Dissertations / Theses on the topic 'Soil management'
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Silvertooth, Jeffrey C. "Soil Management and Soil Testing for Irrigated Cotton Production." College of Agriculture, University of Arizona (Tucson, AZ), 2015. http://hdl.handle.net/10150/558523.
Full text5 pp.
In this article we will discuss various aspects of soil evaluation including physical examination, soil sampling and analysis, and soil test interpretation. We will also discuss how these approaches to soil evaluation can be incorporated into both short- and long-term management plans.
Miller, Christopher James. "Mechanisms of water colour release from organic soils and consequences for catchment management." Thesis, Available from the University of Aberdeen Library and Historic Collections Digital Resources. Online version available for university members only. This requires an institutional login off-campus, 2008. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?application=DIGITOOL-3&owner=resourcediscovery&custom_att_2=simple_viewer&pid=24724.
Full textHeppell, James. "Optimising plant and soil management." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/373886/.
Full textMulumba, Lukman Nagaya. "Land use effects on soil quality and productivity in the Lake Victoria Basin of Uganda." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1095711869.
Full textTitle from first page of PDF file. Document formatted into pages; contains xv, 166 p.; also includes graphics (some col.). Includes bibliographical references (p. 134-153).
Gottschalk, Pia. "Modelling soil organic carbon dynamics under land use and climate change." Thesis, University of Aberdeen, 2012. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=186643.
Full textYapa, P. I. "Soil structural quality and soil organic matter : can the level of soil organic matter be taken as an indicator in assessing soil structural quality?" Thesis, University of Reading, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.271592.
Full textWhite, Paul Mark Jr. "Enhancing soil carbon sequestration with plant residue quality and soil management." Diss., Manhattan, Kan. : Kansas State University, 2006. http://hdl.handle.net/2097/222.
Full textMartin, E. C., S. Husman, R. Wegener, P. Brown, K. Johnson, and L. Schnakenberg. "Determining Soil Moisture for Irrigation Management." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/210311.
Full textRobertson, George T., Wayne A. Robbie, Penny A. Luehring, and Steve H. Strenger. "Soil Condition Objectives for Ecosystem Management." Arizona-Nevada Academy of Science, 2003. http://hdl.handle.net/10150/296623.
Full textHabermann, Birgit. "Ways of knowing of farmers and scientists : tree and soil management in the Ethiopian Highlands." Thesis, University of Sussex, 2014. http://sro.sussex.ac.uk/id/eprint/49648/.
Full textBiscaro, 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.
Full textSilvertooth, J. C., A. Galadima, and E. R. Norton. "Residual Soil Nitrogen Evaluations In Irrigated Desert Soils, 2005." College of Agriculture, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/198203.
Full textSilvertooth, J. C., A. Galadima, and E. R. Norton. "Residual Soil Nitrogen Evaluations in Irrigated Desert Soils, 2001." College of Agriculture, University of Arizona (Tucson, AZ), 2002. http://hdl.handle.net/10150/197713.
Full textSilvertooth, J. C., A. Galadima, and E. R. Norton. "Residual Soil Nitrogen Evaluations in Irrigated Desert Soils, 2002." College of Agriculture, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/197911.
Full textSilvertooth, J. C., A. Galadima, and E. R. Norton. "Residual Soil Nitrogen Evaluations in Irrigated Desert Soils, 2003." College of Agriculture, University of Arizona (Tucson, AZ), 2004. http://hdl.handle.net/10150/198133.
Full textSilvertooth, J. C., A. Galadima, and E. R. Norton. "Residual Soil Nitrogen Evaluations in Irrigated Desert Soils, 2004." College of Agriculture, University of Arizona (Tucson, AZ), 2005. http://hdl.handle.net/10150/198175.
Full textRauton, Susannah R. W. "Soil fertility management in organic vegetable production." Connect to this title online, 2007. http://etd.lib.clemson.edu/documents/1193080187/.
Full textAlbertus, Randal Marius Colin. "The influence of different management practices on soil faunal activity in vineyard soils." Thesis, Stellenbosch : Stellenbosch University, 2002. http://hdl.handle.net/10019.1/53129.
