Mountain pine beetle emergence in relation to depth of lodgepole pine bark (Google eBook)
U.S. Dept. of Agriculture, Forest Service, Intermountain Forest & Range Experiment Station, 1969 - Technology & Engineering - 8 pages
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62 percent algebraic analysis area of bark bark depth fig bark surface beetle emergence holes beetle production caged Cole combination of bark competition completed development data dead tree depth of lodgepole depth X stand diameter trees egg gallery elevation explained Emergence Observa emerging beetles explained an additional factors feet foot of bark given area given bark depth holes per square holes tions holes holes to bark inch on trees inch thick inches d.b.h. increased independent variables indicator of phloem infestation interaction killed in 1964 larvae lodgepole pine forest lodgepole pine killed lodgepole pine trees measurements mountain pine beetle multiple correlation coefficient numbers of beetle numbers of emergence phloem depth pine beetle emergence plot elevation Range relation of mountain reliable indicator significant square foot stand density table three variables tions holes tions total bark depth tree height trees of different trees usually variables combined variables explained variance in numbers variation