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Dissertations / Theses on the topic 'Soil physical properties'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Masiyandima, Mutsa Cecelia. "The effect of tine geometry on soil physical properties." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23284.

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The physical state of the seedbed is of importance to the plant environment as it influences some important processes in the soil such as seedling emergence, water and solute transport, and ease of root penetration. This is affected to a large extent by tillage process, the tillage implement type and the geometry of the implement used.<br>A field experiment was carried out on a clay soil to determine the effect of the geometry of bladed tillage implements on some soil physical properties after tillage. The soil properties evaluated were bulk density, mean clod size distribution and total pore

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2

Ghassemi, Ali. "Nonparametric geostatistical estimation of soil physical properties." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63904.

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3

Holland, Jonathan Eddison. "Changes in soil physical properties under raised bed cropping /." Connect to thesis, 2006. http://eprints.unimelb.edu.au/archive/00002537.

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4

Biscaro, André Scatena Arriaga Francisco J. "Management and landscape variability effects on selected coastal plain soil physical properties." Auburn, Ala, 2008. http://repo.lib.auburn.edu/EtdRoot/2008/SPRING/Agronomy_and_Soils/Thesis/Biscaro_Andre_51.pdf.

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5

Stinghen, Geovanne Silva. "Assessment of nitrogen efficiency in maize due to soil compaction and changes in soil physical properties /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p1422967.

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6

Pengthamkeerati, Patthra. "Soil physical and microbiological properties affected by soil compaction, organic amendments and cropping in a claypan soil /." free to MU campus, to others for purchase, 2004. http://wwwlib.umi.com/cr/mo/fullcit?p3164537.

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7

Benitez, Lionel Ernesto Donatti. "SPATIAL VARIATION OF PHYSICAL PROPERTIES IN AN IRRIGATED FIELD (ARIZONA)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275402.

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8

Zou, Chris Bocai. "Soil physical properties and root growth of radiata pine." Thesis, University of Canterbury. Forestry, 1999. http://hdl.handle.net/10092/7493.

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Soil water potential decreased exponentially and soil strength increased logarithmically as the volumetric water content decreased in soils of contrasting texture at a range of bulk densities. Soil air-filled porosity was a linear function of volumetric water content. At constant soil strength and non-limiting soil air-filled porosity (≥ 0.16 cm³ cm-³ the root elongation rate of radiata pine seedlings decreased linearly with soil water potential in the range - 0.01 to - 0.20 MPa. The rate of decrease in elongation rate was reduced with increasing soil strength. When soil water potential was <

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9

Alrajehy, Abdulrahman Mohammed. "Relationships between reflectance and soil physical and chemical properties." Master's thesis, Mississippi State : Mississippi State University, 2002. http://library.msstate.edu/etd/show.asp?etd=etd-10012002-122014.

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10

Ahmed, Abdulkadir Sh Ali 1955. "Soil physical properties and test of empirical permeability calculations." Thesis, The University of Arizona, 1986. http://hdl.handle.net/10150/191895.

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Physical properties of texture, bulk density, saturated hydraulic conductivity, moisture characteristic curve and unsaturated hydraulic conductivity, expressed as relative K were determined for 25 bulk samples and 66 undisturbed soil cores collected from the University of Arizona Maricopa Agricultural Center. The CV values were evaluated for all parameters studied and their ranges were all found to be in agreement with the guidelines of Warrick and Nielsen (1980). Empirical models were used for calculation of saturated K moisture characteristics and unsaturated K. The calculated data were comp

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11

Logsdon, Sally D. "Corn root growth and distribution as influenced by soil physical properties." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/52304.

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Mechanisms of root growth under variable field conditions were investigated by observing corn ( Zea mays L.) root growth and distribution in the field and by observing the influence of soil physical stresses on corn seedling root growth in controlled environments. The field soil was Groseclose silt loam (clayey, mixed, mesic Typic Hapludult). Groseclose A horizon material was used for the growth chamber experiments where corn was grown in a range of aggregate sizes, bulk densities, low and high soil moisture levels, and temperatures. Rooting patterns in the field were altered by drought. Root

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12

Clarke, Francis J. "Effects of Biofuel Crops on Soil Physical and Hydrological Properties on a Miamian Soil in Central Ohio." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu158592486603924.

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13

Hess, H. M. "Acoustical determination of physical properties of porous grounds." Thesis, Open University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.382953.

