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- Browsing Theses, Dissertations and Student Research Papers (Crop & Soil Science) by Issue Date
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Browsing Theses, Dissertations and Student Research Papers (Crop & Soil Science) by Issue Date
Now showing items 1-20 of 233
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(1971-09-01)There are two major problems associated with soil acidity and lime response investigations: A. Determining how much lime (100% "available" CaCO₃ equivalent) is required to raise a soil pH (or degree of acidity) from i ...
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(1973-05-03)Genetic differences, extent of hybrid vigor, nature of gene action, heritability estimates, and associations among characteristics, and between progenies and their respective mid-parents were determined for seed and p ...
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(1977-06-10)The Federal Water Pollution Control Act Amendments of 1972 prohibits the discharge of seafood processing solid wastes into navigable waters after July 1, 1977. Oregon shrimp and crab processors must use other methods ...
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(1980-09-30)The effects of broadcast gypsum on infiltration rates, crusting, aggregate stability, and runoff and sediment yields were analyzed during the winter months on three West Oregon soils. The results were used to evaluate ...
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(1981-02-16)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 ...
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(1982-08-20)A study was conducted to evaluate the properties of soils in the fog belt area of the Oregon Coast Range. Soils in the study were chosen to include only those belonging to Andepts or to andic subgroups. Samples were c ...
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(1990-04-02)Forest soils with low bulk densities are often considered less susceptible to compaction than soils with higher bulk densities. The objective of this study was to determine if soil strength controlled the compression ...
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(1990-06-08)
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(1990-07-09)Prevention of groundwater contamination by agricultural chemicals requires an understanding of the complex processes that control pesticide movement below the soil surface. Through this understanding it is possible to ...
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(1990-07-31)Meadowfoam (cultivar Mermaid) is an entomophilous winter annual oilseed crop that has historically produced an average of only two of five seeds per flower. Reference to inadequate meadowfoam pollination exists in the ...
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(1990-08-22)The continuum theory provides a framework in which the growth of a plant root as a dynamic process involving interactions among transport of water and solute, cell division, and the subsequent cell elongation can be d ...
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(1990-09-27)Gaseous transport through soil in the presence of soil microorganisms has been investigated. More recently, modeling of gaseous transport in the unsaturated zone has been investigated. However, the problem of mathemat ...
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(1990-11-13)Cuphea is an herbaceous genus having species whose seed storage lipids are predominantly medium-chain triglycerides (MCTs). Cuphea lanceolate Ait, and Cuphea viscosissima Jacq. are central to the breeding of Cuphea as ...
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(1990-11-29)A negative relation between grain protein content and grain yield is frequently observed in wheat (Triticum aestivum L. em Thell) i.e. as grain yield increases, grain protein decreases. It has been suggested that the ...
Now showing items 1-20 of 233
