Search

Search Results

• 1771. [Article] Drip irrigation guide for onion growers

  Published December 2005. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Drip irrigation guide for onion growers Author: Shock, Cedric A., Feibert, Erik Bruno Goncalves, Flock, Rebecca, Oregon State University. Extension Service, Shock, C. C. (Clinton C.) Published December 2005. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Drip irrigation guide for onion growers Author: Shock, Cedric A., Feibert, Erik Bruno Goncalves, Flock, Rebecca, Oregon State University. Extension Service, Shock, C. C. (Clinton C.) Published December 2005. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 1772. [Article] Drip irrigation guide for growers of hybrid poplar

  Published December 2005. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Drip irrigation guide for growers of hybrid poplar Author: Pereira, Andre, O'Neill, Mick, Feibert, Erik Bruno Goncalves, Flock, Rebecca, Oregon State University. Extension Service, Shock, C. C. (Clinton C.) Published December 2005. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Drip irrigation guide for growers of hybrid poplar Author: Pereira, Andre, O'Neill, Mick, Feibert, Erik Bruno Goncalves, Flock, Rebecca, Oregon State University. Extension Service, Shock, C. C. (Clinton C.) Published December 2005. Revised January 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 1773. [Article] Problem thistles of Oregon

  Published December 2006. Reviewed July 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog

  Citation × Citation Citation Abstract Copy Title: Problem thistles of Oregon Author: Butler, Tim, 1958-, French, Ken, Burrill, L. C., Oregon State University. Extension Service Published December 2006. Reviewed July 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Problem thistles of Oregon Author: Butler, Tim, 1958-, French, Ken, Burrill, L. C., Oregon State University. Extension Service Published December 2006. Reviewed July 2013. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 1774. [Article] Effects of selected changes in Federal land use on a rural economy

  Published March 1968. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog...

  Citation × Citation Citation Abstract Copy Title: Effects of selected changes in Federal land use on a rural economy Author: Blanch, Grant E. (Grant Etherington), 1915-, Bromley, D. W., Stoevener, H. H., Oregon State University. Agricultural Experiment Station Published March 1968. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Title: Effects of selected changes in Federal land use on a rural economy Author: Blanch, Grant E. (Grant Etherington), 1915-, Bromley, D. W., Stoevener, H. H., Oregon State University. Agricultural Experiment Station Published March 1968. Facts and recommendations in this publication may no longer be valid. Please look for up-to-date information in the OSU Extension Catalog: http://extension.oregonstate.edu/catalog Close

• 1775. [Article] Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon

  The Calapooia River, a major tributary of the Willamette River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and private forested lands occur in the steep Upper ...

