scholarly journals 204 POTENTIAL OF BLOWN AIR AS A THIGMIC STRESS FOR TEMPORARY NONCHEMICAL PRIMOCANE SUPPRESSION OF RED RASPBERRY

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 458d-458
Author(s):  
T. Kostman ◽  
J. S. Cameron ◽  
C. Chen ◽  
S. F. Klauer
Keyword(s):  
Pacific Northwest ◽  
Fruit Development ◽  
Untreated Control ◽  
Red Raspberry ◽  
Chemical Methods ◽  
Competing Vegetation ◽  
The Pacific ◽  
Harvest Efficiency ◽  
Control Equivalent ◽  
Over Time

The red raspberry industry of the Pacific Northwest depends upon chemical primocane suppression to temporarily reduce competing vegetation during fruit development. This practice increases yield and harvest efficiency, but can reduce cane vigor, number and diameter over time. Few chemicals are available for this purpose and thus the potential of nonchemical alternatives is being explored. The purpose of this project was to evaluate the potential of blown air as a thigmic stress to temporarily suppress primocane growth. Blown air treatments were applied once (12 PM) or twice (12\4pm) per day, five days per week using a portable leaf blower generating winds of 273 km per hr. Treatments also included several rates of three experimental herbicides and an untreated control. All treatments were applied when primocanes were 10-15 cm in length and blown air treatments continued through fruit development. Primocane development was monitored over the course of the season. Blown air reduced primocane length by 15-30% prior to harvest giving control equivalent to current chemical methods. Blown air increased cane diameter but reduced yield by reducing fruit numbers. Reductions in fruit numbers are likely due to flowering\fruiting points removed by blown air.

Conclusion

2021 ◽  
pp. 136-150
Author(s):  
Crawford Gribben
Keyword(s):  
Pacific Northwest ◽  
Mass Culture ◽  
First Generation ◽  
Political Strategies ◽  
Top Down ◽  
Marketplace Of Ideas ◽  
Moral Majority ◽  
Religious Conservatism ◽  
The Pacific ◽  
Over Time

Paradoxically, the failure of the first generation of Christian Reconstructionists to cohere, either personally or ideologically, has worked in the movement’s favor, creating an internal marketplace of ideas by means of which competing groupings within political and religious conservatism have been able to appropriate and adopt their central arguments. Recognizing that a “moral majority” does not exist, and therefore abandoning the top-down political strategies of earlier evangelicals, the believers who participate in the migration to the Pacific Northwest work to build communities that will expand organically and over time to renew America and to replace the supposed neutrality of its legislative base. The project is working. But it is not clear whether the integrity of these ideas will continue as their audience base grows. Mass culture routinizes what was once regarded as radical, with effects that may not easily be predicted at the “end of white, Christian America.”

Soil and Douglas-fir (Pseudotsuga menziesii) foliar nitrogen responses to variable logging-debris retention and competing vegetation control in the Pacific Northwest

2010 ◽  
Vol 40 (2) ◽  
pp. 254-264 ◽  
Author(s):  
Robert A. Slesak ◽  
Timothy B. Harrington ◽  
Stephen H. Schoenholtz
Keyword(s):  
Pacific Northwest ◽  
Pseudotsuga Menziesii ◽  
Douglas Fir ◽  
Soil N ◽  
Vegetation Control ◽  
Competing Vegetation ◽  
Total Soil ◽  
The Pacific ◽  
N Acquisition ◽  
Total Soil N

Experimental treatments of logging-debris retention (0%, 40%, or 80% surface coverage) and competing vegetation control (initial or annual applications) were installed at two sites in the Pacific Northwest following clearcutting Douglas-fir ( Pseudotsuga menziesii (Mirb.) Franco var. menziesii) stands to assess short-term effects on tree N acquisition, soil N supply, and total soil N. Vegetation control treatments began in the first year after harvest, and logging-debris manipulations were installed 2 years after harvest. Annual vegetation control increased foliar N concentration and content in most years at both sites, which was associated with higher available soil N and increased soil water content. Logging-debris retention treatments had no detectable effect on any of the foliar variables or soil available N at either site. There were no treatment effects on total soil N at the site with relatively high soil N, but total soil N increased with logging-debris retention when annual vegetation control was applied at the site with a low initial soil N pool. Competing vegetation control is an effective means to increase tree N acquisition in the initial years after planting while maintaining soil N pools critical to soil quality. The effect of logging-debris retention on tree N acquisition appears to be limited during early years of stand development, but increased soil N with heavy debris retention at certain sites may be beneficial to tree growth in later years.

scholarly journals Towards Cross-Border Environmental Policy Spaces in North America: Province-State Linkages on the Canada-U.S. Border

AmeriQuests ◽  
2006 ◽  
Vol 3 (1) ◽  
Author(s):  
Debora L. VanNijnatten
Keyword(s):  
United States ◽  
Environmental Policy ◽  
New England ◽  
Case Studies ◽  
Pacific Northwest ◽  
Cross Border ◽  
The Pacific ◽  
Environmental Relations ◽  
Governance Arrangements ◽  
Over Time

