Boise Cascade (Canada)

In 1995 a species/provenance test was established in the state of Puebla, Mexico to assess and compare the growth of Pinus greggii var. australis, P. maximinoi, P. patula and P. tecunumanii, including 10, 5, 11 and 4 provenances of each species, respectively. Each provenance test lot consisted of seed from 7 to 10 individual trees collected in natural stands. Range-wide samples were included in the test for P. greggii var. australis and P. patula. Material of P. maximinoi and P. tecunumanii from Guatemala, Honduras and Nicaragua, as well as Mexico was established in the test. The test site is in a mountainous area at 1440 m elevation, near 20 °N latitude. At 5 years of age significant differences were seen at both the species and provenance levels in survival, total height, diameter and volume. The overall test survival was 93%. Variance among species was three time greater than among provenances, comprising 25–33% of the total variation. P. maximinoi had the greatest height, diameter and volume (62 dm3) followed by P. tecunumanii (53 dm3). P. greggii var. australis had an average volume of 43 dm3 and P. patula produced 30 dm3. Although P. maximinoi had the lowest survival rate, the San Jeronimo provenance was the most productive of all 30 provenances tested; 98% survival and 73 dm3 volume. This was equivalent to 2.8 cm annual diameter increment and 2 m in height growth per year. Significant growth differences among provenances within species indicate that potential gain exists using provenance selection.

Abstract We developed a decision support system to address wildlife habitat quality in the strategic forest planning process. The process involves projecting wildlife habitat attributes using a growth and yield model, combining the attributes into an index of structural habitat quality, generating yield tables of structural habitat quality that can be constrained or optimized in the forest planning model, and relating prescriptions for each forest planning analysis area back to the habitat attributes. The result is a map of habitat components. This mechanism is considered the first step in our wildlife habitat assessment procedure in that it focuses on within-stand or within-analysis area structures. Since many wildlife species depend on multiple stands or analysis areas and the spatial arrangement of habitat components to meet their life requisites, the second step in our habitat assessment procedure is to apply spatially explicit wildlife habitat models to the mapped planning solution. The decision support system offers the capability to evaluate the effects of alternative management strategies on wildlife habitat in the context of a forest planning model solution. West. J. Appl. For 14(2):91-99.

Red raspberry (Rubus idaeus L.) seeds germinate only after seed coats are degraded. In nature this happens slowly. Seeds from recently collected fruit (fresh to four years old) germinated only after scarification of the seed coat by 20-minute soaking in concentrated sulfuric acid. Germination was not enhanced by: (1) short-term intermittent soaking, up to 81 hours, in dilute (0.01 normal) hydrochloric acid; (2) passage through the digestive tracts of bears, coyotes, or birds; (3) physical perturbations such as nicking, mechanical scarification, repeated freezing and thawing and/or four years of exposure in the field; (4) exposure to light; (5) increased temperatures or temperature fluctuations; or (6) addition of nitrogen (ammonium nitrate, urea). Key words: animal passage, germination, nitrogen, red raspberry, Rubus idaeus L., seed coat, seed weight, scarification, stratification

Summary form only given, as follows. The author looks at how engineer participation in the budgeting and scheduling of a research and development project affects the project's performance in these areas. Data were collected at a Federally Funded Research and Development Center (FFRDC). The FFRDC where the data were collected is involved in some projects which were of an exploratory nature and thus involve high levels of technical uncertainty. For this study, six projects were selected which span the range of projects from those with very little technical uncertainty to those with very high levels of technical uncertainty. The engineers on the six projects were surveyed regarding their participation in project budgeting and scheduling (response rate was 80.6 percent). The division leader for the division where the projects were housed rated each product's performance on budget and schedule as well as the project's overall performance. It was found that no correlation exists between engineer participation in project scheduling and budgeting and project schedule and budget performance. Further exploration via interviews found that it was how the inherent technical uncertainty was handled that seemed to drive project success.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">&gt;</ETX>

The use of small instead of large stumps for cable logging anchors will usually result in applied loads approaching the load capacity of the anchors more closely. The use of small stump anchors is then contingent on better means of assessing their capacity. The results of field load tests of Douglas-fir and western hemlock stump anchors are reported. Ultimate loads were modeled as power functions of DBH. In addition, the relation between load and movement relationships for the stumps are modeled using a hyperbolic function that also provides an estimate of ultimate load. Practical use of the model equations requires knowledge of failure statistics and the acceptance of a probabilistic anchor capacity. Probability is applied to the re-rigging required when an anchor fails to perform adequately and to total pull-out failure.

PURCHASING AND MATERIALS MANAGEMENT, by Joseph L. Cavinato, West Publishing Company, 1984.

The Journal of FinanceVolume 26, Issue 1 p. 182-183 Abstracts of Doctoral Dissertations THE DETERMINANTS OF MUNICIPAL BOND YIELDS* K. Larry Hastie, Boise Cascade CorporationSearch for more papers by this author K. Larry Hastie, Boise Cascade CorporationSearch for more papers by this author First published: March 1971 https://doi.org/10.1111/j.1540-6261.1971.tb00607.x †A dissertation completed at Cornell University in 1970. Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume26, Issue1March 1971Pages 182-183 RelatedInformation