Full textENGLISH ABSTRACT: Food demands for the ever-increasing human population is increasing the pressure on the agricultural sector to produce more food. In order to satisfy these demands, farmers are turning to chemical biocides for the control of pest species to produce greater crop yields. All pesticides must be toxic or poisonous to the target species they intend to control. Unfortunately, most pesticides are toxic or poisonous to non-target organisms as well, with detrimental effects on their health. Organic farming was developed to enhance the overall health of the farm's natural soilmicrobe- plant-animal biodiversity. No synthetic fertilisers and/or pesticides are used when farming organically. Life in the soil consists of intricate food webs and interactions between the soil dwelling invertebrates. The soil-organisms are divided into three main groups, viz., Micro-organisms (e.g. protozoa, bacteria and fungi) mesofauna (nematodes, Collembola and Acari) and macro-fauna (e.g. millipedes, isopods, insects, molluscs and earthworms). The invertebrates are very susceptible to chemical contamination by chemical biocides in natural and agro-ecosystems. The soil invertebrate communities are responsible for the decomposition of organic material in soil, thereby remineralising the soil. The decomposition processes start with comminution of the large pieces of organic material by meso- and macro-fauna and ends with the micro-fauna and microbial organisms that complete these processes by returning the nutrients in an inorganic form to the soil. The aim of this study was to investigate whether, and to what extent the soil organisms are influenced by different management practices viz., organic management practices versus conventional management practices. A vineyard on the farm Plaisir de Merle, in Simondium, Western Cape was used for the present study. One half of a one hectare vineyard was managed organically and the other half conventionally. Within each vineyard block six different treatments were performed. Three of the treatments were strictly organic and the other three were strictly conventional. Four replicates of each management treatment were performed. The bait-lamina technique was used to assess the feeding activity of the soil organisms exposed to the different management treatments. In addition to the bait-lamina trials in the vineyard itself, bait-lamina tests were performed in microcosm studies with soil from the organically and conventionally managed vineyard blocks under controlled conditions. In order to assess the impact of the various pesticides that are used in the vineyards in the conventional way, on the soil fauna, standard acute toxicity tests and behavioural tests were performed on Eisenia fetida, the compost worm. The bait-lamina tests in the vineyard revealed that the moisture content of the soil plays an important role in the biological activity of soil fauna. The different management treatments did affect the biological activity of the soil fauna, but seasonal changes also proved to be one of the important factors governing biological processes in the soil. The acute toxicity tests showed that the active ingredients (mancozeb, penconazole and trifloxystrobin) of three of the pesticides that were tested in this study, had negatively affected E. fetida at their recommended application concentrations. The remaining two pesticides' active ingredients (glyphosate and N-acetyl salicylic acid) did not affect the earthworms negatively at the recommended application concentrations. The preference behavioural trials showed that E. fetida could detect and avoid contaminated substrates at the LCso-concentrations of the different pesticides. All the earthworms were influenced positively in the preference behaviour experiments. Because of certain limitations of the bait-lamina technique, it was difficult to formulate conclusions on what happens in the soil. A possible explanation for the differences in feeding activity of soil fauna could be attributed to the migration of the soil fauna to more habitable soil horizons during the dry summer conditions, when most of the pesticides are applied. The ecological relevance of the acute toxicity tests conducted need to be investigated further. It is clear that the acute toxicity tests provided important information that should be considered, but care should be taken and the necessary safety factors be determined and considered when doing risk assessment studies. The results of the preference behaviour studies showed that for certain pesticides E. fetida can be a sensitive bioindicator of acute and/or sub-acute lethal toxicity testing but this might not necessarily be the case for other pesticides. The goal of doing laboratory studies is to gain as much information to make reliable extrapolations to field situations from laboratory data. Laboratory-to-field extrapolations are very complicated because of the physico-chemical composition of soil, the unpredictable way pesticides behave within soil and the reaction of soil organisms to the soil and to the chemical biocides that are used. Further studies need to be done in order to fully understand to what extent the soil fauna were affected by the different management practices applied to the vineyard at Plaisir de Merle.
