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Dissertations / Theses on the topic 'Soil geography'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Sourlamtas, Konstantinos. "Soil Erosion estimation for the Göta Älv river using remote sensing, GIS and the Revised Universal Soil Loss Equation (RUSLE) model." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-175412.

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According to previous studies, the study area of Göta Älv river has high risk of landslides along the river banks due to the water flow. Soil erosion can affect the increase of the landslides in an area with unstable soils caused by the increase rainfall. The Swedish climate is getting more vulnerable thus there is a potential increased risk in erosion and landslides due to unpredictable rainfall intensity. This study aims to calculate soil erosion for the Göta Älv river using the Revised Universal Soil Loss Equation (RUSLE) where a comparison of data from remote sensing and meteorological and

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2

Jones, Hafwen M. "Contemporary soil erosion and the potential destruction of archaeological sites." Thesis, University of Exeter, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288022.

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3

Littell, Ashley. "Spatio-Temporal Analysis of Observed Soil Moisture from Nebraska." TopSCHOLAR®, 2007. http://digitalcommons.wku.edu/theses/402.

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Soil moisture is a measure of the water content in a soil that is dependent upon precipitation, evapotranspiration, runoff, drainage, and irrigation. Nebraska is one of the few states that measures soil moisture in an extensive network that records weather variables on a daily basis. Daily soil moisture observations are collected from depths of 10, 25, 50, and 100 centimeters and analyzed in this research. Data from these stations are evaluated on the spatial and temporal scales using spatial interpolations, time-series analysis, and cross-correlations to better understand the variations of so

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4

Kawa, Ibrahim Hussein. "The Dodoma Region Soil Conservation Project (HADO), Tanzania : is it institutionally sustainable?" Thesis, University of East Anglia, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357243.

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5

Omwega, Asenath Kwamboka. "Crop cover, rainfall energy and soil erosion in Githunguri (Kiambu district), Kenya." Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.257360.

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6

Kadiri, Margaret. "Physicochemical changes to soil and sediment in managed realignment sites following tidal inundation." Thesis, Queen Mary, University of London, 2010. http://qmro.qmul.ac.uk/xmlui/handle/123456789/575.

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The recognition of the value of salt marshes and concerns over salt marsh loss has led to the adoption of managed realignment in coastal areas. Managed realignment involves the landward relocation of the seawall, allowing an area of agricultural land to be tidally inundated. It is believed that managed realignment sites can act as a sink for contaminants. However, these sites may also act as a contaminant source and pose a risk to estuarine biota. In this thesis, the potential for metal and herbicide release from agricultural soil and dredged sediment in managed realignment sites was investiga

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7

Siewert, Matthias. "High-resolution mapping of soil organic carbon storage and soil properties in Siberian periglacial terrain." Licentiate thesis, Stockholms universitet, Institutionen för naturgeografi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-120275.

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In the past years considerable attention has been given to soil organic carbon (SOC) stored in permafrost-affected soils in periglacial terrain. Studies have shown that these soils store around half the global SOC pool, making them a key component of the global carbon cycle. Much of the SOC presently stored in these soils has accumulated since the Pleistocene and is protected from decomposition and erosion by low temperatures close to or below the freezing point. This makes it vulnerable to remobilization under a warming climate. This thesis provides new data on SOC storage in three study area

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8

Hemlin, Söderberg Maja. "Measuring soil infiltrationrates in cultivated land : A case study of Ifakara, Tanzania." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-120250.

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An increased global food demand requires an increase in agricultural land use, which in turn affects the hydrologic cycle. A central process in this regard is infiltration of rainfall through the land surface. While there are standard values available for different soil types, land cover also has a documented influence on infiltration rates. This makes infiltration highly variable acrosss patiotemporal scales and as such, difficult to measure in field, thus selection of an appropriate measurement technique is important to consider. Therefore, this study aimed to establish a method for robust i

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9

Dick, Henry C. "The detection of forensic and archaeological burials using geophysics and soil analysis." Thesis, Keele University, 2017. http://eprints.keele.ac.uk/4361/.

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Graveyards and cemeteries around the world are increasingly being designated as full. There is growing requirements to identify burial space or to exhume and re-inter if necessary. Near-surface geophysical methods offer a potentially non-invasive target detection solution, with additional soil sampling analysis to provide ground truth information; however there has been lack of research to identify optimal detection methods. This study has collected multi-frequency (225 MHz – 900 MHz) ground penetrating radar, electrical resistivity, electromagnetic induction and magnetic susceptibility surfac

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10

Ibrahim, Norkhair. "An analysis of the sensitivity of soil erosion models within a geographical information system." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243472.

