Site Index and Height Growth Curves for Managed, Even-aged Stands of White Or Grand Fir East of the Cascades in Oregon and Washington, Volúmenes246-260
Collin D. Bevins, Donald L. Reukema, John Neisess, Kenneth W. Seidel, M. A. Radwan, P. H. Cochran, Paul E. Aho, R. Dennis Harr, Richard E. Miller
Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1978 - 21 páginas
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50 percent alternative analysis annual associated average basal area base Cascades caused changes classes clearcuts conifer construction costs cubic curves dead decade decay deer density determine developed diameter diets differences Douglas-fir effect elevation equation established estimated Experiment factors feet Figure fuel grand fir grass greater gross growing harvest height growth impacts inches included increased indicate land larger less logging mean measured million mineral mixed mortality National Forest natural occurred Oregon Pacific Northwest peak flow percent planted plots Portland present production programed Range regeneration region road roadless area sample season seed seedlings Serv shows site index slash slope soil spacing species stand Station stocking streamflow subsequent thinning timber treatment period trees per acre trend USDA values variables volume Washington watershed western winter withdrawn yield