The effect of different soil moisture levels on the amount and
location of NO₃ -N accumulation in the soil profile were studied.
The cultivars used in this study were Mcdermid, a soft white
winter wheat, and Hudson, a medium early winter barley.
Moisture treatments simulating dry, normal and wet fallow...
The effects of different fallow moisture levels and tillage
systems on the amount of nitrate-nitrogen accumulation in the 0-30 cm
soil profile were studied.
Fallow moisture treatments simulating typical dry, normal and
wet precipitation cycles were established on trial plots.
Data were obtained for nitrate-nitrogen, soil moisture and
Two winter wheat (Triticum aestivum L. em Thell) and two
winter barley (Hordeum vulgare L. em Thell) cultivars were grown
with and without straw mulch utilizing six different planting dates.
Soil temperature was recorded continuously at seeding depth from
planting date through March of the crop year. A series of...
An adequate stand at the optimum time is an important factor
affecting potential yield and soil erosion control. However, obtaining
adequate stands of fall planted winter wheat in the dryland areas of the
Pacific Northwest is often complicated by marginal seed zone soil
moisture. The purpose of this laboratory study...
Rate of emergence is an important character for stand
establishment. Ability of wheat seeds to germinate and
emerge rapidly under different climatic conditions may be
regulated by physical and/or physiological characteristics.
Seeds of 26 wheat varieties representing five classes
were produced in two different environments (Moro and Corvallis,
The effect of four basic liquid fertilizers: Solution 32, 10-34-0-.9, Thio-Sul, and Potash solution; and one commercial liquid fertilizer, Feast 9-18-9, on germination, emergence, and seedling growth of wheat (Triticum aestivum L.) were evaluated under laboratory, greenhouse, and field conditions. Experiments included: 1) preliminary study of basic fertilizer sources to...
The semi-arid regions of the Pacific Northwest are
characterized by a high degree of annual temperature and
precipitation variation. As a result of this climatic
variation, dryland nitrogen fertilizer trials on fallow-
,wheat rotations typically demonstrate a variable response.
Wheat growers in the area must not only cope with this...
No-tillage winter wheat (Triticum aestivum L.) grown in a
wheat-fallow cropping system has consistently produced lower grain
yields than conventionally tilled soils in the semiarid Pacific
Northwest. A 2-year study was conducted in a long-term tillage trial
at Moro, OR to determine factors responsible for differences in wheat
Dryland winter wheat in eastern Oregon is usually subjected to
water stress several times during the growing period. Moreover, the
last three months of growth period depend strongly on the available
soil water. The fertility level, stage of growth, availability of
soil water and climatic conditions all interact to determine...
Five newly released and two Eastern European winter wheat
cultivars were grown under five different seeding rates (80, 160,
240, 320, 400 seeds per m²). Four of these newly released cultivars
were grown at three different locations which have different environmental
conditions. Data were obtained on grain yield, tiller number...