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14

Maribeng, Lebea. "The influence of parent material (granite and schist) on physical and chemical properties of soils on the Syferkuil Experimental Farm." Thesis, University of Limpopo (Turfloop Campus), 2007. http://hdl.handle.net/10386/606.

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Thesis (M.Sc. (Soil Science)) --University of Limpopo (Turfloop campus), 2007<br>The influence of parent material on physical and chemical properties of soil was studied on granite and schist derived soils on the Syferkuil Experimental Farm, situated in the Mankweng area of the Limpopo Province of South Africa. A total of 49 samples of virgin soils were collected, where granite soils constituted 26 samples and schist soils 23. The study design that was used is cross-sectional. The samples were analysed for physical and chemical properties. The physical properties of granite and schist so

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15

Richman, Jacinda. "Soil physical properties under the influence of different mechanical weeders." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0003/MQ44259.pdf.

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16

Wood, Matthew James. "The effects of mechanised forest harvesting on soil physical properties." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369876.

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17

Morgan, Mark T. "Evaluation of a soil physical properties measurement system SP²MS /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487759914762283.

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18

Tippett, Mark Donovan. "Impacts of timber harvesting on soil physical properties in wetlands." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-09292009-020154/.

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19

Chan, Chee-Wan. "Effects of powered harrow operating parameters on soil physical properties." Connect to resource, 1992. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1200585211.

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20

Nciizah, Adornis Dakarai. "Cattle manure, scalping and soil wetness effects on some physical properties of a hardsetting soil and associated early maize growth." Thesis, University of Fort Hare, 2011. http://hdl.handle.net/10353/349.

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Most soils in the Eastern Cape Province, South Africa are shallow and are low in organic matter. Therefore these soils are structurally fragile and highly susceptible to inherent degradative processes like hardsetting. The objective of this study was to determine the effect of cattle manure, scalping and soil wetness on aggregate stability, penetration resistance and early maize growth in hardsetting soils. Glasshouse and field studies were conducted to determine the effect of cattle manure on aggregate stability and penetration resistance of freshly exposed topsoils by scalping at 0, 10 and 2

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21

Zeelie, Angelique. "Effect of biochar on selected soil physical properties of sandy soil with low agricultural suitability." Thesis, Stellenbosch : Stellenbosch University, 2012. http://hdl.handle.net/10019.1/20344.

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Thesis (MScAgric)--Stellenbosch University, 2012<br>ENGLISH ABSTRACT: Biochar has been labelled to be a key factor in the global carbon mitigation act and has been described as the modern day equivalent (terra nova) to the terra preta dark earth soils of the Brazilian Amazon. Globally biochar has been evaluated as a means to improve soil fertility and to mitigate greenhouse gases (GHGs). Little research has however been published on the effects of biochar incorporation on soil physical properties. The objective of this study was to evaluate the effect of pine sawmill waste derived bioc

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22

Naderpour, Nader 1959. "Application of kriging to study spacial variability of soil physical properties." Thesis, McGill University, 1986. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65963.

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23

Shaykewich, Jennifer A. "Impact of leonardite amendments on soil physical properties of two soils related to grain production." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ57578.pdf.

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24

Itabari, Justus Kubai. "Soil physical properties of seedbeds affecting maize establishment in eastern Kenya." Thesis, University of Reading, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.259181.

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25

Roseberg, Richard James. "Positional dependence of tillage-induced soil physical properties influencing root growth /." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487677267728298.

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26

Viljoen, Daniel Willem. "Evaluation of the effect of an orange oil based soil Ameliorant on selected soil physical properties." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79826.

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Thesis (MScAgric)--Stellenbosch University, 2013.<br>ENGLISH ABSTRACT: A new orange oil based soil ameliorant is available on the market. Apart from the orange oil, the other main constituents of the product are a nonionic surfactant and an anionic surfactant. Surfactants are used in the agricultural sector, amongst others, as a countermeasure for soil with poor infiltrability or with hydrophobic characteristics. Farmers who applied the orange oil based soil ameliorant to the soil observed a positive growth response by the crop. However, the main concern about surfactants is that it can cause

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27

Overstreet, Laura Flint. "RELATIONSHIPS BETWEEN SOIL BIOLOGICAL AND PHYSICAL PROPERTIES IN A LONG-TERM VEGETABLE MANAGEMENT STUDY." NCSU, 2005. http://www.lib.ncsu.edu/theses/available/etd-10312005-033217/.

