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Creator:: Moberg, Dean P., Johnson, Richard L., and Sullivan, Dan M.
Abstract:: Ion exchange resin/soil cores are a common in situ approach to estimating soil nitrogen (N) mineralization rates. However, no studies compare the two common methods of core preparation (disturbed and undisturbed). The objective of our study was to compare N mineralized and soil temperature in disturbed versus undisturbed cores of...
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Full Text:: during summer and winter. A total of 13 soil / incubation-period combinations were tested. Disturbed

Creator:: Reich, Inga, Jessie, Casi, Ahn, Seung-Joon, Choi, Man-Yeon, Williams, Christopher, Gormally, Mike, and Mc Donnell, Rory
Abstract:: Many studies have shown that ground beetles feed on different agricultural pests, but little is known about their species communities from US cropping systems. We assessed the biological control potential of the most common carabid beetle species in Oregon annual ryegrass grown for seed by investigating spatial and temporal overlap...
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Full Text:: laetulus—were also found to have consumed pests, they were active only during spring and summer, when crop

Creator:: Wysocki, Donald J., Chastain, Thomas G., Schillinger, William F., Guy, Stephen O., and Karow, Russell S.
Abstract:: Camelina (Camelina sativa L. Crantz) has received worldwide attention in recent years as a biofuel crop and as a broadleaf option in cereal-based cropping systems. The objective of our 3-year study was to determine camelina seed yield and nitrogen use efficiency (NUE) as affected by six applied nitrogen (N) rates...
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Full Text:: majority of precipitation occurs 29 in the winter and summers are comparatively dry. Camelina responded

Creator:: Demirozer, Ozan, Tyler-Julian, Kara, Funderburk, Joe, Leppla, Norm, and Reitz, Stuart
Abstract:: BACKGROUND: The spread of the western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae), resulted in the worldwide destabilization of established integrated pest management programs for many crops. Efforts to control the pest and the thrips-vectored tospoviruses with calendar applications of broad-spectrum insecticides have been unsuccessful. The result has been a...
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Full Text:: Pests, ed. by Lewis T. CAB International, Wallingford, Oxon, UK, pp. 197–216 (1997). 2 Childers CC

Creator:: Kimoto, Chiho, DeBano, Sandra J., Thorp, Robbin W., Taylor, Robert V., Schmalz, Heidi, DelCurto, Timothy, Johnson, Tracey, Kennedy, Patricia L., and Rao, Sujaya
Abstract:: Rangelands are significant providers of ecosystem services in agroecosystems world‐wide. Yet few studies have investigated how different intensities of livestock grazing impact one important provider of these ecosystem services—native bees. We conducted the first large‐scale manipulative study on the effect of a gradient of livestock grazing intensities on native bees...
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Full Text:: that make up 35% of the world’s food supply (NRC 2007). The fitness of many cross-pollinat- ed, non

Creator:: Gavin, W. E., Mueller-Warrant, G. W., Griffith, S. M., and Banowetz, G. M.
Abstract:: Slugs are common pests of grass seed fields in western Oregon and the current focus of repeated, and often unsuccessful, efforts by growers to control them using molluscicides. Here we document rapid loss of molluscicidal bait pellets to earthworms and the resulting adverse effects on slug control. Three years of...
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Full Text:: annual precipitation� 1000mm) and dry, moderate summers. Contrasting tillage practices employed at these

Creator:: Marks, Jade A., Pett-Ridge, Julie C., Perakis, Steven S., Allen, Jessica L., and McCune, Bruce
Abstract:: Nitrogen-fixing lichens (cyanolichens) are an important source of nitrogen (N) in Pacific Northwest forests, but limitation of lichen growth by elements essential for N fixation is poorly understood. To investigate how nutrient limitation may affect cyanolichen growth rates, we fertilized a tripartite cyanobacterial lichen (Lobaria pulmonaria) and a green algal...
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Full Text:: , widely distributed, well studied, and easily transplant- ed. Not only is it of conservation concern as an

Creator:: Taylor, Anne E., Zeglin, Lydia H., Wanzek, Thomas A., Myrold, David D., and Bottomley, Peter J.
Abstract:: It is well known that the ratio of ammonia oxidizing archaea (AOA) and bacteria (AOB) ranges widely in soils, but no data exist on what might influence this ratio, its dynamism, or how changes in relative abundance influences the potential contributions of AOA and AOB to soil nitrification. By sampling...
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Full Text:: Characterization of study site. Corvallis OR has cool wet winters and warm dry summers 171 which is reflected in

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