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Soil fertility investigations on soil solution composition and nutrition of sweet corn and onions

Creator:: McAndrew, David Wayne
Abstract:: Laboratory incubation studies and field studies with sweet corn and onions were undertaken to evaluate interactions of lime, phosphorus (P), and copper (Cu). Eight soils were incubated at a constant temperature of 21 °C with combinations of band placed monocalcium phosphate (MCP), ammonium sulfate (AmS), and copper sulfate pentahydrate (CSPH)...
Resource Type:: Dissertation
Full Text:: decreased P fertilizer requirements. A soil pH of 6 was adequate for sweet corn. Broadcast and banded P

An economic evaluation of wheat fertilization strategies in North Central Oregon

Creator:: Ahmed, Awadelkarim Hamid
Resource Type:: Dissertation
Full Text:: . Oregon State Cooperative Extension Service. 1976. "Fertilizer Guide for Winter Wheat (Non-irrigated

Evaluation and use of a soil mineralizable nitrogen test to determine the fertilizer nitrogen needs of winter wheat grown in western Oregon

Creator:: Baloch, Dost M.
Abstract:: The assessment of optimum nitrogen (N) fertilizer need for winter wheat (Triticum aestivum L.) is important for economic and environmental sustainability. A comprehensive understanding of fertilizer N requirement depends on estimation of the quantity of N needed by the crop versus that supplied by soil. The objectives of this study...
Resource Type:: Dissertation
Full Text:: Determine the Fertilizer Nitrogen Needs of Winter Wheat Grown in Western Oregon AN ABSTRACT OF THE THESIS

Effects of intercropping beans with maize on angular leaf spot and rust of beans

Creator:: Boudreau, Mark Alan, 1958-
Abstract:: Experiments were performed to determine the nature of maize influence on bean disease in additive-type intercrops. Overall effects of intercrops on angular leaf spot (caused by Phaeoisariopsis griseola) in Kenya indicated >23% reductions (P<0.05) in area under the disease progress curve (AUDPC) in two of three season-site combinations. Fertilization tended...
Resource Type:: Dissertation
Full Text:: (caused by Uromyces appendiculatus) due to intercropping was observed in Oregon in 1989 and 1990 in two

Nitrogen fertigation practices to optimize growth and yield of northern highbush blueberry (Vaccinium corymbosum L.)

Creator:: Vargas, Oscar L.
Abstract:: Northern highbush blueberry is a long-lived perennial crop that is well adapted to low soil pH conditions. The plants are often shallow rooted and absorb primarily the ammonium (NH₄) form of nitrogen (N) rather than nitrate-N (NO₃-N). Traditionally, commercial blueberry fields have been irrigated with overhead sprinklers and fertilized using...
Resource Type:: Dissertation
Full Text:: studies were conducted in western Oregon to compare fertigation to granular fertilizers and to develop

Nitrogen and dry matter relationships for winter wheats produced in western Oregon

Creator:: Locke, Kerry A.
Resource Type:: Dissertation
Full Text:: HRWW (OR 8313, 'Batum') and two SWWW ('Stephens', 'Dusty') grown in western Oregon with a N fertilizer

Sweet corn decline syndrome in Oregon's Willamette Valley

Creator:: Hoinacki, Elisabeth V.
Abstract:: For the past several years vegetable growers in Oregon's Willamette Valley have experienced reduced yields in their sweet corn plantings. We conducted studies to 1) describe the symptomology and etiology of the disease, 2) test a root rot rating system we developed to evaluate factors in the disease syndrome, and...
Resource Type:: Dissertation
Full Text:: 2.1. Development of root rot of sweet corn in four fields in Oregon in A) 1997 and three fields mB

The effects of nitrogen manipulations and hydrology on the establishment and competitive abilities of wetland prairie plant species (western Oregon)

Creator:: Davis, Kimberly J.
Abstract:: Many studies suggest that weedy plant species are most successful when soil nitrogen in abundant. Consequently, I used soil nitrogen manipulations to determine if altering nitrogen would affect the establishment of both weedy and native plant species in a western Oregon wetland prairie. In two studies, we added carbon amendments...
Resource Type:: Dissertation
Full Text:: Establishment and Compettive Abilities of Wetland Prairie Plant Species (Western Oregon) AN ABSTRACT OF THE

N fertilizer effects on soil solution Mn and Mn response of barley and oats

Creator:: Petrie, S. E.
Abstract:: A series of field experiments was established in 1978, 1979, and 1980 on Lower Klamath Lake where Mn deficiency of oats had been observed in previous years. The pH of the soils ranged from 7.6 to 8.3 and the organic matter content was between 17 and 19%. The objectives of...
Resource Type:: Dissertation
Full Text:: N Fertilizer Effects on Soil Solution Mn and Mn Response

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:: different crops on a variety of soils in the Willamette Valley of western Oregon. Nitrogen fertilizer

ScholarsArchive@OSU

Soil fertility investigations on soil solution composition and nutrition of sweet corn and onions

An economic evaluation of wheat fertilization strategies in North Central Oregon

Evaluation and use of a soil mineralizable nitrogen test to determine the fertilizer nitrogen needs of winter wheat grown in western Oregon

Effects of intercropping beans with maize on angular leaf spot and rust of beans

Nitrogen fertigation practices to optimize growth and yield of northern highbush blueberry (Vaccinium corymbosum L.)

Nitrogen and dry matter relationships for winter wheats produced in western Oregon

Sweet corn decline syndrome in Oregon's Willamette Valley

The effects of nitrogen manipulations and hydrology on the establishment and competitive abilities of wetland prairie plant species (western Oregon)

N fertilizer effects on soil solution Mn and Mn response of barley and oats

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

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