Design criteria for interception studies. Helvey, undefined & J. H. Patric, J. D. 1966.
Design criteria for interception studies. [pdf]Paper  abstract   bibtex   
This report, gleaned from over 50 studies, defines variability of interception parameters and provides sampling designs for obtaining estimates to selected levels of probability for each parameter mean. A new method for estimating stemflow is outlined which greatly reduces variability inherent in the traditional single-tree method. These sampling and analytical methods will help ensure that results of different studies are comparable.

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