height and bark char height.
Original Distribution URL:  View help for Original Distribution URL https://www.fs.usda.gov/rds/archive/catalog/RDS-2025-0053

Scope of Project

Subject Terms:  View help for Subject Terms biota; Natural Resource Management & Use; Carbon; long-term silvicultural research plots; stand density; thinning; timber production; true fir; red fir; white fir; vegetation; forest resources; California; Swain Mountain Experimental Forest; Lassen National Forest; Klamath National Forest; Latour Demonstration State Forest
Geographic Coverage:  View help for Geographic Coverage California
Time Period(s):  View help for Time Period(s) 1963 – 2023
Data Type(s):  View help for Data Type(s) observational data
Collection Notes:  View help for Collection Notes DOI: https://doi.org/10.2737/RDS-2025-0053 Authors: Finley, Kaelyn A. ; Zhang, Jianwei Publication year: 2025 (Downloaded 2026-05-30)


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