Record Display for the EPA National Library CatalogRECORD NUMBER: 8 OF 8
|Main Title||Regional Variation in Growth Response of Coastal Douglas-Fir to Nitrogen Fertilizer in the Pacific Northwest.|
|Author||Peterson, C. E. ; Hazard, J. W. ;|
|CORP Author||NSI Technology Services Corp., Corvallis, OR.;Corvallis Environmental Research Lab., OR.|
|Additional Subjects||Plant growth ; Forestry ; Dose-response relationships ; Coastal regions ; Comparative evaluation ; Tables(Data) ; Graphs(Charts) ; Nitrogen fertilizers ; Reprints ; Douglas fir ; Pseudotsuga menziesii ; Tsuga heterophylla ; Pacific Northwest Region(United States)|
Hypothesis-testing for differences in growth responses among physiographic strata, thinning levels, and fertilizer dosage levels resulted in a set of empirical models for predicting volume increment response of even-aged coastal Douglas-fir to nitrogen fertilizer. Absolute and percent responses are estimated for stands both thinned and unthinned, as a function of dosage levels and physiographic provinces. Although not 'highly' significant, the physiographic factor was retained in the models for purposes of refinement.