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11

Dong, Jingnuo. "Evaluating new approaches to measure and map soil moisture spatial variability." Thesis, Oklahoma State University, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1542171.

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<p> Knowledge of soil moisture spatial patterns provides basic but important information in studies of hydrological processes. At the field to subwatershed scale, soil moisture spatial variability is critical to aid in hydrologic modeling, but has not been adequately studied. Two new approaches were taken to contribute to the study of soil moisture spatial variability at this scale. The Bayesian Maximum Entropy (BME) framework is a more general method than classical geostatistics and has not yet been applied to soil moisture spatial estimation. The recently developed mobile Cosmic-ray Soil Moi

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12

Ouellet, Genevieve. "Towards regionally-based indicators of soil infiltrability: Eastern Ontario, Canada." Thesis, University of Ottawa (Canada), 2007. http://hdl.handle.net/10393/27544.

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Macropore flow is a gravity-driven phenomenon that exhibits high contamination risk for surface and shallow groundwater. In order to address the necessity of having reliable and tangible indicators of macropore flow incidence, this research is an extensive data exploration that uncovers potential regional macropore flow incidence indicators that are synthesized as hypotheses for future research. CART-based regression trees are used to uncover significant relationships among soil physical properties, management regimes, field saturated hydraulic conductivity, saturated soil air-entry tensions a

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13

Zhang, Ning. "Soil Moisture Mapping in South Central United States by Blending In-situ, Modeled and Remote Sensing Data." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1584465849013608.

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14

Phillips, Clive P. "Soil erosion, land use and land reclamation within the badland environments of central and southern Italy : an assessment of the influence of land use on soil erodibility and on the stability of modelled land." Thesis, University of Sussex, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363372.

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15

Khaba, Liphapang. "Modelling soil erosion and sediment transport of the Nqoe River Catchment at 'Muela." Thesis, University of Nottingham, 2018. http://eprints.nottingham.ac.uk/55289/.

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This study assesses the dynamics of soil loss rates of the Nqoe River Catchment. The assessment is made by numerical modeling of the stream water levels and flow, as well as the suspended and bed-load sediment. Literature states that accelerated soil erosion is a problem in the catchment, resulting in high rates of sedimentation of the 'Muela Reservoir. This erosion is blamed on the over-stocking of rangelands which leads to overgrazing and development of bare soil cover. As part of literature review, to better understand existing methods for estimation of soil erosion and stream sediment tran

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16

Machfudh, Ir. "The Role of Landscape Structures and Their Cumulative Impacts on Spatio Dynamic of Soil Phosphorus /." The Ohio State University, 1996. http://rave.ohiolink.edu/etdc/view?acc_num=osu148793235105738.

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17

Couture, Nicole. "Fluxes of soil organic carbon from eroding permafrost coasts, Canadian Beaufort Sea." Thesis, McGill University, 2010. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=92229.

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Resolving uncertainties about the cycling of organic carbon in the world's oceans is particularly crucial in the Arctic because it is the locus of deep water formation, as well as rapid environmental change. The specific goal of this thesis was to quantify the flux of soil organic carbon (SOC) to the Arctic Ocean due to erosion along the Yukon Coastal Plain. Ground ice and SOC within coastal sediments, and the current and future fluxes of carbon were examined in detail.<br>An evaluation of the volume of ground ice showed it to be a significant constituent of coastal bluffs. The amount of it

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18

Llewellyn, Gary Michael. "Remote sensing of grassland with contaminated soil using the spectral red-edge." Thesis, University of Southampton, 2009. https://eprints.soton.ac.uk/160117/.

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In most cases contaminants are concealed in soil and under vegetation and therefore can not be measured directly by remote sensing. However, soil contaminants were detected using the spectral red-edge to indicate vegetation stress caused by the presence of the contaminants. An improved red-edge position (REP) was developed and gave a slight improvement in the predictive capability over existing indices and an effective additional diagnostic indicator of soil contamination was found to be the spatial pattern of the REP. Where an area had high levels of hydrocarbon in the soil it also had a high

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19

Wade, Rebecca Jane. "A quantitative study of waterborne soil erosion on arable land in eastern Scotland : towards erosion prediction." Thesis, University of Dundee, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.244481.