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Agricultural management decisions that influence biological activity and diversity include tillage, fertilizer and pest-control inputs, and crop rotations. Our research objective was to characterize relationships between biological and physical properties resulting from long-term agricultural management decisions. A nine-year old factorially-designed field experiment was used to examine the effects of tillage (moldboard plow or strip-tillage), input (synthetic fertilizers and pesticides or inputs approved for organic certification programs), and crop rotation (continuous staked tomatoes or 3-y

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28

Vig-Dinescu, Ina-Mariana. "Tillage, rotation, and N fertilizer rate effects on surface soil physical properties." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0019/MQ37306.pdf.

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29

Vig-Dinescu, Ina. "Tillage, rotation, and N fertilizer rate effects on surface soil physical properties." Thesis, McGill University, 1997. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28031.

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In 1991, a project was initiated at Quinn and Ormstown, two sites with soils representative of Quebec's present-day agriculture. Three field management techniques were studied related to their possible impact on the soils: tillage, rotation, and N fertilization. The three treatments were randomly assigned in two blocks of a split-split-plot design. The main treatment, tillage, had two levels, conventional tillage (CT) and no-till (NT). The sub-treatment was represented by five 4-year rotations, starting from 1991 as follows: CCCC (continuous corn), CSAC (corn-soybean-alfalfa-corn), CSCS (corn-

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30

Hathaway-Jenkins, Laura Jane. "The effect of organic farming on soil physical properties, infiltration and workability." Thesis, Cranfield University, 2011. http://dspace.lib.cranfield.ac.uk/handle/1826/6798.

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Organically managed land has increased to 4 % of the total area of agricultural land in the UK. Changing land management can impact upon the rural environment (soils, hydrology and biodiversity) and rural community (socio-economics and culture). This thesis aims to compare the effects of organic farming practices on soil physical, chemical and hydrological properties in relation to conventional farming systems. The research combines data from three different scales: field measurements, plot measurements and catchment modelling. At the field scale: 16 pairs of farms (organic and conventional be

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31

Chambers, Brian J. "Lime requirement evaluation and the effects of lime on soil physical properties." Thesis, University of Aberdeen, 1985. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU363194.

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32

Hara, Yuto 1959. "Physical and chemical soil properties affecting the growth habits of agave species." Thesis, The University of Arizona, 1992. http://hdl.handle.net/10150/278200.

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Nine physically and chemically different soil samples from five study sites in which agaves grew, or were grown, were investigated to evaluate the effects of soil physical and chemical properties on the growth habits of agaves. In five Arizona study sites, biomass data of seven agave species has been recorded for the past ten years. Agaves were grown experimentally in the greenhouse using two widely different soil types from the five sites to evaluate growth under controlled conditions. Influence of edaphic factors on agave growth for the study sites and greenhouse experiment was evaluated. Th

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33

Jonsson, Sofia. "The influence of soil and contaminant properties on the efficiency of physical and chemical soil remediation methods." Doctoral thesis, Umeå universitet, Kemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-21040.

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A vast number of sites that have been contaminated by industrial activities have been identified worldwide. Many such sites now pose serious risks to humans and the environment. Given the large number of contaminated sites there is a great need for efficient, cost-effective remediation methods. Extensive research has therefore been focused on the development of such methods. However, the remediation of old industrial sites is challenging, for several reasons. One major problem is that organic contaminants become increasingly strongly sequestered as they persist in the soil matrix for a long

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34

Turpin, Karine. "Macropore flow and soil hydraulic properties as affected by manurebiosolids injector implements under variable soil physical conditions." Thesis, University of Ottawa (Canada), 2005. http://hdl.handle.net/10393/27062.

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The aim of this study was to investigate, at various soil water contents, the tillage effects of two different types of injectors on soil hydraulic properties of a loamy clay soil located in Winchester, Ontario, Canada. The two injectors considered are the AerWay SSD (A) and the Kongskilde Vibro-Flex (K). The soil-properties changes associated with the injectors were assessed at ten different soil water contents for both injectors. The first part of this research involves the evaluation of field saturated hydraulic conductivity (Kfs), matrix flux potential (&phis;m), bulk density (rhob) and vo

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35

Rockhill, Tyler K., and Tyler K. Rockhill. "Influence of Soil Physical and Chemical Properties on Soil Co2 Flux in Semi-Arid Green Stormwater Infrastructure." Thesis, The University of Arizona, 2017. http://hdl.handle.net/10150/626391.