  Citation × Citation Citation Abstract Copy Title: Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon Author: Floyd, William C. The Calapooia River, a major tributary of the Willamette River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and private forested lands occur in the steep Upper Zone of the watershed, mixed forest and agriculture lands are found in the Middle Zone, and the Lower Zone of the watershed is comprised primarily of grass seed agriculture on relatively flat topography with poorly drained soils. High levels of dissolved nitrogen (DN) have been identified as a water-quality concern within the Calapooia River. To gain a better understanding of the relationship between landuse/landcover (LULC), soil drainage, and DN dynamics within the watershed on a seasonal basis, we selected 44 sub-basins ranging in size between 3 and 33 km² for monthly synoptic surface water-quality sampling from October 2003 through September 2004. We selected an additional 31 sample locations along the length of the Calapooia River to determine relative influence of the 44 sub-basins on DN concentrations in the river. T-tests were used to analyze differences between zones (Upper, Middle and Lower) and regression analysis was used to determine relationships between DN and LULC or soil drainage class. The agriculture-dominated sub-basins had significantly higher (< 0.05) DN concentrations than the predominantly forested sub-basins. Winter concentrations of nitrate-N were 43 times higher in agriculturally dominated sub-basins than in forested sub-basins, whereas in the spring, the difference was only 7-fold. High DN concentrations associated with the predominantly agriculture sub-basins were substantially reduced once they mixed with water in the Calapooia River, highlighting the likelihood that water draining the relatively nutrient-poor, forested sub-basins from the Upper Zone of the watershed, was diluting DN-rich water from the agriculture sub-basins. Relationships between DN and agriculture, woody vegetation or poorly drained soils were moderate to strong (0.50 < R² > 0.85) during the winter, spring and summer seasons. Results indicated an exponential increase in DN concentration when proportion agriculture or poorly drained soils increased, whereas an increase in woody vegetation was related to an exponential decrease in DN concentration. The high variability in DN concentration in the agriculture-dominated sub-basins suggests factors in addition to LULC and poorly drained soils influence DN in surface water. Seasonal relationships were developed between DN and proportion of poorly drained soils, agriculture, and woody vegetation at differing scales (10 m, 20 m, 30 m, 60 m, 90 m, 150 m, 300 m, and entire sub-basin), which we defined as Influence Zones (IZs), surrounding the stream network. Correlations between DN and proportion LULC or poorly drained soil at each IZ were analyzed for significant differences (p-value < 0.05) using the Hotelling-Williams test. Our results show strong seasonal correlations (r > 0.80) between DN and proportion of woody vegetation or agriculture, and moderate-to-strong seasonal correlations (r > 0.60) between DN and proportion of sub-basins with poorly drained soils. Altering scale of analysis significantly changed correlations between LULC and DN, with IZs < 150 m generally having higher correlations than the sub-basin level. In contrast, DN correlations with poorly drained soil were generally higher at the sub-basin scale than the 60- through 10-m IZs during winter and spring. These results indicate that scale of analysis is an important factor when determining relationships between DN concentration and proportion LULC or poorly drained soils. Furthermore, seasonal shifts in significant differences among IZs for correlations between LULC and DN suggest land management proximity and its influence on DN concentration changes temporally. DN relationships with poorly drained soil suggest that during winter and spring, when rainfall is highest, sub-basin scale soil drainage properties have a greater influence on DN than soil properties within IZs in close proximity to the stream network. Title: Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon Author: Floyd, William C. The Calapooia River, a major tributary of the Willamette River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and private forested lands occur in the steep Upper Zone of the watershed, mixed forest and agriculture lands are found in the Middle Zone, and the Lower Zone of the watershed is comprised primarily of grass seed agriculture on relatively flat topography with poorly drained soils. High levels of dissolved nitrogen (DN) have been identified as a water-quality concern within the Calapooia River. To gain a better understanding of the relationship between landuse/landcover (LULC), soil drainage, and DN dynamics within the watershed on a seasonal basis, we selected 44 sub-basins ranging in size between 3 and 33 km² for monthly synoptic surface water-quality sampling from October 2003 through September 2004. We selected an additional 31 sample locations along the length of the Calapooia River to determine relative influence of the 44 sub-basins on DN concentrations in the river. T-tests were used to analyze differences between zones (Upper, Middle and Lower) and regression analysis was used to determine relationships between DN and LULC or soil drainage class. The agriculture-dominated sub-basins had significantly higher (< 0.05) DN concentrations than the predominantly forested sub-basins. Winter concentrations of nitrate-N were 43 times higher in agriculturally dominated sub-basins than in forested sub-basins, whereas in the spring, the difference was only 7-fold. High DN concentrations associated with the predominantly agriculture sub-basins were substantially reduced once they mixed with water in the Calapooia River, highlighting the likelihood that water draining the relatively nutrient-poor, forested sub-basins from the Upper Zone of the watershed, was diluting DN-rich water from the agriculture sub-basins. Relationships between DN and agriculture, woody vegetation or poorly drained soils were moderate to strong (0.50 < R² > 0.85) during the winter, spring and summer seasons. Results indicated an exponential increase in DN concentration when proportion agriculture or poorly drained soils increased, whereas an increase in woody vegetation was related to an exponential decrease in DN concentration. The high variability in DN concentration in the agriculture-dominated sub-basins suggests factors in addition to LULC and poorly drained soils influence DN in surface water. Seasonal relationships were developed between DN and proportion of poorly drained soils, agriculture, and woody vegetation at differing scales (10 m, 20 m, 30 m, 60 m, 90 m, 150 m, 300 m, and entire sub-basin), which we defined as Influence Zones (IZs), surrounding the stream network. Correlations between DN and proportion LULC or poorly drained soil at each IZ were analyzed for significant differences (p-value < 0.05) using the Hotelling-Williams test. Our results show strong seasonal correlations (r > 0.80) between DN and proportion of woody vegetation or agriculture, and moderate-to-strong seasonal correlations (r > 0.60) between DN and proportion of sub-basins with poorly drained soils. Altering scale of analysis significantly changed correlations between LULC and DN, with IZs < 150 m generally having higher correlations than the sub-basin level. In contrast, DN correlations with poorly drained soil were generally higher at the sub-basin scale than the 60- through 10-m IZs during winter and spring. These results indicate that scale of analysis is an important factor when determining relationships between DN concentration and proportion LULC or poorly drained soils. Furthermore, seasonal shifts in significant differences among IZs for correlations between LULC and DN suggest land management proximity and its influence on DN concentration changes temporally. DN relationships with poorly drained soil suggest that during winter and spring, when rainfall is highest, sub-basin scale soil drainage properties have a greater influence on DN than soil properties within IZs in close proximity to the stream network. Close

• 1776. [Article] Forage Fish in the California Current Large Marine Ecosystem: Ecological Linkages, Current Catches and Values

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: Forage Fish in the California Current Large Marine Ecosystem: Ecological Linkages, Current Catches and Values Author: Cisneros-Montemayor, Andres, Sumaila, Rashid Abstract only. Title: Forage Fish in the California Current Large Marine Ecosystem: Ecological Linkages, Current Catches and Values Author: Cisneros-Montemayor, Andres, Sumaila, Rashid Abstract only. Close

• 1777. [Article] The Evolution Fish Biodiversity: A Time Series Aproach

  Abstract only.

