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STATISTICAL ISSUES FOR SEEDLING STUDIES IN AIR POLLUTION RESEARCH
Citation:
Peterson, C. STATISTICAL ISSUES FOR SEEDLING STUDIES IN AIR POLLUTION RESEARCH. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/D-89/110 (NTIS PB90113143).
Description:
By the very nature that seedlings represent the future forests, they are an important population for exposure studies. he experimental conditions for seedling studies cover a wide range of treatment combinations, facilities, and exposure regimes. he experimental utilization of experimental studies with tree seedlings requires the appropriate design and statistical concepts employed with any population response study. hese issues are reviewed for their relevance to exposure studies and contribution toward studies of forest/tree response to pollutants. n order to realize the potential strengths of these studies and further enhance the intrinsic value of seedling research, the planning of experiments should include both the relevant population of interest and an explicit definition (a priori) of all response variables and covariates. The experimental designs should provide for pretreatment measurements, repeated measures within growing seasons, and treatments or measurements which span more than one growing season.