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Rapid population growth and urbanization in semi-arid and arid regions has led to alterations in the water, carbon (C), and nitrogen (N) cycles (Gallo et al. 2014), prompting demands for mitigation strategies. Green Infrastructure (GI) is one of the methods used in urban storm water mitigation that delays and attenuates stormwater runoff by storing water in vegetated depressions. In the Southwest these depressions, also called bioswales, have the potential to act as biogeochemical hot spots, encouraging nutrient cycling, infiltration, plant growth, and microbial activity (McClain et al. 2003

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36

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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37

Kurek, Danielle K. "Effects of prescribed burning on soil physical, biological, and chemical properties of the Oak Openings region of Northwest Ohio." Toledo, Ohio : University of Toledo, 2010. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=toledo1271430752.

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Thesis (M.S.)--University of Toledo, 2010.<br>Typescript. "Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Masters of Science Degree in Biology." "A thesis entitled"--at head of title. Title from title page of PDF document. Bibliography: p. 58-63.

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38

Magomani, Matimba Israel. "The effect of fire management on chemical and physical properties of rangelands." Thesis, University of Fort Hare, 2017. http://hdl.handle.net/10353/6191.

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The use of fire in rangeland has become standard practice for decades; however, there is no shared understanding of how fire affects soil properties. The exact relationship between fire and soil properties is still yet to be understood. The differences in fire frequency, fire intensity, fire severity, the period between fire and sampling resulted in contradictory results amongst studies. A long-term trial at the University of Fort Hare provides a valuable experimental layout for fire research. The trial was established in 1980 with the aim of investigating the effect of burning frequency on ve

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39

Eldiabani, Gibrel S. "Forest fires and their effect on chemical and physical properties of soils in North-eastern-Libya. Assessment of the changes in soil chemical and physical properties of soils in North-eastern-Libya." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5402.

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Forest areas are particularly susceptible to fires, which are often manmade. Too-frequent fires are likely to adversely affect the soil properties as well as vegetation composition, and possibly lead to soil erosion and desertification. One of the most fire affected forest regions in the world is the Mediterranean. Libya, in the Mediterranean region, has soils that are considered to be arid except in a small area called Aljabal Alakhdar (Green mountain), which is the geographic area covered by this study. It is the wettest part of Libya, and has an extensive forest and many agricultural crops.

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40

Eldiabani, Gibrel Salah. "Forest fires and their effect on chemical and physical properties of soils in North-eastern-Libya : assessment of the changes in soil chemical and physical properties of soils in North-eastern-Libya." Thesis, University of Bradford, 2011. http://hdl.handle.net/10454/5402.

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Forest areas are particularly susceptible to fires, which are often manmade. Too-frequent fires are likely to adversely affect the soil properties as well as vegetation composition, and possibly lead to soil erosion and desertification. One of the most fire affected forest regions in the world is the Mediterranean. Libya, in the Mediterranean region, has soils that are considered to be arid except in a small area called Aljabal Alakhdar (Green mountain), which is the geographic area covered by this study. It is the wettest part of Libya, and has an extensive forest and many agricultural crops.

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41

SANTOS, JANILSON S. "Remediacao de solos contaminados com agrotoxicos pelo tratamento com radiacao gama." reponame:Repositório Institucional do IPEN, 2009. http://repositorio.ipen.br:8080/xmlui/handle/123456789/9431.

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Made available in DSpace on 2014-10-09T12:26:45Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T13:59:59Z (GMT). No. of bitstreams: 0<br>Dissertacao (Mestrado)<br>IPEN/D<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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42

Kreba, Sleem. "LAND USE IMPACT ON SOIL GAS AND SOIL WATER TRANSPORT PROPERTIES." UKnowledge, 2013. http://uknowledge.uky.edu/pss_etds/31.

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The consequences of land use choices on soil water and gas transport properties are significant for gas and water flux in agricultural environments. Spatial and temporal patterns and associations of soil water and soil gas characteristics and processes in different land uses are not well understood. The objectives of this study were to 1) characterize soil structure under crop and grass systems, 2) quantify spatial patterns and associations of soil physical characteristics in crop and grass systems, and 3) quantify spatial and temporal patterns and associations of CO2 and N2O fluxes. The resea

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43

Fuentes, San Román Ignacio Francisco. "Soil hydraulics associated with soil physical properties and their effects on nitrate leaching in the mediterranean zone of Chile." Tesis, Universidad de Chile, 2013. http://repositorio.uchile.cl/handle/2250/151712.

