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Stratification Gains in Cruising: Proportional Allocation

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Stratification with proportional allocation can reduce the number of plots needed or improve accuracy in a cruise. The greatest gains from stratification occur when the stratum volumes per acre are very different, and the stratum sizes are equal. A formula for calculating the gain from stratification with proportional allocation is given. The gain from two strata with three levels of relative stratum size is shown. An example is calculated for three strata. Criteria for number of strata and stratum selection are discussed. South. J. Appl. For.:17(2):96-99.

Document Type: Journal Article

Affiliations: Forestry Department, VPISU, Blacksburg, VA 24061

Publication date: May 1, 1993

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Southern Journal of Applied Forestry covers an area from Virginia and Kentucky south to as far west as Oklahoma and east Texas.
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