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20

Miltner, Benjamin. "Biochar soil management in traditional Amazonion agriculture: charcoal production and kiln site cultivation in Peru." Thesis, McGill University, 2013. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=119462.

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A growing body of literature suggests biochar can ameliorate soil conditions and shows considerable potential as an affordable soil management tool to increase productivity and promote sustainable agriculture in the tropics—yet research on the use and promise of biochar for peasant farmers remains limited. This thesis addresses this gap in the literature through a case study from the Peruvian Amazon of indigenous biochar soil management that has evolved at the nexus of commercial charcoal production and swidden-fallow agroforestry. Charcoal is produced in the study community using earthmound k

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21

Freund, Stephanie M. "Biological Soil Crust Cover and Richness in Two Great Basin Vegetation Zones." Thesis, University of Nevada, Reno, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10001568.

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<p> Biological soil crusts are communities of bacteria, microfungi, algae, lichens, and/or bryophytes that colonize the surfaces of soils where other vegetation is sparse. Soil crust communities are best known from the world’s arid and semiarid regions, including North America’s hot and cool deserts, where they aid in soil stabilization and aggregation, reduce erosion, and contribute to nutrient inputs in the soil. Although a significant body of work has emerged on soil crust function in arid and semiarid environments, there is still much to be learned about their geographical dist

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22

Zhao, Chen. "Impact of Initial Soil Moisture on the Accuracy of Runoff Simulation." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586279717062136.

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23

Branson, Julia. "Soil erosion and transport by needle ice : a laboratory investigation." Thesis, University of Birmingham, 1993. http://etheses.bham.ac.uk//id/eprint/5410/.

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A series of detailed laboratory experiments have been carried out to investigate the processes of needle-ice growth and the mechanisms by which needle ice incorporates and transports sediment. The use of laboratory techniques has made it possible to control and monitor the environmental conditions at the soil surface closely, and thus isolate the elements that are important for needle ice growth. Two types of fine-grained soil sample were used: disturbed (remoulded) and undisturbed. These were taken from sites where needle ice was seen to grow naturally. Remoulding the soil sample affected the

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24

Yu, Olivia. "Soil carbon in a grazed and ungrazed tidal marsh in the St. Lawrence Estuary." Thesis, McGill University, 2009. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=32570.

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Soil carbon storage is an important ecosystem service of tidal salt marshes, but is this service maintained under an agricultural use? Sheep grazing on Quebec's Île Verte, in the upper estuary of the St. Lawrence River, provided an opportunity to examine whether seven summers of grazing negatively affected soil carbon storage in high latitude tidal salt marshes. I compared plant biomass and soil properties in grazed and ungrazed sections. Above- and below-ground production was assessed through plant litte

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25

Kerr, Richard. "Mapping Impacts of Prior Land Use on Soil Phosphorus in Lebanon, New Hampshire." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1290788504.

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26

Park, Soojin. "Modelling soil-landform continuum on a three-dimensional hillslope." Thesis, University of Oxford, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670238.

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27

Al-Qahtani, Marei Hussain. "An assessment of the relationships between the surface soil properties and components of slope and vegetation in the Upper Wadi Bishah Basin, Saudi Arabia." Thesis, University of Hull, 1998. http://hydra.hull.ac.uk/resources/hull:7005.

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This study, the first of its kind undertaken in Saudi Arabia, investigates and evaluates the condition of soil and vegetation and the relationship between them, as well as their relationship with slope components in the Upper Wadi Bishah basin, south-west Saudi Arabia. It is based mainly on quantitative and laboratory analysis, and provides a scientific basis for exploitation of the basin's slopes and conservation of its soil and vegetation. The findings reveal that floristic diversity of the research area is low. Only 62 perennial species belonging to 49 genera and 28 families were recorded i

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28

Anders, Irene Julia. "Evaluation of the soil cover reclamation method for chemically contaminated land." Thesis, Liverpool John Moores University, 1989. http://researchonline.ljmu.ac.uk/4894/.

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29

Lee, Khil-Ha. "Effect of vegetation characteristics on near soil moisture retrieval using microwave remote sensing technique." Diss., The University of Arizona, 2002. http://hdl.handle.net/10150/280028.

