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Water oak (Quercus nigra L.[Fagaceae]), Nuttall oak (Q. nuttallii Palmer), and green ash (Fraxinus pennsylvanica Marsh. [Oleaceae]) were planted in mixtures at 2 spacings, 1.8 and 2.7m (6 and 9 ft) triangular spacing, on 2 contrasting soil types: Sharkey and Dundee. Survival was high for…
Author(s): Jefferey C. Goelz
Keywords: afforestation, competition, crown diameter, green ash, monoculture, Nuttall oak, species richness, water oak
Source: Native Plants Journal, Vol. 2, No. 1, Fall 2001 p. 98-104
Year: 2001
The expression RD = G/(Dg½), where G is basal area and Dg is quadratic mean stand diameter, provides a simple and convenient scale of relative stand density for Douglas-fir, equivalent to other generally accepted diameter-based stand density measures.
Author(s): R.O. Curtis
Keywords: Pseudotsuga menziesii, competition
Source: Forest Science. 28(1): 92-94
Year: 1982
The responses of Ips pini (Scolytidae) to multiple-funnel traps baited with the pheromone, ipsdienol, and various monoterpenes were determined in stands of lodgepole pine in southern and central British Columbia. Ips pini was attracted to both ipsdienol and ß-phellandrene, demonstrating that ß-…
Author(s): Daniel R. Miller, John H. Borden
Keywords: Kaimmone, ß-phellandrene, ipsdienol, monoterpenes, Ips pini, Coleoptera, Scolytidae, predators, competition, primary attraction, dose response
Source: Journal of Chemical Ecology, Vol. 16, No. 8, 1990
Year: 1990
To release a young pine plantation on a medium site in central California, herbicides and mulches were applied soon after planting to study their effectiveness. Bearclover is an aggressive shrub species that resprouts from rhizomes after disturbance, and must be controlled if young conifer…
Author(s): Philip M. McDonald, Glen A. Everest
Keywords: competition, plant development, northern California, replacement species, vegetation management
Source: Res. Note PSW-RN-419. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. 8 p
Year: 1996
On a poor site in northern California, a mature brushfield was treated in various ways that left initial density categories of light, medium, and heavy shrubs. Density, foliar cover, and height of seven shrub species (alone and combined) and ponderosa pine seedlings in these categories were…
Author(s): Philip M. McDonald
Keywords: competition, northern California, plant community development, ponderosa pine seedlings, poor site, silviculture
Source: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture; 28 p.
Year: 2003
Models of forest vegetation dynamics based on characteristics of individual trees are more suitable to predicting growth of multiple species and age classes than those based on stands. The objective of this study was to assess age- and site index-independent relationships between periodic diameter…
Author(s): Henry W. Mcnab, Thomas F. Lloyd
Keywords: accuracy, bias, competition, deciduous trees, diameter growth models, height-diameter relationships, validation
Source: Proceedings First International Conference on Measurements and Quantitative Methods and Management & The 1999 Southern Mensurationists Meeting. p 172-189
Year: 1999
Competition between ponderosa pine seedlings and various grasses and forbs was studied on :I site in northern Arizona burned in 1982 by a wildfire. Two-year-old pine seedlings were planted in 3.05 x 3.05 m plots in April 1983, followed by the sowing of grass and forb seeds on the same plots in…
Author(s): Katherine J. Elliott, Alan S. White
Keywords: competition, xylem water potential, nitrate, ammonium, Pinus ponderosa
Source: Forest Science. Vol. 33, No. 2, pp. 356-366 1987
Year: 1987
Seed weight, time of emergence, and three measures of seedling size were recorded for 39 open-pollinated Douglas-fir (Pseudotsuga menziesii var. menziesii[Mirb.] Franco) families in order to assess family variation in seed weight and emergence, and the influence of these seed…
Author(s): J.B. St. Clair, W.T. Adams
Keywords: Maternal effects, germinants, competition, heritability, genetic gain
Source: Forest Science. 37(4): 987-997
Year: 1991
Twenty years after aerial application of 2.24 kg ae/ha of the butoxy ethanol ester of 2,4,5-T [(2,4,5-trichlorophenoxy) acetic acid] to release grass stage longleaf pine (Pinus palustris Mill.) seedlings, stocking was the same for each of the three treated and control 4-ha plots. Treated plots,…
Author(s): J.L. Michael
Keywords: Benefit, pine release, herbicide, competition
Source: Weed Science. 28(3): 255-275
Year: 1980
Concomitant increases in atmospheric CO2 and 03 are expected to impact temperate forest ecosystems. Free air CO2 and 03 enrichment (FACE) was used to examine the interactive effects of these gases on shoot growth responses of quaking aspen grown in an experimental system (FACTS-II, Aspen FACE) in…
Author(s): Evan P. McDonald, E. L. Kruger, Don E. Riemenschneider, J. G. Isebrands
Keywords: Quakingaspen, elevated CO2, ozone, growth, competition
Source: Air Pollution, Global Change and Forest in the New Millennium. p. 58. (2001)
Year: 2001