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Dissertations / Theses on the topic 'Soil water moisture content deficiency'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Gherardi, Mark James. "Availability and management of manganese and water in bauxite residue revegetation." University of Western Australia. Soil Science and Plant Nutrition Discipline Group, 2004. http://theses.library.uwa.edu.au/adt-WU2005.0038.

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[Truncated abstract] Industrial processing to refine alumina from bauxite ore produces millions of tonnes of refining residue each year in Australia. Revegetation of bauxite residue sand (BRS) is problematic for a number of reasons. Harsh chemical conditions caused by residual NaOH from ore digestion mean plants must overcome extremely high pH (initially >12), saline and sodic conditions. At such high pH, manganese (Mn) is rapidly oxidised from Mn2+ to Mn4+. Plants can take up only Mn2+. Thus, Mn deficiency is common in plants used for direct BRS revegetation, and broadcast Mn fertilisers ha

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2

Zeywar, Nadim Shukry 1959. "Effect of sensor placement on the relationships of crop water stress index, soil moisture tension and soil moisture content." Thesis, The University of Arizona, 1988. http://hdl.handle.net/10150/191981.

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A field experiment was conducted to investigate the feasibility of making one measurement of soil moisture tension/content or crop water stress index (CWSI), and from it determine when and how much to irrigate. Cotton (Gossvpium hirsutum C.V. DPL-90) was planted in a sandy loam soil prepared with an underground drip irrigation system. Measurements of soil moisture tension, soil moisture content, plant temperature, and wet- and dry-bulb temperatures were made. The results indicate that soil moisture tension above 0.30 m and soil moisture content above 0.50 m in the root zone can be used as good

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3

George, Brendan Hugh. "Comparison of techniques for measuring the water content of soil and other porous media." University of Sydney, 1999. http://hdl.handle.net/2123/491.

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The measurement of water in soil on a potential, gravimetric or volumetric basis is considered, with studies concentrating on the measurement of water by dielectric and neutron moderation methods. The ability of the time-domain reflectometry technique to measure water content simultaneously at different spatial locations is an important advantage of the technique. The reported apparent dielectric by the TRASE� time-domain reflectometer and Pyelab time-domain reflectometry systems is sensitive to change in extension cable length. In some soil, e.g. a commercial sand, the response to increasi

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4

Alvenäs, Gunnel. "Evaporation, soil moisture and soil temperature of bare and cropped soils /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5714-9.pdf.

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5

Dowell, Ryan. "Biomass production of five populus clones, soil carbon and soil water content in a central Missouri floodplain." Diss., Columbia, Mo. : University of Missouri-Columbia, 2006. http://hdl.handle.net/10355/4549.

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Thesis (M.S.)--University of Missouri-Columbia, 2006.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file viewed on (February 7, 2007) Includes bibliographical references.

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6

Levitt, Daniel Glenn 1960. "The use of reflected middle infrared and emitted thermal radiation in the remote sensing of soil water content." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/277206.

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Reflectance and temperature of bare field soil were measured to determine the relationship between soil water content and spectral reflectance and temperature. Reflectance in the six reflective Thematic Mapper (TM) wavebands plus a 1.15 to 1.30 μm waveband (referred to as MMR5) was measured using a ground-based radiometer across a soil water gradient provided by a line source sprinkler system. Temperature was measured using a hand-held infrared thermometer. The results of this study show that TM band 7 reflectance (2.05-2.30 μm) provided improved estimates of surface soil water content (0-0.5

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7

Entus, Jonathan. "Use of time domain reflectometry to monitor water content and electrical conductivity of saline soil." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0032/MQ64350.pdf.

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8

Berg, Karin. "Simulations of groundwater levels and soil water content : Development of a conceptual hydrological model with a continous soil profile." Thesis, Linköping University, Department of Thematic Studies, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-1910.

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<p>Transport of chemical substances through a catchment depend to a large extent on the water content of the soil through which they are transported. When the groundwater level rise and fall, redox conditions change in the soil and the transport of substances is affected. </p><p>The aim of this study is to develop a hydrological model which is able to simulate soil water content at different depths and groundwater level in a soil profile. A new type of conceptual model is developed, which uses a continous represenation of the soil and soil water from the soil surface down to the bedrock. The m

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9

Roberson, Travis Leon. "Improving Soil Moisture Assessment of Turfgrass Systems Utilizing Field Radiometry." Thesis, Virginia Tech, 2019. http://hdl.handle.net/10919/87391.