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Passive microwave remote sensing has shown potential for monitoring near surface soil moisture. This dissertation presents a new approach to representing the effect of vegetation on microwave emission by extending an existing model (Wilheit, 1978) of the coherent propagation of electromagnetic radiation through a stratified medium. The resulting multi-layer microwave emission model is plausibly realistic in that it captures the behavior of the vegetation canopy by considering the dielectric permittivity of the mixture of air and vegetation matter in the canopy and recognizing the vertical dist

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30

Ozacar, Biricik Gozde. "Impacts of urbanization on flood and soil erosion hazards in Istanbul, Turkey." Thesis, The University of Arizona, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3603219.

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<p> Due to the inappropriate planning and explosive population growth in urban areas, especially in developing countries, sustainable and disaster-safe urbanization has become the most important challenge for governments. Urbanization presents benefits in different ways but has led simultaneously to changes in land use/land cover (LULC), impacting soil quality, runoff, surface temperature, water quality, and promoting climate change. The environmental implications of LULC changes cannot be understood well enough to take precautions without the knowledge of LULC change. This reality is the dr

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31

Chohaney, Michael L. "Secrets Beneath the Soil: A Mixed Methods Necrogeographic Investigation of Romany (“Gypsy”) Memorial Sites." University of Toledo / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1333732232.

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32

Goldsmith, Kevin. "Artificial intelligence techniques for soil erosion mapping and risk assessment in Almeria Province, Southeast Spain." Thesis, Kingston University, 2005. http://eprints.kingston.ac.uk/20367/.

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This thesis provides an alternative method to for mapping soil erosion. The method is conducted in a small study area of 40 km2 in the Sorbas Basin, Almería province, Southeast Spain. Soil erosion is one of the most destructive land degradation processes and can often lead to serious environmental problems. It is important to implement appropriate management strategies to meet these challenges at a range of scales. However, prior knowledge of erosion processes and the extent to which they operate spatially is often limited and, traditional methods of soil erosion mapping are often time and lab

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33

Wilkes, Graham A. "Utilizing geographic information systems (GIS) for the modeling of warm season soil loss in eastern Ontario, Canada." Thesis, University of Ottawa (Canada), 2004. http://hdl.handle.net/10393/26809.

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Soil loss in eastern Ontario is of great concern. The objective of this study is to map soil loss risk in Eastern Ontario for 2001. The universal soil loss equation (LISLE), the universal soil loss equation 2 dimensions (USLE2D), and the unit stream power erosion deposition (LISPED) models are applied within a Geographic Information System (GIS) to calculate soil loss within agricultural fields. Hourly precipitation, soil survey, digital elevation, field boundary, and satellite imagery data are main inputs used to generate model parameters at non-depositional areas. These datasets are integrat

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34

Verbrugge, Lydia. "Depth of soil in the Goss-Gasconade rock outcrop complex in Callaway County, Missouri, using the Soil Land Inference Model (SoLIM) a thesis presented to the Department of Geology and Geography in candidacy for the degree of Master of Science /." Diss., Maryville, Mo. : Northwest Missouri State University, 2006. http://www.nwmissouri.edu/library/theses/VerBruggeLydia/index.htm.

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Thesis (M.S.)--Northwest Missouri State University, 2006.<br>The full text of the thesis is included in the pdf file. Title from title screen of full text.pdf file (viewed on January 25, 2008) Includes bibliographical references.

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35

Uddin, Jashim. "Soil organic carbon dynamics in two major alluviums of Bangladesh." Thesis, Kingston University, 2016. http://eprints.kingston.ac.uk/35756/.

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This study was designed to evaluate the status, distribution, spatial variability, controlling factors, storage, and change in the levels of soil organic carbon (SOC) in two major alluviums of Bangladesh. The two alluviums the Brahmaputra and the Ganges were selected because they occupy a large area of Bangladesh with a wide diversity of agro-ecosystems. SOC levels were studied across the four sub-sites in the aforementioned alluviums at 0-30 cm depths to evaluate their spatial and temporal variability. The sub-sites, Delduar and Melandah, are in the Brahmaputra alluvium. The other two sub-sit

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36

Allen, Charles Edward. "Alpine Soil Geomorphology: The Development and Characterization of Soil in the Alpine-Subalpine Zone of the Wallowa Mountains, Oregon." PDXScholar, 1995. https://pdxscholar.library.pdx.edu/open_access_etds/5217.