A growing number of case studies have painted a picture of a burgeoning network of subnational and cross-border regional environmental linkages along the Canada-United States border, a development which may indicate an evolution in governance arrangements such that cross-border environmental policy spaces are being created. In addition to increasing in number, this literature suggests that cross-border interactions have become more formalized, more functionally intense and increasingly multilateral, or regional, in orientation. This paper explores in a comprehensive, cross-regional manner the finding of these case studies with regard to the extent and intensity of subnational activity by examining the findings of a 2005 survey of environmental linkages between states and provinces along the Canada-U.S. border. The survey findings indicate that subnational and regional interactions have been institutionally and functionally ‘intact’ for longer than most observers of Canada-U.S. environmental relations might expect. One of the most interesting findings is that subnational and regional cross-border environmental linkages, contrary to conventional wisdom, have become more numerous over time but not necessarily more intense in functional terms. Moreover, as expected, environmental linkages are clearly regionally concentrated; clusters of highly linked states and provinces can be found along the Canada-U.S. border, particularly in New England, the Great Lakes and the Pacific Northwest. Each of the clusters – or environmental regions – exhibits unique characteristics in terms of the extent and intensity of cross-border linkages.

scholarly journals Douglas-Fir Growth and Yield: Research 1909–1960

2004 ◽  
Vol 19 (1) ◽  
pp. 66-68 ◽  
Author(s):  
Robert O. Curtis ◽  
David D. Marshall
Keyword(s):  
Pacific Northwest ◽  
Douglas Fir ◽  
Early Research ◽  
Growth And Yield ◽  
Systematic Research ◽  
Research Publication ◽  
The Pacific ◽  
Over Time

Abstract Systematic research on growth and yield of Douglas-fir began in 1909. This line of early research evolved over time and culminated in publication of USDA Bulletin 201, The Yield of Douglas-fir in the Pacific Northwest. B201 had an enormous influence on development of Douglas-fir forestry and was arguably the most influential single research publication ever produced in the Pacific Northwest. We review the evolution of this research and some associated topics, and the role of the major personalities involved. West. J. Appl. For. 19(1):66–68.

scholarly journals SEASONAL CHANGE IN FREEZING TOLERANCE OF RED RASPBERRY CLONES IN THE PACIFIC NORTHWEST

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1087a-1087 ◽  
Author(s):  
Rita L. Hummel ◽  
Patrick P. Moore
Keyword(s):  
Pacific Northwest ◽  
Freezing Tolerance ◽  
Seasonal Changes ◽  
Vascular Tissue ◽  
Freeze Tolerance ◽  
Rubus Idaeus ◽  
Red Raspberry ◽  
The Pacific ◽  
Freeze Tolerant ◽  
Controlled Freezing

Seasonal changes in freezing tolerance of stems and buds of Rubus idaeus L. `Chilliwack', `Comox', `Meeker', `Skeena' and `Willamette' clones were measured from November through March of 1988-1989 and 1989-1990. Eight additional clones were tested in 1989-1990. Canes were harvested from the field, cut into two-bud samples and subjected to controlled freezing tests. Samples were seeded with ice, held at -2°C overnight and then frozen at 3°C/hour. Viability was estimated by visual browning. Vascular tissue at the base of the buds was the least freeze tolerant tissue in these samples. Results of both the 1988-1989 and 1989-1990 freezing tests, indicated `Meeker' and `Willamette' cold acclimated more slowly in the fall than `Chilliwack', `Comox' and `Skeena'. However, in the spring, `Willamette' and `Meeker' were slower to lose freeze tolerance than the other three clones.

scholarly journals How do changes in the population tested for chlamydia over time affect observed trends in chlamydia positivity? Analysis of routinely collected data from young women tested for chlamydia in family planning clinics in the Pacific Northwest (USA), between 2003 and 2010

Sexual Health ◽  
2015 ◽  
Vol 12 (6) ◽  
pp. 512 ◽  
Author(s):  
Sarah C. Woodhall ◽  
Lizzi Torrone ◽  
David Fine ◽  
Sarah G. Salomon ◽  
Wendy Nakatsukasa-Ono ◽  
...  
Keyword(s):  
Family Planning ◽  
Pacific Northwest ◽  
Public Health Service ◽  
Nucleic Acid Amplification ◽  
Routinely Collected Data ◽  
Behavioural Characteristics ◽  
The Pacific ◽  
Test Technology ◽  
Prevention Project ◽  
Over Time

Background The proportion of chlamydia tests that are positive (positivity) is dependent on the population tested and the test technology used. The way in which changes in these variables might affect trends in positivity over time is investigated. Methods: Data from 15- to 24-year-old women tested for chlamydia in family planning clinics participating in the Infertility Prevention Project in the Pacific Northwest, United States (USA Public Health Service Region X) during 2003–2010 (n = 590557) were analysed. Trends in positivity and in test, demographic and sexual behaviour variables were identified. Unadjusted and adjusted trends in chlamydia positivity were calculated using logistic regression. Results: The proportion of tests carried out using nucleic acid amplification tests (NAATs) increased dramatically during the analysis period in two states. Smaller changes in demographic and behavioural characteristics were seen. Controlling for test technology used had the largest effect on the trend in testing positive per year, leading to a fall in the calculated odds ratio of testing positive from 1.06 to 1.02 in Oregon, and from 1.07 to 1.02 in Idaho. Controlling for other variables had minimal effect on chlamydia positivity trends. Conclusions: Changes in NAAT use had a large effect on observed trends in chlamydia positivity over time in the two states where NAATs were introduced during the analysis period. While trends in chlamydia positivity may be a useful metric for monitoring chlamydia burden, it is important to consider changes in test type when interpreting these data.

Sign in / Sign up

Export Citation Format

Share Document