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The need for water conservation continues to increase as global freshwater resources dwindle. In response, many golf course superintendents are implementing new methods and tools to become more frugal with their water applications. For example, scheduling irrigation using time-domain reflectometer (TDR) soil moisture sensors can decrease water usage. Still, TDR measurements are time-consuming and only cover small scales, leading to many locations being unsampled. Remotely sensed data such as the normalized difference vegetation index (NDVI) offer the potential of estimating moisture stress acr

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10

Mahinda, Athuman Juma. "SOIL WATER AND NUTRIENT MANAGEMENT FOR IMPROVING SORGHUM PERFORMANCE IN DRYLAND AREAS OF TANZANIA." Kyoto University, 2020. http://hdl.handle.net/2433/245848.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第22163号<br>農博第2377号<br>新制||農||1074(附属図書館)<br>学位論文||R2||N5243(農学部図書室)<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授舟川晋也, 教授縄田栄治, 准教授真常仁志<br>学位規則第4条第1項該当

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11

Ekanayake, Jagath C. "Soil water movement through swelling soils." Lincoln University, 1990. http://hdl.handle.net/10182/1761.

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The present work is a contribution to description and understanding of the distribution and movement of water in swelling soils. In order to investigate the moisture distribution in swelling soils a detailed knowledge of volume change properties, flow characteristics and total potential of water in the soil is essential. Therefore, a possible volume change mechanism is first described by dividing the swelling soils into four categories and volume change of a swelling soil is measured under different overburden pressures. The measured and calculated (from volume change data) overburden potentia

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12

Lagergren, Fredrik. "Effects of thinning, weather and soil moisture on tree and stand transpiration in a Swedish forest /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-6315-7.pdf.

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13

Montzka, Carsten, Heye Bogena, Marek Zreda, et al. "Validation of Spaceborne and Modelled Surface Soil Moisture Products with Cosmic-Ray Neutron Probes." MDPI AG, 2017. http://hdl.handle.net/10150/623251.

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]The scale difference between point in situ soil moisture measurements and low resolution satellite products limits the quality of any validation efforts in heterogeneous regions. Cosmic Ray Neutron Probes (CRNP) could be an option to fill the scale gap between both systems, as they provide area-average soil moisture within a 150-250 m radius footprint. In this study, we evaluate differences and similarities between CRNP observations, and surface soil moisture products from the Advanced Microwave Scanning Radiometer 2 (AMSR2), the METOP-A/B Advanced Scatterometer (ASCAT), the Soil Moisture Act

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14

Schuh, Carina. "Influence of soil moisture content and infiltration on ground temperature and active layer depth in a river terrace in Adventdalen, Svalbard." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-121459.

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The active layer constitutes an important subsystem of permafrost environments. Thermal andhydrological processes in the active layer determine local phenomena such as erosion, hydrologicaland ecosystem changes, and can have implications for the global carbon-climate feedback.Despite their importance for environmental and climate change, active layer dynamics are stillonly poorly understood. The importance of hydrology for active layer processes is generallywell acknowledged on a conceptual level, but the physical interdependencies between soil moisture,subsurface water flows and active layer

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15

Marryanna, Lion. "Effects of spatio-temporal distribution of soil moisture on a lowland dipterocarp forest at Pasoh Forest Reserve in Peninsular Malaysia." Kyoto University, 2018. http://hdl.handle.net/2433/232153.

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16

Alavi, Ghasem. "Climate, leaf area, soil moisture and tree growth in spruce stands in SW Sweden : field experiments and modelling /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5710-6.pdf.

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17

Zhou, Xiaomin 1962. "Agronomic and physiological aspects of nitrogen and water management for monocrop corn and corn competing with a ryegrass intercrop." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34491.

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Concern about NO$ sb3 sp-$-N leaching and groundwater pollution from monoculture corn (Zea mays L.) has prompted investigation of alternative production systems which reduce N leaching. Both intercrop systems and water table controls alone have been shown to increase nitrogen (N) uptake and reduce soil NO$ sb3 sp-$-N accumulation in cropping systems. There is a need to maintain crop productivity while reducing the potential for soil NO$ sb3 sp-$-N leaching into groundwater. However, there has been no information available regarding agronomic and physiological aspects of N and water management

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18

Pfeiffer, Steven S. "Effects of Lonicera maackii on soil water content and tree seedlings in eastern deciduous forest." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1375221589.

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19

Materechera, Simeon Albert. "The influence of soil organic matter on changes in leaf water potential of barley (Hordeum vulgare L.) during repeated cycles of moisture stress /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63288.

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20

Haddad, Ola. "The effects of burn severity on soil properties : Infiltration rate, moisture, grain size distribution and carbon content Hälleskogsbrännan as an example." Thesis, Stockholms universitet, Institutionen för naturgeografi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-135798.

