"Solar Trenches" for Production of Warm-Season Vegetables (1981)
North Willamette Research and Extension Center (NWREC) report
Delbert Hemphill
OSU Dept. of Horticulture
Introduction
Vegetable production
Response of Vegetables to Cytex, a Cytokinin Preparation
The purpose of these experiments was to determine the effect of a commercial cytokinin preparation on yield and quality of several Willamette Valley horticultural crops. Atlantic and Pacific Research, Inc. manufactures a marine algae extract, containing 100 ppm kinetin, which has increased fruit and vegetable yields in several areas of the country and is registered for use on tomatoes. This product, Cytex, is stable and can be applied with standard spray equipment.
Methods
Lettuce Yields Affected by Transplanting and Direct Seeding
Lettuce is difficult to plant to stand, particularly in early spring and again during mid-summer periods of high soil temperature. Transplanting greenhouse-grown seedlings may offer the advantage of nearly ideal stands and even permit one extra crop during the growing season. Other possible advantages which may offset the cost of raising transplants include elimination of thinning equipment or labor, reduced herbicide use or cultivation, and production of a more uniform head of lettuce.
Methods
Sweet Corn Yield Affected by Timing of Nitrogen Application
Production of commercial nitrogen (N) fertilizers depends on fixing atmospheric N, a process which consumes natural gas. As world energy prices soar, the cost of fertilizer N must also increase, making efficient crop uptake of applied N ever more important. It may be possible to increase the efficiency of crop N utilization by splitting the total crop requirement among two or more applications. In some situations, application of the entire crop N requirement at one time may lead to significant losses to volatilization, leaching, or runoff.
Overwintering Cauliflower for Spring Harvest (1978-1979)
Brussels Sprouts Variety Trial (1980)
Research report from OSU's North Willamette Agricultural Research and Extension Center
Delbert Hemphill and N. Mansour
OSU Dept of Horticulture
Watermelon Variety Trial (1980)
Research report from OSU's North Willamette Agricultural Research and Extension Center
Delbert Hemphill
OSU Dept of Horticulture, NWREC
Muskmelon Variety Trial (1979)
Research report from OSU's North Willamette Agricultural Research and Extension Center
Delbert Hemphill
OSU Dept of Horticulture, NWREC
Cover Crop Nitrogen for Vegetable Crops (2003)
J. Burket, J. Sandeno, D. Hemphill, and R. Dick. 2003. Management of cover crops to supply N to subsequent summer vegetable crops in the Willamette Valley. Oregon State University Extension Publication Series # EM 8803-E. 8 pages
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Overwintering Onion Variety Trial, 1980-1981
The purpose of this experiment was to evaluate the performance of several Japanese onion cultivars in overwinter trials. The Willamette Valley appears to have a suitable climate for production of spring-harvested onions if bolting, disease, and weed control problems can be overcome. Previous experiments at the North Willamette Station have indicated that late August planting dates are superior to September planting dates for maximum yields. With a June harvest, this would allow double-cropping the onion ground.
Methods