Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 33 for “"soil analysis"”.
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Multi-ISFET sensor system for soil analysis
… dependent on field mapping of the variations in soil and crop parameters. The development of soil nutrient sensors may both improve the accuracy of soil nutrient maps and decrease the cost of soil sampling.
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Forensic Soil Analysis: Characterization of the Sand Fraction
… analytical method for the characterization of soil by examining particle size, elemental composition, and percent organic matter in soil, and to determine its forensic applicability. In this study, five soils of varying geological locations were examined including two samples from Kentucky; two …
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Relation of tissue analysis to soil analysis in Michigan orchards
Thesis (M.S.)--Michigan State College of Agriculture and Applied Science. Dept. of Horticulture, 1951
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The potential of an extended Kalman filter for soil analysis in conjunction with a 3D-var system in a limited area NWP model
… the atmosphere. The fluxes are regulated by the soil temperature and soil moisture content, that regulate the partitioning in sensible and latent heat flux. To initialise the surface, data assimilation techniques can be used. Those techniques combine observations with model data to estimate the …
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Development of geochemical identification and discrimination by Raman spectroscopy. The development of Raman spectroscopic methods for application to whole soil analysis and the separation of volcanic ashes for tephrachronology
… investigation and in period dating. Forensic soil samples have been traditionally analysed via examinations of colour, texture and mineral content by physical or chemical methods. However, these methods leave any organic or water-soluble fractions unexamined. Tephrochronology (the dating of …
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Fire and periodical cicadas: impacts on soil nutrients and understory plant germination
… This study investigated the collective impact on soil composition and seed germination.</p> <p><strong>Methods </strong></p> <p>Through the soil analysis of cicada turrets, burned soil, and unburned soil, we hope to understand the composition of each soil type. Additionally, a 2 x 2 factorial …
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SUBSURFACE DRIP IRRIGATION AND UREA PHOSPHATE USE IN VEGETABLES ON CALCAREOUS SOILS.
… lines placed 15 cm deep or 5 cm shallow below soil surface and furrow irrigation were compared on calcareous soils of southern Arizona. Crops grown were zucchini squash (Cucurbita pepo L.) 1982 and 1983 summers, and cabbage (Brassica oleracea var. capitata L.), 1982 fall. Furrows received a …
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Groundwater effects of land applied alum residuals
Soil columns of predominantly Peawick and Slagle soils had various amounts of alum residuals, lime and plant nutrients incorporated into the topsoil. A weekly dose of rainwater was applied to each column over a six month period. Leachate and soil constituents were analyzed to evaluate migration of …
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Interpreting site formation processes affecting re-emergent cultural sites within reservoirs: A case study of St. Thomas, Nevada
… structural features. Field investigation, soil analysis, X-ray diffraction, examination of historic gauge records and aerial imagery indicates that St. Thomas, and perhaps other cultural sites located within the down-draw boundary of reservoirs, are susceptible to severe degradation from …
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Evaluation of seed and seedling response to aid revegetation of hazardous chemical waste sites
… plant species to heavy metal contaminated soils was evaluated using plant bioassays with a soil substrate. A natural soil was collected from Dinwiddie County, Virginia and soil analysis was performed. The plant species, Lolium multiflorum, setaria italica and Trifolium rep ens latum, …
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Hydraulic properties of asphalt concrete
… flow models and laboratory methods common to soil analysis, to characterize the hydraulic properties of asphalt concrete. Wetting and drying water characteristic curves were measured for six asphalt concrete cores. From the water characteristic curves, it is proposed that asphalt concrete may …
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Approaches to wildflower meadow establishment
… of the native mix in the fall was investigated. Soil analysis and subsequent development of the Virginia wildflower mix failed to differentiate any soil quality influence of the nurse crop as compared to the other two treatments. Direct seeding was compared to the use of the Virginia Tech …
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Evaluating Changes in Terrestrial Hydrological Components Due to Climate Change in the Chesapeake Bay Watershed
… Surface Energy Balance (SSEBop) Model and soil moisture from Soil Analysis Climate Network (SCAN). Six best performing Global Climate Models (GCM) based on Multivariate Adaptive Constructed Analogs (MACA) scheme are included for two future scenarios (RCP 4.5 and RCP 8.5), to assess the …
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Management of Alum-Treated Poultry Litter
… or exchangeable Aluminum (Al) content in treated soils. Two, 3-yr field trials with corn (Zea mays L.) were used to show that, when applied at rates based on current litter management strategies, ATPL resulted in yields similar to those achieved through applications of non-treated poultry litter …
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Cotton Yield as Related to Selected Physical and Chemical Properties of Soils of the Coastal Plain of Virginia and North Carolina
… in Virginia and North Carolina, respectively. Soil physical and chemical properties may limit cotton yields. The objective of this study was to; 1) determine influences of soil physical and chemical properties on yield, 2) validate existing preharvest yield estimators, and 3) determine the …
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Environmental Fate of Animal Manure-associated Antibiotics and Seed-coated Pesticide in Soils
… method for quantification of pirlimycin (PLY) in soils to be used in field research and determine the ability of second-generation neonicotinoids to move through soil when applied as a seed coating using a greenhouse study. Liquid-solid extraction of PLY from soil using (1:6, v/v) ammonium …
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Impact of mine pollution of composition, diversity and structure of plant and ground-dwelling invertebrate communities around Kombat mine tailing dump, Namibia
… marked at 50m intervals along each transect. Top soils in the demarcated plots were sampled and analysed for concentrations of heavy metals and total sulphur. Woody plant species were identified, counted and heights measured. Herbaceous plants were identified and the cover was visually estimated. …
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Pressurized Hot Water: An Alternative Method of Nutrient Extraction and Subsequent Analysis for Use in Small-Scale Agriculture
Soil analysis for small acreage farms in developing countries is often inconvenient and prohibitively expensive using current procedures, yet the information gained from these soil tests could have economical and environmental benefits. The pressurized hot-water (PHW) extraction coupled with …
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Quaternary glaciation in the Pindus Mountains, Northwest Greece
… has been established through sedimentological analysis, soil analysis and Uranium-series dating. Four glacial events are recorded in the sedimentological and geomorphological records. The more extensive recorded glaciation pre-dates 350,000 years BP and was characterised by extensive valley …
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