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This study focuses on soil hydrological parameters that are expected to be related to burn severity in forests; infiltration rate, soil moisture, grain size distribution and carbon content along a burn severity gradient in Västmanland Sweden, where a major fire occurred in 2014. Hälleskogsbrännan was divided into two burn severities: a moderate severity and a high severity, and a control area. Ten soil samples were taken for laboratory analyses at each severity level. Soil moisture and infiltration rate was measured in situ. Infiltration rates and soil moisture were highest in the most severel

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21

Niemeier, James J. "Radio in hydroscience: unconventional links and new sensor possibilities." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/863.

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One can use unlicensed and often very inexpensive radios for unconventional communication (underwater- and underground) links. However, one can go further, and use these radios as sensors rather than communication links. Such communication links and sensors can have important application in hydroscience. While the attenuation of RF signals is high in these mediums, by using the wireless sensor network (WSN) paradigm of multi-hop and retransmission, reliable networks can be formed underwater and underground. One no longer needs to think of RF modules as only a source of data transmission. This

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22

Woldetsadik, Kebede. "Shallot (Allium cepa var. ascolonicum) responses to plant nutrients and soil moisture in a sub-humid tropical climate /." Alnarp : Dept. of Crop Science, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a367.pdf.

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23

Menezes, Marla Bruna Melo de. "Análise da influência do teor de umidade na absorção d\'água e sucção dos solos em estudo de erodibilidade." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/18/18132/tde-02122010-105850/.

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O estudo da erodibilidade ganha importância quando se tratam de solos localizados em regiões tropicais, caracterizadas por altas pluviosidades e evaporações que dificilmente permitem ao maciço atingir um estado de saturação em campo. A erodibilidade e as propriedades hidráulicas determinam as condições de infiltração e de escoamento superficial e podem acelerar as feições erosivas através das perdas de partículas. Neste trabalho, observou-se que o grau de saturação in situ estabelece um potencial de sucção matricial (Sm) capaz de orientar o fluxo, absorção e armazenamento da água nos poros do

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24

Hurtado, Ana Lucia Berretta. "Variabilidade da condutividade hidráulica do solo em valores fixos de umidade e de potencial matricial." Universidade de São Paulo, 2004. http://www.teses.usp.br/teses/disponiveis/11/11143/tde-21092004-144353/.

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O conhecimento da condutividade hidráulica do solo é essencial para qualquer modelagem que envolva o movimento da água no solo. Além de variar com a umidade, a condutividade hidráulica do solo (K) apresenta alta variabilidade espacial, tanto em determinações no campo como no laboratório, podendo ser representada em função da umidade (θ) ou do potencial matricial (ψm). Conforme indica a Lei de Poiseuille, a condutância de poros individuais é altamente sensível ao seu diâmetro. Como a distribuição dos diâmetros de poros de um solo é descrita pela sua curva de retenção e o maior poro qu

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25

Carrick, Sam. "The dynamic interplay of mechanisms governing infiltration into structured and layered soil columns." Lincoln University, 2009. http://hdl.handle.net/10182/1328.

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Worldwide there is considerable concern over the effects of human activities on the quantity and quality of freshwater. Measurement of infiltration behaviour will be important for improving freshwater management. This study identifies that New Zealand has a sporadic history of measuring soil water movement attributes on a limited number of soil types, although the current practical demand should be large for management of irrigation, dairy farm effluent disposal, as well as municipal / domestic waste- and storm-water disposal. Previous research has demonstrated that infiltration behaviour is g

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26

Komárková, Markéta. "Vliv základní agrotechniky na fyzikální a hydrofyzikální vlastnosti půdy." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2018. http://www.nusl.cz/ntk/nusl-372322.

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In the master’s thesis, we evaluate the impact of different types of soil treatment on the physical and hydro-physical properties of the subsurface layers of soil. The experimental research took place near the town of Šakvice in two chosen areas treated conventionally, i.e. by tillage. The PRP SOL substance was applied to one of the observed areas. Unimpaired soil samples were taken during the vegetation period of the grown crops in the topsoil (10,20 cm) and in the undersoil (30 cm) on 13th May 2009 and on 10th September 2009. The chosen physical parameters of the soil, i.e. the reduced volum

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27

Nielsen, Kerry E. "Soil water content and corn yield response to grass and grass-legume mixture winter cover crops in east central Indiana." 2013. http://liblink.bsu.edu/uhtbin/catkey/1712470.

