A comparison of annual transpiration and productivity in monoculture and mixed-species Douglas-fir and red alder stands

2011 ◽  
Vol 262 (12) ◽  
pp. 2263-2270 ◽  
Author(s):  
Georgianne W. Moore ◽  
Barbara J. Bond ◽  
Julia A. Jones
Keyword(s):  
Douglas Fir ◽  
Mixed Species ◽  
Red Alder

The economics of Douglas-fir and red alder management with stochastic price trends

1993 ◽  
Vol 23 (8) ◽  
pp. 1695-1703 ◽  
Author(s):  
Robert G. Haight
Keyword(s):  
Pacific Northwest ◽  
Financial Analysis ◽  
Probability Distributions ◽  
Low Cost ◽  
The United States ◽  
Douglas Fir ◽  
Mixed Species ◽  
Red Alder ◽  
Commercial Thinning ◽  
Price Trends

A financial analysis of Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco) and red alder (Alnusrubra Bong.) management is conducted using yield projections from the Stand Projection Simulator for the Pacific Northwest region of the United States. The analysis includes uncertainty in the price trends and stocking levels of both species following reforestation. Results from a case study in which Douglas-fir price is likely to increase faster than red alder price show that (i) on more productive sites, greater regeneration investment is justified to increase the likelihood of Douglas-fir establishment; (ii) on less productive sites, low-cost regeneration options that produce mixed-species stands have expected present values close to or greater than a high-cost Douglas-fir regeneration effort; (iii) optimal precommercial removal of red alder depends on midrotation prices and regeneration success, and in many cases growing a mixed-species stand to maturity produces the highest economic return; (iv) commercial thinning of Douglas-fir increases the expected present value of the most intensive regeneration option by up to 10%. The low-cost regeneration options have relatively high expected returns because of low initial investments and the presence of two species that may have high values in the future. The sensitivity of these results to changes in the probability distributions of regeneration success and price trends is discussed.

Influence of Particle Size on Decomposition of Red Alder and Douglas Fir Sawdust in Soil

Nature ◽  
1965 ◽  
Vol 205 (4975) ◽  
pp. 991-993 ◽  
Author(s):  
J. L. NEAL ◽  
W. B. BOLLEN ◽  
K. C. LU
Keyword(s):  
Particle Size ◽  
Douglas Fir ◽  
Red Alder

Crop Rotation of Douglas-Fir and Red Alder: A Preliminary Biological and Economic Assessment

1979 ◽  
Vol 140 ◽  
pp. S102-S107 ◽  
Author(s):  
W. A. Atkinson ◽  
B. T. Bormann ◽  
D. S. de Bell
Keyword(s):  
Crop Rotation ◽  
Economic Assessment ◽  
Douglas Fir ◽  
Red Alder

Spatial extent of impact of red alder on soil chemistry of adjacent conifer stands

1992 ◽  
Vol 22 (9) ◽  
pp. 1434-1437 ◽  
Author(s):  
Charles C. Rhoades ◽  
Dan Binkley
Keyword(s):  
Soil Ph ◽  
Soil Chemistry ◽  
Douglas Fir ◽  
Spatial Extent ◽  
N Availability ◽  
Soil N ◽  
Mixed Stands ◽  
Red Alder ◽  
Soil N Availability ◽  
River Site

We examined patterns in soil N availability and pH along transects extending from mixed stands of conifers (mostly Douglas-fir (Pseudotsugamenziesii (Mirb.) Franco)) and red alder (Alnusrubra Bong.) to pure conifer stands at two locations. At the relatively infertile Wind River site, increased N availability was apparent for about 8–12 m downslope of the alder–conifer stand, but no effect was apparent upslope. At the fertile Cascade Head site, no trend was apparent in N availability across the stand boundaries, but soil pH in the conifer stand was depressed for about 5 m from the alder–conifer stand. Overall, the effects of alder on soil chemistry appeared limited to a distance of less than half the height of the trees.

Effects of variations in stand structure on development of mixed-species stands in eastern Washington

1993 ◽  
Vol 23 (3) ◽  
pp. 545-552 ◽  
Author(s):  
David F. Cobb ◽  
Kevin L. O'hara ◽  
Chadwick D. Oliver
Keyword(s):  
Stand Structure ◽  
Lodgepole Pine ◽  
Douglas Fir ◽  
Cascade Range ◽  
Stand Development ◽  
Mixed Species ◽  
Western Larch ◽  
Development Patterns ◽  
Large Numbers ◽  
Eastern Washington

The development of six mixed-species, even-aged stands was reconstructed in the eastern Washington Cascade Range. All stands were within the Grand Fir Climax Series and began following stand replacement disturbances. Western larch (Larixoccidentalis Nutt.) and lodgepole pine (Pinuscontorta Dougl. ex Loud.), when present, formed an upper stratum over interior Douglas-fir (Pseudotsugamenziesii var. glauca (Beissn.) Franco) and grand fir (Abiesgrandis (Dougl.) Lindl.) in all six stands. Establishment patterns and species composition affected stand development patterns. Douglas-fir benefitted from the absence of lodgepole pine; grand fir benefitted from the absence of Douglas-fir, but apparently not from the absence of lodgepole pine. Lodgepole pine had faster initial diameter growth rates than western larch when it became established relatively early and in large numbers.

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