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Alpine soils are young, poorly developed soils that occur above treeline. This study investigates soils located in the alpine-subalpine zone of the Wallowa Mountains, northeast Oregon. Parent material, topography, and vegetation are the most influential pedogenic factors in the high alpine landscape of the Wallowas. Soil samples were collected from the Eagle Cap Wilderness Area of the Wallowas at three mountain locations: Eagle Cap, Sacajawea, and Matterhorn. Catenas were studied in the Windblown and Minimum Snowcover zones to examine different pedogenic factors, according to the Synthetic Alp

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37

Gullberg, Rebecka. "Carbon - Past, Present and Future : Effects of 20th century land use on soil organic carbon in Nynäs nature reserve, Sweden." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-157449.

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The land use sector has the potential not only to lower its greenhouse gas emissions, but also to sequester CO2 in soils through land use change and management practices. This represents an important mitigation opportunity, but there is a lack of knowledge in the potential of carbon sequestration between different land use types. This study examines soil organic carbon content and soil organic matter in a nature reserve in eastern middle Sweden. Methods include a change analysis of land use, values for soil organic carbon content from a literature review and soil samples for concentrations of

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38

Dwyer, Todd Douglas. "Development of a physical slope failure model /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1421132.

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39

Boddice, Daniel. "Changing geophysical contrast between archaeological features and surrounding soil." Thesis, University of Birmingham, 2015. http://etheses.bham.ac.uk//id/eprint/6270/.

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Electromagnetic (EM) techniques are used to locate and map archaeological features through differences in soil EM properties (linked to geotechnical properties and climatic conditions), but these have poorly understood seasonality to their response, and poor performance on certain (especially fine grained) soils. Customised Time Domain Reflectometry (TDR) monitoring stations were used to collect hourly apparent relative dielectric permittivity (ARDP), bulk electrical conductivity (BEC) and temperature data from archaeological features and the surrounding soil matrix (SSM) for four sites over a

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40

Özacar, Biricik Gözde. "Impacts of Urbanization on Flood and Soil Erosion Hazards in Istanbul, Turkey." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/307006.

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Due to the inappropriate planning and explosive population growth in urban areas, especially in developing countries, sustainable and disaster-safe urbanization has become the most important challenge for governments. Urbanization presents benefits in different ways but has led simultaneously to changes in land use/land cover (LULC), impacting soil quality, runoff, surface temperature, water quality, and promoting climate change. The environmental implications of LULC changes cannot be understood well enough to take precautions without the knowledge of LULC change. This reality is the driving

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41

Harney, Pawel. "Hydrological carbon transport in the Abiskojokka catchment area : The relationship between soil organic carbon content and dissolved organic carbon concentrations in stream water." Thesis, Stockholms universitet, Institutionen för naturgeografi och kvartärgeologi (INK), 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-108485.

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Soils in permafrost regions hold substantial amounts of carbon, much of which has accumulated due to processes that are related to cold temperatures. A warming climate will alter the dynamics governing the fluxes of carbon within a system and consequently the pools of carbon therein. Of particular concern is whether previously stored carbon will be released to the atmosphere contributing to the pool of greenhouse gases and creating a feedback effect. At the moment the International Panel of Climate Change (IPCC) does not include carbon dynamics of the Arctic in their forecast models due to a l

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42

Kang, Katherina A. "Soil Carbon Accumulation in an Urban Ecosystem: Canopy Cover and Management Effects." Thesis, University of North Texas, 2020. https://digital.library.unt.edu/ark:/67531/metadc1703418/.

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Black carbon (BC), a stable form of organic carbon (OC), is a byproduct of the incomplete combustion of biomass, biofuels, and fossil fuel. The main objectives of this research are to examine the spatial distribution of OC and BC in urban soil and determine the influence of tree canopy cover and landscape maintenance on soil carbon accumulation. Soil sampling was conducted at 29 sites throughout the City of Denton, Texas, in May 2019. Samples were collected from underneath post oak canopies and in adjacent open areas and were analyzed for total carbon (TC), total organic carbon (TOC), total N

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43

Weih, Robert C. "Evaluating methods for characterizing slope conditions within polygons." Diss., This resource online, 1991. http://scholar.lib.vt.edu/theses/available/etd-06062008-171008/.