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Cover crops may be used as a management tool in modifying soil water content, helping lower agriculture’s impact on water quality and lead to greater crop yields. During the 2012 growing season, a field study was conducted in Albany, IN to determine: 1) the impact of cover crops on soil moisture throughout the growing season and 2) cover crops’ influence on corn (Zea mays) yield. Treatments of a monoculture of annual ryegrass (Lolium multiflorum) (AR), a mixture of annual ryegrass (Lolium multiflorum), crimson clover (Trifolium incarnatum), and groundhog radish (Raphanus sativus) (MIX), were c

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28

Adhikari, Bishwodeep. "The Contributions of Soil Moisture and Groundwater to Non-Rainfall Water Formation in the Namib Desert." Thesis, 2019. http://hdl.handle.net/1805/20533.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>Non-rainfall waters such as fog and dew are considered as important source of water in drylands, and the knowledge of possible sources of its formation is very important to make future predictions. Prior studies have suggested the presence of radiation fog in drylands; however, its formation mechanism still remains unclear. There have been earlier studies on the effects of fog on soil moisture dynamics and groundwater recharge. On the contrary, no research has yet been conducted to understand the contribution of soil moisture and gro

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29

Strock, Jeffrey S. "Nitrate and water under terraced dryland wheat production in Oregon." Thesis, 1995. http://hdl.handle.net/1957/35093.

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Dry land agriculture using summer fallow is a common crop production practice in the Columbia Plateau region of eastern Oregon. Farmed-over level terraces are used to control surface water runoff and soil erosion. More than 70 percent of the average annual precipitation around Pendleton, Oregon (350 - 400 mm) falls as low intensity, long duration rainfall from September to March. Wetter soil zones typically occur above and below the terrace. These areas have a higher potential for crop production as well as for movement of chemicals to ground water and to surface water where seepage occurs. Th

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30

Roberts, Michael C. (Michael Coy) 1951. "Field sampling and mapping strategies for balancing nitrogen to variable soil water across landscapes." Thesis, 1991. http://hdl.handle.net/1957/36516.

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31

Sayde, Chadi. "Improving soil water determination in spatially variable field using fiber optic technology and Bayesian decision theory." Thesis, 2012. http://hdl.handle.net/1957/28778.

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Achieving and maintaining sustainability in irrigated agriculture production in the era of rapidly increasing stress on our natural resources require, among other essential actions, optimum control and management of the applied water. Thus, a significant upgrade of the currently available soil water monitoring technologies is needed. The primary goal of this work was to reduce the uncertainties of spatially variable soil water in the field. Two approaches are suggested: 1) The Bayesian decision model that implicitly accounts for spatial variability at minimal cost based on limited field data,

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32

Floyd, William C. "Seasonal relationships between dissolved nitrogen and landuse/landcover and soil drainage at multiple spatial scales in the Calapooia Watershed, Oregon." Thesis, 2005. http://hdl.handle.net/1957/9501.

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The Calapooia River, a major tributary of the Willamette River in western Oregon, is a watershed typical of many found in the Willamette Basin. Public and private forested lands occur in the steep Upper Zone of the watershed, mixed forest and agriculture lands are found in the Middle Zone, and the Lower Zone of the watershed is comprised primarily of grass seed agriculture on relatively flat topography with poorly drained soils. High levels of dissolved nitrogen (DN) have been identified as a water-quality concern within the Calapooia River. To gain a better understanding of the relationship b

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33

Birth, Volker. "Biologischer Abbau organischer Substanz bei unterschiedlichem Wassergehalt in einem Modellversuch." 2019. https://htw-dresden.qucosa.de/id/qucosa%3A34174.

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In der Landnutzung stellt die Bewertung der Versorgung mit organischer Bodensubstanz (OBS) eine besondere Herausforderung dar. Dabei wird der Einfluss der Bodenfeuchte aufgrund des globalen Klimawandels an Bedeutung gewinnen, da die Wasserverfügbarkeit Einfluss auf die Aktivität der bodenlebenden Mikroorganismen nimmt. Ziel der Arbeit waren daher Aussagen, inwieweit verschiedene Wassergehalte den biologischen Umsatz bei der Inkubation von Bodenproben mit unterschiedlicher Herkunft sowie organischer Düngung beeinflussen. In einem Modellversuch wurden Bodenproben ungedüngter Parzellen von drei d

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34

Peixoto, Alexandre Coumiotis Moreira. "Desenvolvimento de software de controlo e análise de uma Sonda Multi-Funcional para medição de propriedades do solo." Master's thesis, 2010. http://hdl.handle.net/10348/664.

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Dissertação de Mestrado em Engenharia Electrotécnica<br>Hoje em dia, com o desenvolver da técnica de gestão de processos agrícolas, torna-se imperativo a utilização de aparelhos de medição mais precisos e baratos de forma a rentabilizar o processo agrícola. Tradicionalmente, a instrumentação associada a esse tipo de aparelhos revela alguns pontos fracos a serem desenvolvidos, tais como a necessidade de fios ou então o desfasamento temporal entre leitura e verificação dos dados. Além disso, as mais recentes técnicas de controlo baseadas na resposta fisiológica das plantas requerem a monitorizaç

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