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Physiological effects of water stress on young corn plants

Creator:: Barlow, Edward William Ross
Abstract:: Laboratory experiments were used to investigate the mechanism of plant response to water stress by determining the sensitivity of leaf elongation, photosynthesis and transpiration in young corn plants to a decrease in leaf water potential. In initial experiments, 9 day old corn plants were grown at soil water potentials of...
Resource Type:: Dissertation
Full Text:: experiments were used to investigate the mechanism of plant response to water stress by determining the

Water injection into the seed zone as an aid to emergence of dryland cereals

Creator:: Estes, James Patrick
Abstract:: 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...
Resource Type:: Masters Thesis
Full Text:: relationship of seed water content, diffusivity and hydraulic conductivity with the seed water potential of

Summer soil moisture dynamics in a young Douglas-fir plantation as influenced by three herbaceous weed communities

Creator:: Preest, David Stanley
Abstract:: The use of chemicals such as the triazines (especially atrazine) and mixtures of the triazines and 2,4-D or 2,4,5-T has become almost standard practice in some parts of the world for selectively controlling grasses and other herbaceous weeds to conserve moisture for and/or prevent the smothering of newly-planted conifers. In...
Resource Type:: Masters Thesis

Leaf stress in corn, beans, and tomatoes under optimum soil moisture conditions

Creator:: Nilsson, Colin Wayne
Abstract:: Under adverse soil moisture conditions a critical water stress or water potential develops in the plant and productivity is reduced, or in extreme cases, terminated. Research to determine the soil moisture status for maximum production of specific crops has been conducted for decades. The results have done much to increase...
Resource Type:: Masters Thesis
Full Text:: . Limited research in controlled environments has been conducted, but actual plant water stress levels

Measurement and interpretation of physical properties of soils

Creator:: Nagpal, Narender Kumar, 1942-
Abstract:: One of many important physical properties that must be known to understand transport phenomena in soils is pore size distribution. Presently the pore size distributions of soils are most commonly obtained from soil water characteristic curves. The soil water characteristic curves are usually obtained by the pressure plate technique. It...
Resource Type:: Dissertation
Full Text:: regulators of soil-plant-water relationships. Rates of biological and chemical reactions and hence rates of

Comparative study of some soil characteristics of grassland and forest/grassland transition in western Oregon

Creator:: Ezenwa, Matthew Ikechuku Sunday
Abstract:: Vegetation as a soil-forming factor was studied under forest transition and grass while attempting to keep other soil forming factors constant in the western part of the Willamette Valley, Oregon. The physiographic units consist chiefly of the interior foothills and slopes formed from an old basaltic flow with some interspersed...
Resource Type:: Masters Thesis
Full Text:: impact on the soils. The soil parameters that are affected by the plant cover are directly or indirectly

Growth and nutrient content of Chamaecyparis lawsoniana seedlings from contrasting soils in Coos County, Oregon

Creator:: Plocher, Milton David
Resource Type:: Masters Thesis
Full Text:: for the degree of. MASTER OF SCIENCE in Botany and Plant Pathology presented on September 28, 1976

Diurnal dimensional fluctuation in a Douglas-fir stem in response to tree water status and certain environmental factors

Creator:: Lassoie, J. P., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: Diurnal changes in stem circumference at the 1954 and 1963 internodes of a 22-year-old Douglas-fir were monitored using automated band dendrometers. Determinations of internal tree water potential and estimates of transpiration were used to characterize the water status of the tree. Environmental monitoring included the measurement of air temperature along...
Resource Type:: Technical Report
Full Text:: Transpiration produces an internal energy gradient that results in water movement through the entire plant

Snow damage to young Western hemlock and Douglas-fir

Creator:: Kangur, Rudolf and Oregon State University. Forest Research Laboratory
Abstract:: Data collected from permanent sample plots at medium and high elevations in Oregon's coastal forest clearly indicate that snow damage adversely influences stand development. Sapling stands of western hemlock and Douglas-fir were subjected to severe snow damage above 1,000 feet in the early parts of 1965 and 1966 and above...
Resource Type:: Technical Report
Full Text:: Forstzeitschr. 11. Nohara, Y. et al. "Studies on Snow Resistance of Cryptomeria Varieties. I. Relationship

Modeling water uptake on coniferous forest Oregon watershed 10 synthesis

Creator:: Waring, Richard H., Running, S. W., Holbo, Harold Richard, Kline, J. R., U.S. International Biological Program. Coniferous Forest Biome, and University of Washington
Abstract:: In the Coniferous Forest Biome, many of the understory as well as dominant plants are evergreen and thus water uptake is a year around process. The flow of water from the soil through plants to the atmosphere affects the entire forest ecosystem. As water is evaporated, it absorbs heat and...
Resource Type:: Technical Report
Full Text:: equation is simply PMS = 30 -140* AWF. An example of the relationship coupling root zone water to plant

ScholarsArchive@OSU

Physiological effects of water stress on young corn plants

Water injection into the seed zone as an aid to emergence of dryland cereals

Summer soil moisture dynamics in a young Douglas-fir plantation as influenced by three herbaceous weed communities

Leaf stress in corn, beans, and tomatoes under optimum soil moisture conditions

Measurement and interpretation of physical properties of soils

Comparative study of some soil characteristics of grassland and forest/grassland transition in western Oregon

Growth and nutrient content of Chamaecyparis lawsoniana seedlings from contrasting soils in Coos County, Oregon

Diurnal dimensional fluctuation in a Douglas-fir stem in response to tree water status and certain environmental factors

Snow damage to young Western hemlock and Douglas-fir

Modeling water uptake on coniferous forest Oregon watershed 10 synthesis

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