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44

Robertson-Rintoul, Melanie S. E. "River planform, soil stratigraphy and the temporal and palaeoenvironmental significance of terraced valley fill deposits in upland Scotland, with specific reference to Glen Feshie, south-west Cairngorms." Thesis, University of Hull, 1986. http://hydra.hull.ac.uk/resources/hull:13132.

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River terraces form prominent features of the valley floor morphology of many upland valleys in Scotland. Little is known, however, about valley floor landform development in many of these valleys. Previous studies have generally explained the terraces as the outwash products of meltwaters from the most recent cold periods. Detailed investigation of a major valley in the Scottish Highlands challenges, for at least one site, this well established concept and proposes the occurrence of at least three phases of Holocene terrace development. The correlation of terrace surfaces has traditionally be

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45

Peters, Nigel Ronald. "Soil development, environmental history and the dating of terraced valley fill deposits in the North York Moors, with specific reference to Dovedale Griff and Jugger Howe Beck." Thesis, University of Hull, 1989. http://hydra.hull.ac.uk/resources/hull:13389.

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Detailed investigation of the valley fill deposits of Dovedale Griff and Jugger Howe Beck, together with a sedimentological and palaeomagnetic investigation of the sediments of Lake Gormire, provide the basis for an integrated analysis of the temporal and palaeoenvironmental aspects of Holocene valley floor landform development in the North York Moors. A Holocene alluvial chronology is developed for Dovedale Griff and Jugger Howe Beck based on surface soil stratigraphy, radiocarbon dating, morphology and sediment stratigraphy. Surface soils developed into the deposits of the Dovedale Griff ter

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46

Nikfal, Mohammadreza. "Developing a Soil Moisture-Based Irrigation Scheduling Tool (SMIST) Using Web-GIS Technology." Thesis, University of North Texas, 2018. https://digital.library.unt.edu/ark:/67531/metadc1157621/.

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Software as a service (SaaS) is a primary working pattern and a significant application model for next generation Internet application. Web GIS services are the new generation of the Software as a service that can provide the hosted spatial data and GIS functionalities to the practical customized applications. This study focused on developing a webGIS based application, Soil Moisture-Based Irrigation Scheduling Tool (SMIST), for predicting soil moisture in the next seven days using the soil moisture diagnostic equation (SMDE) and the upcoming seven precipitation forecasts made by the National

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47

ODea, Mary Elizabeth. "Arbuscular mycorrhiza: A linkage of plant, soil and surface hydrologic processes in a southwest grassland." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/284211.

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A three-year randomized field study was undertaken to evaluate the effects of prescribed burning and the intense rainfall events associated with the summer monsoon of southern Arizona, specifically examining the interchange between the plant, soil and surface hydrologic processes within a savanna. The effects of fire and rainfall treatments were evaluated by examining their specific effects on vegetation, arbuscular mycorrhizal fungi (AMF), soil structure, soil nutrient capital, surface runoff and sediment. In addition to the field study, two factorial greenhouse studies were completed in conj

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48

Ingram, Mrill. "Fertile ground: Geographies of knowledge about soil fertility in the United States alternative agriculture movement." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/290033.

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I argue in this dissertation, that alternative agriculture offers an epistemological challenge to the conventional approach to food production. To put it succinctly: alternative agriculture is not just about another way to grow; it's about another way to know. I test this hypothesis through an examination of the discourses of three of the more organized networks in U.S. alternative agriculture: biodynamics, organics and ecoagriculture. These networks have supported research, education and outreach activities around alternative agriculture for decades. I focus on people and institutions of the

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Sebadduka, Jerome. "Mapping soil-landscape elements and the wetland in dambos and estimating CH4 and CO2 emissions from a dambo-terminated catena." Thesis, Washington State University, 2014. http://pqdtopen.proquest.com/#viewpdf?dispub=3640076.

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<p> Dambos are seasonally saturated grassy valleys mainly found on the central African plateau. They are usually sub-divided into three catenary units - gleyed and frequently inundated bottoms, flat and rarely inundated floors, and sloping sandy margins - fringed at the interfluve by the well-drained uplands. Since dambos constitute &sim;11% of Africa's arable land, soil information is required to guide sustainable use of the land. Further, it is important to determine the extent of the wetland environment in these landscapes so as to avoid miss-use of the land, which could arise because of va

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Schuster, Doug E. "Soil Moisture Effects on Supercellular Convective Initiation and Atmospheric Moisture in the Midwestern United States." Ohio University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1462232761.

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