  Citation × Citation Citation Abstract Copy Title: The Evolution Fish Biodiversity: A Time Series Aproach Author: Del Valle Erkiaga, Ikerne, Astorkiza, Inma, Astorkiza, Kepa Abstract only. Title: The Evolution Fish Biodiversity: A Time Series Aproach Author: Del Valle Erkiaga, Ikerne, Astorkiza, Inma, Astorkiza, Kepa Abstract only. Close

• 1778. [Article] Oregon Wildlife; Vol.46 No.5 (September-October 1990)

  Contents: Heap Leach Mining - p.4-6; Restoration and Enhancement Update - p.7-9; Land Way Down Under [Studying ocean habitats using a submarine] - p.10-11; Banding Together to Solve the Migration Mystery ...

  Citation × Citation Citation Abstract Copy Title: Oregon Wildlife; Vol.46 No.5 (September-October 1990) Author: Oregon. Department of Fish and Wildlife Contents: Heap Leach Mining - p.4-6; Restoration and Enhancement Update - p.7-9; Land Way Down Under [Studying ocean habitats using a submarine] - p.10-11; Banding Together to Solve the Migration Mystery - p.12; Peregrine Falcons: The Long Way Back [Collecting migration information to counter extinction] - p.13; Sichuans, Sharp-tails, and Blues: ODFW Works for the Hunter [Sharp-tailed grouse reintroduction] - p.14-15 Title: Oregon Wildlife; Vol.46 No.5 (September-October 1990) Author: Oregon. Department of Fish and Wildlife Contents: Heap Leach Mining - p.4-6; Restoration and Enhancement Update - p.7-9; Land Way Down Under [Studying ocean habitats using a submarine] - p.10-11; Banding Together to Solve the Migration Mystery - p.12; Peregrine Falcons: The Long Way Back [Collecting migration information to counter extinction] - p.13; Sichuans, Sharp-tails, and Blues: ODFW Works for the Hunter [Sharp-tailed grouse reintroduction] - p.14-15 Close

• 1779. [Article] Oregon Wildlife; Vol.37 No.12 (December 1982)

  Contents: Why do the Indians "Get All the Fish?" [Columbia River closed to non-Native American chinook fishing in September] - p.3-6; Sportsmen Work for Wildlife - p.7; It Was a Blast! [Using pyrotechnics ...

  Citation × Citation Citation Abstract Copy Title: Oregon Wildlife; Vol.37 No.12 (December 1982) Author: Oregon. Department of Fish and Wildlife Contents: Why do the Indians "Get All the Fish?" [Columbia River closed to non-Native American chinook fishing in September] - p.3-6; Sportsmen Work for Wildlife - p.7; It Was a Blast! [Using pyrotechnics to create ponds] - p.8-9; Managing Timber for Wildlife - p.10-11; O&C Wildlife on the Way Out? [Logging Oregon and California lands] - p.12-13; American Avocet - p.13 Title: Oregon Wildlife; Vol.37 No.12 (December 1982) Author: Oregon. Department of Fish and Wildlife Contents: Why do the Indians "Get All the Fish?" [Columbia River closed to non-Native American chinook fishing in September] - p.3-6; Sportsmen Work for Wildlife - p.7; It Was a Blast! [Using pyrotechnics to create ponds] - p.8-9; Managing Timber for Wildlife - p.10-11; O&C Wildlife on the Way Out? [Logging Oregon and California lands] - p.12-13; American Avocet - p.13 Close

• 1780. [Article] An evaluation of the ocean recreational Dungeness crab fishery on the Oregon coast, 1999 (draft)

  "Recent concerns have been raised by commercial crab interests relating to the size and character of the recreational fishery for dungeness crab in ocean waters off Oregon. In response to those concerns, ...

  Citation × Citation Citation Abstract Copy Title: An evaluation of the ocean recreational Dungeness crab fishery on the Oregon coast, 1999 (draft) Author: Schindler, Eric, Oregon. Dept. of Fish and Wildlife. Marine Resources Program "Recent concerns have been raised by commercial crab interests relating to the size and character of the recreational fishery for dungeness crab in ocean waters off Oregon. In response to those concerns, in May of 1999 the Oregon Department of Fish and Wildlife's Ocean Sampling Project began counting the number of ocean caught dungeness crab on charter and private recreational boats. These counts of crab, and the corresponding estimate of total recreational ocean crab catch, were included in the same sampling project that is used to estimate recreational ocean salmon and groundfish landings." (Introduction) Title: An evaluation of the ocean recreational Dungeness crab fishery on the Oregon coast, 1999 (draft) Author: Schindler, Eric, Oregon. Dept. of Fish and Wildlife. Marine Resources Program "Recent concerns have been raised by commercial crab interests relating to the size and character of the recreational fishery for dungeness crab in ocean waters off Oregon. In response to those concerns, in May of 1999 the Oregon Department of Fish and Wildlife's Ocean Sampling Project began counting the number of ocean caught dungeness crab on charter and private recreational boats. These counts of crab, and the corresponding estimate of total recreational ocean crab catch, were included in the same sampling project that is used to estimate recreational ocean salmon and groundfish landings." (Introduction) Close