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Quantifying the differential competitive effect of hardwood and coniferous species on Douglas-fir growing in southwestern Oregon mixed conifer forests (USA)

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Academic year: 2020

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Figure

Figure 1. Map of United States of America and area of study.
Figure 2 shows the localizations of the study stands. This figure also distinguishes the  type  of  stands  by  color:  pure  Douglas-fir  stands  (red  color),  mixed-conifer  stands  (yellow  color)  and  mixed  hardwood  stands  (green  color)
Figure 3. Mean annual precipitation in Oregon (U.S. Weather Bureau 1960)
Figure 4. Basic Plot design (Department of Forest Management, Hann D. W., 1983)
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