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    Author(s): Mark H. HansenGary J. Brand; Daniel G. Wendt; Ronald E. McRoberts
    Date: 2001
    Source: In: Reams, Gregory A.; McRoberts, Ronald E.; Van Deusen, Paul C., eds. 2001. Proceedings of the second annual Forest Inventory and Analysis symposium; 2000 October 17-18; Salt Lake City, UT. Gen. Tech. Rep. SRS-47. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 109-113
    Publication Series: Miscellaneous Publication
    PDF: View PDF  (433 KB)

    Description

    The first year of annual FIA data collection in the North Central region was completed for 1999 in Indiana, Iowa, Minnesota, and Missouri. Estimates of timberland area, total growing-stock volume and growing-stock volume per acre are presented. These estimates are based on data from 1 year, collected at the base Federal inventory intensity, a lower intensity sample than previous periodic inventories conducted in these States. In the North Central region, plots are measured on a 5-year cycle (20 percent of the plots measured each year) at a base intensity of one plot per 5,937 ac. These first-year estimates, obtained from the 20 percent sample, are based on a sample intensity of one plot per 29,685 ac and, thus, have greater sampling variability than previous periodic inventories conducted by FIA.

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Hansen, Mark H.; Brand, Gary J.; Wendt, Daniel G.; McRoberts, Ronald E. 2001. Estimation on the First Cycle of the Annual Forest Inventory System: Methods, Preliminary Results, and Observations. In: Reams, Gregory A.; McRoberts, Ronald E.; Van Deusen, Paul C., eds. 2001. Proceedings of the second annual Forest Inventory and Analysis symposium; 2000 October 17-18; Salt Lake City, UT. Gen. Tech. Rep. SRS-47. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 109-113

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