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44

Phefadu, Kopano Conferance. "Physico-chemical characterization and spatial variability of soils in the research block at University of Limpopo Experimental Farm." Thesis, University of Limpopo, 2015. http://hdl.handle.net/10386/1686.

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Thesis (MSc. (Soil Science)) -- University of Limpopo, 2015<br>There exists a considerable level of spatial variability in soil physical and chemical properties within the research block; and the soils are generally shallow. Of all the measured parameters, electrical conductivity, Bray-1 P, exchangeable potassium, calcium and sodium as well as extractable iron and zinc showed a huge percent of variation across the field. Soil variability maps indicated the degree of variability within the research block. The spatial variability of the characterized parameters was significant across the researc

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45

Peña, Duarte Miguel Ángel. "Foam as a soil conditioner in tunnelling : physical and mechanical properties of conditioned sands." Thesis, University of Oxford, 2007. http://ora.ox.ac.uk/objects/uuid:b6317eb9-ab3d-48e8-8daa-295e72d7ae59.

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Earth pressure balance (EPB) tunnelling machines are commonly used for the construction of tunnels in soft soils. These machines use the excavated soil in a pressurised head chamber to apply a support pressure to the tunnel face during excavation. How well an unstable face is supported in an EPB machine depends on effectively transferring a constant pressure from the support medium to the surface of the face. If the support pressure is not constant, but instead changes, the varying pressure inevitably leads to collapse of the face or heave on the surface ground. A machine may be designed to wo

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46

Agostini, Francesco. "Effect of soil physical properties on biological control of damping off in sugar beet." Thesis, University of Aberdeen, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.275081.

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The research is focused on soil factors which can affect <i>Pythium ultimum</i> and the bio control properties of <i>Pseudomonas fluorescens </i>and <i>Bacillus subtilis. </i>Similar studies have previously been carried out with results that were not always consistent. One possible explanation was the occurrence of water flow which can influence the location of antagonist bacteria in the rhizosphere, and thus their competitive action. The innovative point of the work was to design a watering method which minimised the possibility of unwanted water flow. Three soil factors were considered:

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47

Jacobs, Addison Denae. "Influence of Cover Crop Species on Soil Physical Properties in a Corn-soybean Rotation." Thesis, Arkansas State University, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10831039.

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<p> As crop land decreases and population increases, soil quality is becoming a concern. Utilizing cover crops in cropping systems could improve soil quality. This study examined 16 treatments of single-species cover crops, cover crop mixes, and two control treatments on a silt-loam soil, in a corn (<i> Zea mays</i> L.) - soybean (<i>Glycine max</i> L. <i> Merr</i>.) crop rotation under no-tillage, to determine their effect on soil physical properties. Cover crop biomass differed (p<0.10) among treatments and produced a maximum of 15.6 Mg ha<sup>-1</sup> of biomass in the crimson clover tre

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48

Burger, Mark Allen. "A wetland trafficability hazard index based on soil physical properties and site hydrology evaluations." Thesis, Virginia Tech, 1994. http://hdl.handle.net/10919/42629.

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Harvesting of forested wetlands in the Atlantic and Gulf lower coastal plains has the potential to cause intense site disturbance. Often, as a result of poor pre-harvest planning, silvicultural activities are performed on wetland soils highly susceptible to rutting and puddling. Potential decreases in pine productivity have been connected with increased soil strength and decreased aeration that are commonly remnants of site disturbances associated with wet-weather harvesting. A simple and economical rating system is needed to identify soils susceptible to disturbance by various types of equipm

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49

Fajardo, Gabriela Isabel. "Physical and Chemical Soil Properties of Ten Virginia Department of Transportation (VDOT) Mitigation Wetlands." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/31304.

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In 1998, the Virginia Department of Transportation (VDOT) adopted standards for soil handling and amendments to improve created non-tidal wetland soil conditions. This study was conducted in sites where these new reconstruction practices were supposedly being implemented. Specific objectives were (i) to determine the relative effects of soil reconstruction practices on mitigation site soils, (ii) to assess the degree to which hydric soil indicators were present, and (iii) to evaluate the relative edaphic potential of mitigation site soils. Soil physical, chemical and morphological properties

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50

Ray, Bart Wayne. "Soil physical properties, moisture availability, crop response and yield for Seneca County, Ohio 1988." The Ohio State University, 1990. http://rave.ohiolink.edu/etdc/view?acc_num=osu1299010230.

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