Few studies have directly compared denitrifying community composition and activities in soils by coupling molecular-genetic techniques and traditional measures of denitnfication. I investigated communities of denitrifying bacteria from adjacent meadow and forest soils in the Cascade Mountains, Oregon. A key gene in the denitrification pathway, N₂O reductase (nosZ), served as...
Research has shown that youth learn best by doing.1 Active involvement of the learner is the key. Teaching knowledge and skills by using a variety of tools and techniques will provide good learning experiences for all 4-H members. Remember that “learn by doing” is a basic concept in 4-H, and...
Published July 2002. Reprinted February 2010. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog
Now that youʼve had several club meetings and the members are excited about their project work, youʼd probably like to consider other
families. Ask at your local Extension office about the many 4-H activities available to your members. Watch for announcements and descriptions of these in your county 4-H newsletters...
• How to recruit 4-H members and how many should we have?
• How can I enroll my group as a 4-H club?
• What about project materials?
• Are there dues for 4-H members?
• What about insurance?
• Where will our club meet?
• How often will our...
Welcome! Youʼve volunteered and have been selected to be a new 4-H leader! Congratulations! You are starting an interesting, challenging, and rewarding experience. Because we know you have lots of questions about this new venture, we believe youʼll fi nd the following information
helpful.
As you feel comfortable with one aspect of the program, youʼll want to challenge yourself to take on new leadership experiences. Youʼve probably discovered that, along with your members, you, too, are gaining new knowledge. Many opportunities are available for 4-H leaders to learn more about the 4-H program, make...
You have been elected to an office in your 4-H club because your fellow club members trust you to do a good job. The success of your 4-H club depends largely on how well you and your fellow officers carry out your duties. Good officers get things done correctly and...
Improved water use efficiencies in irrigated agriculture are necessary to assist in coping with the accelerating demand and economic competition for the world's fresh water supply and increasing ecological concerns. This will likely rely in part on optimum irrigation, which implies regulated deficit irrigation. While conventional irrigation management is intended...
This publication is a compilation of vegetable variety trial notes from field trials conducted in summer 2010. It contains information on a wide variety of vegetables and focuses on quality characteristics and adaptability to western Oregon.
Black vine weevil (BVW), Otiorhynchus sulcatus Fabricius, is a serious pest in cranberry, Vaccinium macrocarpon. Larvae feeding below the soil surface cause damage to the roots and underground stems. Knowledge is sparse in regard to the damage potential of BVW in Pacific Northwest cranberry beds. Control with insecticides is limited...
Distributed deformation in the backarc of Cascadia is complex. Off the west coast lies the Cascadia convergent margin. East of the plate boundary, clockwise rotation of the Oregon Coast Range block with respect to stable North America influences backarc deformation, causing extensional faults in southeast Oregon, contraction folding in southeast...
In the Pacific Northwest, fires are a natural part of the changing landscape. As homeowners continue to build in the wildland-urban interface, they must take special precautions to protect their lives, homes, and property.
Relationships between the structure and composition of riparian vegetation
with channel morphology were examined in three montane meadow streams in the
headwaters of the Upper Grande Ronde River and North Fork John Day River in the
Blue Mountains, northeast Oregon. Vegetation composition, root biomass, and
channel morphology cross-sections were sampled...
Annual applications of fresh or composted dairy manure were assessed for their effects on root rots of sweet corn and snap bean and damping-off of cucumber in a field soil. Soil biological and physical properties were measured as possible indicators of root rot suppressive potential. Regardless of amendment type or...
Tile drainage increases aeration in the root zone of poorly drained soils by
accelerating water movement from the subsurface. Water movement is the main agent
of chemical transport, either transporting soluble materials directly (e.g., nitrate) or by
transporting the soil particles that bind adsorptive compounds (e.g., pesticides). The
detection frequency...
A documented case history of riparian grazing at Oregon State University's Soap Creek Ranch was conducted from 1999 to 2001. Impacts of four different riparian grazing treatments were evaluated. Emphasis was placed on investigating the relationship between riparian cattle use and water quality. Through a series of carefully designed and...
A variety of soil properties have been proposed and tested as potential
indicators of soil quality. This study was conducted in an effort to produce a
standardized soil quality index for systems in Oregon. Soils in both forested and
agricultural systems were sampled in a wide variety of locations, climates,...
This dissertation demonstrates how Social Cognitive Theory (Bandura, 1986,
1997) can be successfully applied to Counselor academic advising interventions, in
order to increase students' self-efficacy and self-regulated learning (Zimmerman,
2000) in academic planning as learned outcomes. This was accomplished by (a)
reviewing the academic advising literature and showing the current...