AFRIKAANSE OPSOMMING: Voedsel aanvraag vir die toenemende menslike bevolking plaas groot druk op die landbou sektor om meer kos te produseer. Om aan die voedsel eise te voldoen, gebruik boere al meer chemiese biosiede om pesspesies te bestry. Alle pestisiede moet toksies of giftig wees vir die teiken organisme waarvoor dit bestem is. Ongelukkig is die meeste pestisiede ook toksies of giftig vir nie-teiken organismes, wat tot nadelige effekte op hul gesonheid kan lei. Organiese boerdery is ontwikkel om die algehele gesondheid van die plaas se natuurlike grond-mikrobe-plant-dier biodiversiteit te bevorder. Geen sintetiese bemestingstowwe en/of pestisiede mag gebruik word wanneer daar organies geboer word nie. Die lewe in die grond bestaan uit ingewikkelde voedselwebbe en interaksies tussen die grondlewende invertebrate. Die grond invertebrate word verdeel in drie hoof groepe, nl. mikro-organismes (bv. Protozoa, bakterieë en fungi) meso fauna (Nematoda, Collembole en Acari) en makrofauna (bv. Millipoda, Isopoda, Insecta, Mollusca en erdwurms). Die Invertebrata is die mees vatbaarste vir chemiese kontaminasie deur chemiese biosiedes in natuurlike en landbou ekosisteme. Die grond invertebraat gemeenskappe is verantwoordelik vir die afbreek van alle organiese materiaal in die grond en dus vir remineralisering van die grond. Die afbreekproses begin by die komminusie van groter stukke organiese materiaal deur die meso- en makrofauna en eindig met die mikrofauna en mikrobes wat die prosesse voltooi deur die nutriente terug te plaas in die vorm van anorganiese produkte in die grond. Die doel van hierdie studie was om te ondersoek of, en tot watter mate, grond organismes geraak word deur verskillende grondbestuurspraktyke, nl. Organiese grondbestuurspraktyke teenoor die konvensionele grondbestuurspraktyke. 'n Wingerd op die plaas Plaisir de Merle, in Simondium, Wes-Kaap, was gebruik vir die huidige studie. Een helfte van 'n een hektaar wingerd is organies bestuur en die ander helfte is op die konvensionele manier bestuur. Op elk van die twee wingerd blokke is ses verskillende behandelings toegepas. Drie van die behandelings was streng organies en die ander drie was streng konvensioneel van aard. Vier replikate van elke behandeling is toegepas op elk van die twee wingerdblokke. Die bait-lamina metode is gebruik om die voedingsaktiwiteit van die grond organismes te asses seer. As toevoeging tot die bait-lamina proewe in die wingerd self, is bait-lamina toetse ook in mikro-kosmosse in die laboratorium gedoen met grond afkomstig vanaf die twee wingerdblokke. Om die impak van die verskillende pestisiede op die grondorganismes te ondersoek, is standaard akute toksisteitstoestse en gedragstoetse uitgevoer met die komposerdwurm, Eisenia fetida. Die bait-lamina resultate in die wingerd het getoon dat die voginhoud van die grond die belangrikste rol speel wat die biologiese aktiwiteit van die grondorganismes beïnvloed. Die verskillende behandelings het die biologiese aktiwiteit van die grond fauna geaffekteer, maar seisoenale veranderings is ook uitgesonder as een van die bepalende faktore wat die biologiese prosesse in die grond stuur. Die akute toksisiteitstoetse het getoon dat die aktiewe bestandeie van drie van die pestisiede (mancozeb, penconazole en trifloxystrobin), E. fetida negatief beïnvloed het teen die aanbeveelde konsentrasies wat toegedien is. Die aktiewe bestandeie van die ander twee pestiede (glyphosate en N-asetiel sallisiel suur) het nie die erdwurms nadelig beïnvloed teen die aanbeveelde konsentrasies wat toegedien is nie. Die gedragsproewe het getoon dat E. fetida die LCso-konsentrasies van al die verskillende pestisiede kan waarneem en vermy. Al die erdwurms is positief beïnvloed in die gedragseksperimente met die verskillende pestisiede. Omdat die bait-laminametode sekere beperkings het, was dit moeilik om tot gevolgtrekkings te kom oor wat presies in die grond gebeur. 'n Moontlike verklaring vir die verskillende voedingsaktiwiteite van die grond fauna kan toegereken word aan die migrasie van die grondorganismes na meer leefbare grondhorisonne gedurende die droë somer toestande, wat toevallig met die spuit van die meeste pestisiede ooreenstem. Die ekologiese relevansie van die akute toksisiteitstoetse wat uitgevoer is, moet meer deeglik ondersoek word. Die belangrikheid van die akute toksisteitstoetse is duidelik en het waardevolle informasie gelewer, maar sorg moet geneem word, en die nodige veiligheids faktore moet bepaal word en in ag geneem word, wanneer riskobepalingstudies gedoen word. Die gedragsproewe het getoon dat vir sekere pestisiede E. fetida 'n sensitiewe bioindikator van akute en/of sub-akute letale toksisiteits toetse kan wees, maar nie noodwendig vir ander pestisiede nie. Die doel van laboratoriumstudies is om so veel as moontlik inligting te versamelom vertroubare ekstrapolasie te kan maak na situasies in die veld vanaf laboratorium data. Laboratorium-na-veld ekstrapolasies is dikwels baie gekompliseerd as gevolg van die fisies-chemiese samestelling van die grond, die onvoorspelbare manier waarop chemiese pestisiede met die grond reageer en die reaksie van die grondorganismes op chemiese biosiede in die grond. Verdere studies moet gedoen word om so deeglik maanlik die mate van die impak wat die verskillende bestuurspraktyke op die grond fauna het, te verstaan op Plaisir de Merle.
