Index Catalog // ScholarsArchive@OSU

Corn (Zea mays L.) yields as influenced by nitrogen, row spacing and intercropped ryegrass (Lolium multiflorum)

Creator:: Wivutvongvana, Paibool
Abstract:: Two field corn experiments were conducted on a Woodburn silt loam soil near Corvallis, Oregon, in 1972-1973 to investigate the effects of certain soil management practices on the yield and performance of corn (Zea mays L.). Experiment I involved variables that included three corn row spacings (76, 114, and 152...
Resource Type:: Masters Thesis
Full Text:: matter corn yield of 17.6 m ton/ha obtained in the 76 cm spaced rows decreased by 16% as the row spacing

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Creator:: Burket, John Zimmerman
Abstract:: Nitrogen availability in agricultural soils from fertilizer, plant residue inputs, and soil organic matter has important implications beyond crop yield. Legume winter cover crops and one fourth the recommended N rate on sweet corn resulted in yields equivalent to those at the recommended rate in the Willamette Valley of western...
Resource Type:: Dissertation
Full Text:: fertilization. Soil Sci. Soc. Am. J. 57: 1034-1040. Campbell, C. A., K. E. Bowren, M. Schnitzer, R. P. Zentner

Evaluation of soil and plant analyses as components of a nitrogen monitoring program for silage corn

Creator:: Marx, Ernest S.
Resource Type:: Masters Thesis

Fertilizer nitrogen use efficiency by winter wheat in the Willamette Valley

Creator:: Kjelgren, Roger Keith
Abstract:: Efficiency of nitrogen fertilizer uptake by soft white winter wheat (Triticum aestivum L.) was measured over two cropping seasons across a range of soils and cropping histories in the Willamette Valley. Fate and potential losses of applied nitrogen were also assessed over a seventeen month period. In both cropping seasons,...
Resource Type:: Masters Thesis
Full Text:: (Hauck and Bremner, 1976). This meant quan- titatively accounting for all fertilizer N found in the

Impacts of Reduced Tillage and Disturbance on Soil Health and Microbial Community Dynamics in Grass Seed Cropping Systems

Creator:: Zamora, Cesar G.
Abstract:: In Oregon perennial and annual grass seed cropping systems conservation management practices and their impacts on soil health and soil microbial community is not well understood. There is strong motivation to employ conservation tillage and other conservation practices to curb atmospheric carbon levels and improve soil health. However, the few...
Resource Type:: Masters Thesis
Full Text:: soils with 0.02 M calcium chloride solution following the hot water method (Bingham, 1982) with

Nitrogen available to winter wheat as influenced by previous crop in a moist xeric environment

Creator:: Qureshi, Maqsood Hassan
Abstract:: Rotating wheat with other crops is a common practice in the Willamette Valley of western Oregon. Depending upon previous crop and soil type, current N fertilizer recommendations for wheat in the Willamette Valley vary widely. Excessive fertilizer poses environmental risk, whereas lower N inputs than required by the crop represent...
Resource Type:: Dissertation
Full Text:: . Fresenius' J. Anal. Chem. 338: 394- 398. Hauck, R. D., and J. M. Bremner. 1976. Use of tracers for soil and

Nitrogen mineralization from composted and fresh yard trimmings

Creator:: Nartea, Theresa J.
Resource Type:: Masters Thesis
Full Text:: from Composted and Fresh Yard Trimmings Abstract approved: Dan M. Sullivan In western Washington

Nitrogen mineralization from organic amendments during the second year following application

Creator:: Kusonwiriyawong, Charirat
Abstract:: Estimates of nitrogen (N) available from long-term application of organic amendments are required to balance N inputs with crop N requirements. Two studies were conducted to (1) determine N mineralized from organic amendments (manures and composts) during year 2 after application, and (2) compare plant-available N (PAN) determined via in...
Resource Type:: Masters Thesis
Full Text:: from Organic Amendments During the Second Year Following Application. Abstract approved: Dan M

Nitrogen release from granules of sulfur-coated urea

Creator:: Jarrell, Wesley M.
Abstract:: Sulfur-coated urea (SCU) is a slow release nitrogen fertilizer manufactured by the Tennessee Valley Authority. Urea granules are sprayed with molten sulfur, then holes in the sulfur coating are sealed with a layer of wax sealant. The sulfur coatings are mixtures of amorphous and crystalline allotropes of sulfur. Coating thickness...
Resource Type:: Dissertation
Full Text:: granules of SCU-31. The general form of the equation is mr = 1.0 B M exp(-k 3T). 4. Benzene treatments for

Role of a grass riparian zone in controlling the fate of nitrogen in a poorly drained agricultural landscape

Creator:: Davis, Jennifer H.
Abstract:: Riparian ecosystems, through their unique positions in the agricultural landscape, have the potential to mitigate nutrient loading to streams. This study was conducted to gain a better understanding of N cycling in a poorly drained Grass Riparian Zone (GRZ) and adjacent Perennial Ryegrass seed Field (PRF) in the Willamette Valley,...
Resource Type:: Dissertation
Full Text:: that was not processed in the PRF entered the GRZ, it was consumed within 6 m in shallow soil water

ScholarsArchive@OSU

Corn (Zea mays L.) yields as influenced by nitrogen, row spacing and intercropped ryegrass (Lolium multiflorum)

Cover crops and biochemical functional diversity in relation to nitrogen availability in soil

Evaluation of soil and plant analyses as components of a nitrogen monitoring program for silage corn

Fertilizer nitrogen use efficiency by winter wheat in the Willamette Valley

Impacts of Reduced Tillage and Disturbance on Soil Health and Microbial Community Dynamics in Grass Seed Cropping Systems

Nitrogen available to winter wheat as influenced by previous crop in a moist xeric environment

Nitrogen mineralization from composted and fresh yard trimmings

Nitrogen mineralization from organic amendments during the second year following application

Nitrogen release from granules of sulfur-coated urea

Role of a grass riparian zone in controlling the fate of nitrogen in a poorly drained agricultural landscape

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