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Browsing by Author "Hemphill, Delbert D."

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Browsing by Author "Hemphill, Delbert D."

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  • Cereal rye (Secale cereale L.) 
    Oregon State University. Extension Service; Sattell, Robert; Dick, Richard; Karow, Russell S.; Kaufman, Diane; Hemphill, Delbert D.; Luna, John; McGrath, Daniel M. (Daniel Morton) (Corvallis, Or. : Extension Service, Oregon State University, 1998-01)
    Cereal rye is an erect annual grass with greenish blue, flat blades and an extensive fibrous root system. It resembles wheat, but usually is taller (3–5 ft) and tillers less. Flowering is induced by 14 hours of ligh ...
  • Crimson clover (Trifolium incarnatum L.) 
    Oregon State University. Extension Service; Sattell, Robert; Dick, Richard; Hemphill, Delbert D.; Luna, John; McGrath, Daniel M. (Daniel Morton) (Corvallis, Or. : Extension Service, Oregon State University, 1998-01)
    Crimson clover may be used as a cover crop, green manure, pasture, or hay. It often is used as a winter annual cover crop in annual rotations. It has been used successfully in reduced-tillage farming systems, and i ...
  • Field pea (Pisum sativum L. or Pisum sativum L. ssp. arvense (L.) Poir. 
    Oregon State University. Extension Service; Sattell, Robert; Dick, Richard; Hemphill, Delbert D.; McGrath, Daniel M. (Daniel Morton) (Corvallis, Or. : Extension Service, Oregon State University, 1998-01)
    Field pea can be used as a cover crop, green manure, forage, hay, and silage. Hay is good quality, but pea is more succulent than vetches and more difficult to cure. Regrowth after mowing or grazing is poor.
  • Influence of nitrogen form ratio and calcium on greenhouse and field performance of water-melon 
    Lamb, Michael J. (1990-12-20)
    Watermelon (Citrullus lanatus (Thunb.) Matsum. & Nakai var. Crimson Sweet) was seeded in a commercial peat mix in multicell containers (72 cells-tray⁻¹, 40 cm³-cell⁻¹) in July 1989 and April 1990. In 1989, the medium ...
  • Irrigation and plant density effects on head rot and yield of broccoli 
    Ludy, Robin L. (1990-10-15)
    Effects of amount of applied water and frequency of irrigation on head rot and yield of three broccoli cultivars were evaluated in 1987 and 1988. Two irrigation frequencies were established with a line-source sprinkle ...
  • Lime Fertilizer Interactions Affecting Vegetable Crop Production 
    Hemphill, Delbert D.; Jackson, T. L. (Portland, Or. : 34th Annual NW Fertilizer Conference, 1983-07-12)
    Experiments at the North Willamette Experiment Station have evaluated response of vegetables to lime and other fertilizers since 1970. The soils are moderately acid (pH 5.4 to 5.6), high in P, and better drained than ...
  • Nitrogen scavenging : using cover crops to reduce nitrate leaching in western Oregon 
    Oregon State University. Extension Service; Sattell, Robert; Dick, Richard; Hemphill, Delbert D.; Selker, John S.; Brandi-Dohrn, Florian M.; Minchew, Hudson; Hess, Marlo; Sandeno, Joan; Kaufman, Susan M. (Corvallis, Or. : Extension Service, Oregon State University, 1999-10)
    Willamette Valley field trials have shown that properly managed cover crops can reduce the amount of nitrate (NO3-)
  • North Willamette Agricultural Experiment Station vegetable research - 1978 
    Hemphill, Delbert D.; Oregon State University. Agricultural Experiment Station; North Willamette Agricultural Experiment Station (Corvallis, Or. : Agricultural Experiment Station, Oregon State University, 1979-04)
  • Oregon vegetable digest ; Vol. 29 No. 4 
    Oregon State University. Agricultural Experiment Station; Mack, H. J.; Baggett, James R.; Koepsell, P. A.; Hemphill, Delbert D.; Mansour, N. S. (Corvallis, Or. : Agricultural Experiment Station, Oregon State University, 1980-10)
  • Overwintering cole crops and spinach in the Willamette Valley 
    Hemphill, Delbert D.; Oregon State University. Agricultural Experiment Station (Corvallis, [Or.] : Agricultural Experiment Station, Oregon State University, 1986-04)
  • Overwintering onions and other alliums in the Willamette Valley 
    Hemphill, Delbert D.; Oregon State University. Agricultural Experiment Station (Corvallis, Or. : Agricultural Experiment Station, Oregon State University, 1987-02)
  • Red clover (Trifolium pratense) 
    Oregon State University. Extension Service; Sattell, Robert; Dick, Richard; Hemphill, Delbert D.; McGrath, Daniel M. (Daniel Morton) (Corvallis, Or. : Extension Service, Oregon State University, 1998-01)
    Red clover is used successfully in Oregon as a fall-planted cover crop and green manure in rotations with vegetable crops.
  • Seedless table grapes for the Willamette Valley 
    Hemphill, Delbert D.; Sheets, W. A. (Willis Arden); Martin, Lloyd W.; Oregon State University. Agricultural Experiment Station ([Corvallis, Or.] : Agricultural Experiment Station, Oregon State University, 1992-04)
  • Subterranean clovers (Trifolium subterraneum) 
    Oregon State University. Extension Service; Sattell, Robert; Dick, Richard; Hemphill, Delbert D.; McGrath, Daniel M. (Daniel Morton) (Corvallis, Or. : Extension Service, Oregon State University, 1998-01)
    Subclovers are used for forage and hay and have been used successfully in Oregon as fall-planted and relay interplanted cover crops in annual rotations. They are capable of accumulating substantial amounts of N, a ...

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