Eleki, Krisztina. "Soil management, crop rotations, and biomass removal effects on soil organic matter content." [Ames, Iowa : Iowa State University], 2007.
Find full textNing, Qiushi. "Soil Microbial Activity under Different Management Treatments in a Temperate Grassland." Thesis, Griffith University, 2017. http://hdl.handle.net/10072/368012.
Full textThesis (PhD Doctorate)
Doctor of Philosophy (PhD)
School of Natural Sciences
Science, Environment, Engineering and Technology
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Beniston, Joshua W. "Soil Organic Carbon Dynamics and Tallgrass Prairie Land Management." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1253558307.
Full textZhang, Shulan. "Soil hydraulic properties and water balance under various soil management regimes on the Loess Plateau, China /." Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/2005126.pdf.
Full textPudasaini, Madhu S., University of Western Sydney, of Science Technology and Environment College, and School of Engineering and Industrial Design. "Erosion modelling under different land use management practices." THESIS_CSTE_EID_Pudasaini_M.xml, 2003. http://handle.uws.edu.au:8081/1959.7/721.
Full textMaster of Engineering (Hons)
Suriadi, Ahmad. "Structural stability and Na-Ca exchange selectivity of soils under sugarcane trash management." Title page, Contents and Abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09ASOM/09asoms961.pdf.
Full textSakala, Godfrey Mekelani. "The effects of incorporating plant residues on soil acidity in management of tropical soils." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263047.
Full textLordan, Sanahuja Joan. "Irrigation and soil management strategies to improve fruit tree response in limiting soil conditions." Doctoral thesis, Universitat de Lleida, 2015. http://hdl.handle.net/10803/289501.
Full textLa transformación de tierras marginales, junto con un aumento de los procesos de degradación del suelo (p. ej. salinización) están trasladando la agricultura a suelos más desfavorables, lo que obliga al desarrollo de nuevas estrategias de manejo de los cultivos. Durante los últimos años se han introducido nuevas estrategias de riego, como el riego localizado enterrado (subsurface drip irrigation, SDI) o el riego deficitario controlado, a pesar de que resulta necesario evaluar su viabilidad y sostenibilidad cuando son aplicadas en suelos con propiedades físicas limitantes. Al mismo tiempo, el uso de enmiendas orgánicas y las técnicas de aireación forzada están surgiendo como métodos de recuperación de suelos a bajo coste, que podrían mejorar potencialmente el rendimiento de los cultivos en situaciones desfavorables. Es de suma importancia el estudiar los efectos de estas estrategias y técnicas sobre las propiedades del suelo, así como en la fisiología de los cultivos y su productividad, aunque también sobre parámetros de calidad de importancia creciente en el sector frutícola, como el potencial de conservación de la fruta. El objetivo general de esta tesis fue el de evaluar diferentes estrategias de manejo de suelo y riego, y estudiar sus efectos en plantaciones de melocotón y nectarina en suelos con condiciones físicas limitantes.
Transformation of marginal land along with an increase of soil degradation processes (e.g. salinization) is moving the agriculture into more unfavorable soils, forcing the development of new management strategies. Subsurface drip irrigation (SDI) and deficit irrigation strategies have been widely studied although it is necessary to evaluate their feasibility and sustainability when applied in soils with limiting physical properties. At the same time, organic soil amendments and oxygation techniques are arising as low-cost soil reclamation methods that could potentially improve the crop performance under such situations. It is of paramount importance to study the effects of these strategies and techniques on soil properties as well as on crop physiology and productivity, but also on some quality parameters of growing importance in the fruit sector, such as fruit storability. The general aim of this thesis was to assess various soil management and irrigation strategies and study their effects on peach and nectarine orchards under limiting soil conditions.
