Cloquet Forestry Center
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Browsing Cloquet Forestry Center by Author "Ek, Alan R."
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Item Analysis of the Cloquet Forestry Center continuous forest inventory 1959-1990.(University of Minnesota, 1994-12) Tuhus, Erik H.; Walters, David K.; Ek, Alan R.This report describes procedures, analysis, and results from a study of the Cloquet Forestry Center continuous forest inventory (CFI). The CFI on the property was established in 1959 and plots have since been measured five additional times. Summary tables are presented for individual covertypes and for covertype aggregates, for all measurement years. Trends in covertype acreage, growing stock, age class, and size class distribution for the forest over the 31-year period are also discussed. This study was conducted using an Rbase 4.5 relational database on a PC. A description of Rbase command files developed and used in the study and necessary editing and changes made to the database are included as appendices.Item Assessment of the growth and yield potential of the Cloquet Forest with a computer-based growth projection model(University of Minnesota, 1980-12-01) Moeur, Melinda; Ek, Alan R.; Rose, DietmarA comprehensive data base consisting of permanent plot information from four survey years (1959 to 1976) was compiled for the Cloquet Forestry Center. Corresponding covertype data was developed and covertype maps were drafted. A distance-independent individual-tree-based growth model (MFPS) was used to project growth and yield for covertypes, with and without management. Management projections involved harvest by clearcut and subsequent regeneraton. Covertype summary table of initial inventories and projection results were produced by SUMREP, a computer program containing whole-tree biomass and product volume functions. Potential income from predicted first decade harvest of the red pine covertype is presented.Item Cloquet Forestry Center permanent plot records 1959-1976 : status report and plans for remeasurement.(University of Minnesota, 1982-07-01) Reber, Carol A.; Ek, Alan R.The Cloquet Forestry Center continuous forest inventory is one of the most extensive data sets of its kind in the Lake States. Numerous studies ranging from reproduction sampling analyses to the testing of growth projection models have been based on this data. This report describes the sampling design, observed variables and past analyses of the survey plus data management problems that affect its utility. Summary statistics are also presented for various cover type aggregates for past measurement dates. A discussion of forest development over time is followed with plans for the 1982 remeasurement.