Tao, Hsiao-Hang. "Crop residue management in oil palm plantations : soil quality, soil biota and ecosystem functions." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:ebcc3bd9-45c0-4d22-9fef-71dff4abecd3.
Full textViscarra, Rossel Raphael A. "Development of a Proximal Soil Sensing System for the Continuous Management of Acid Soil." Thesis, The University of Sydney, 2001. http://hdl.handle.net/2123/674.
Full textViscarra, Rossel Raphael A. "Development of a Proximal Soil Sensing System for the Continuous Management of Acid Soil." University of Sydney. Agricultural Chemistry and Soil Science, 2001. http://hdl.handle.net/2123/674.
Full textFrancos, Quijorna Marcos. "Wildfire and forest management effects on soil properties." Doctoral thesis, Universitat de Barcelona, 2019. http://hdl.handle.net/10803/666948.
Full textEls incendis forestals son un fenomen comú en l’ecosistema Mediterrani. En relació a aquests incendis, les condicions meteorològiques post-incendi i la gestió forestal prèvia i posterior al incendi poden arribar a causar danys irreversibles en el sistema sòl. Aquesta tesi tracta de trobar l’impacte de les diferents gestions forestals en les propietats físiques, químiques i microbiològiques d’un sòl després d’un incendi forestal. De vegades, prèviament a un incendi forestal, les zones han estat gestionades. L’efectivitat d’aquesta gestió arriba fins a deu anys després d’haver estat portada a terme, passat aquest lapse de temps deixa de ser efectiva en cas d’incendi. Les condicions meteorològiques posteriors a l’incendi son extremadament importants ja que permetran la incorporació, o no, de les cendres produïdes durant l’incendi. Entre els resultats trobats en aquest estudi podem apuntar que inclús en condicions de fortes precipitacions, just després d’un incendi forestal, a les zones on el pendent es escàs o nul, les cendres tenen una capacitat de incorporar-se en el sòl. En els casos en els que es d’extrema necessitat portar-se a terme la gestió forestal, aquesta ha de realitzar-se d’una manera manual evitant utilitzar maquinària pesada. Un altre factor molt important a tenir en compte després de l’incendi és la severitat del foc resultant en diferències a llarg termini en les propietats del sòl. En aquestes zones, el que si que es recupera, és una densa cobertura vegetal que incrementa el risc d’incendi. Per a evitar aquesta situació, és necessari portar a terme una gestió forestal entre el mitjà- i el llarg- termini després de l’incendi per a disminuir el risc d’incendi forestal i disminuir la densitat vegetal i intentar facilitar que el sòl podi recuperar les seves condicions òptimes. Aquesta gestió entre el mitjà- i el llarg- termini després d’un incendi forestal és necessària i ha de portar-se a terme de manera sostenible amb l’objectiu de preservar les condicions del sòl i que aquest es trobi en òptimes condicions de cara a futurs incendis.
Los incendios forestales son un fenómeno común en el ecosistema Mediterráneo. Estos incendios, las condiciones meteorológicas post-incendio y la gestión forestal previa y posterior al incendio pueden llegar a causar daños irreversibles en el sistema suelo. Esta tesis trata de hallar el impacto de diferentes gestiones forestales en las propiedades físicas, químicas y microbiológicas de un suelo después de un incendio forestal. En ocasiones, previamente a un incendio forestal, las zonas han sido gestionadas. La efectividad de esta gestión alcanza hasta diez años después de haber sido realizada, pasado ese lapso de tiempo deja de ser efectiva en caso de incendio. Las condiciones meteorológicas posteriores al incendio son extremadamente importantes ya que permitirán la incorporación, o no, de las cenizas producidas durante el incendio. Entre los resultados encontrados en este estudio podemos apuntar que incluso en condiciones de fuertes precipitaciones justo después de un incendio forestal, en las zonas donde la pendiente es escasa o nula, las cenizas tienen la capacidad de incorporarse en el suelo. En los casos en los que es de extrema necesidad llevar a cabo la gestión forestal, ésta debe realizarse de manera manual evitando usar maquinaria pesada. Otro factor muy importante a tener en cuenta después de un incendio es la severidad del fuego resultando en diferencias a largo plazo en las propiedades del suelo. En estas zonas, lo que sí se recupera, es una densa cobertura vegetal que incrementa el riesgo de incendio. Para evitar esta situación, es necesario llevar a cabo una gestión forestal entre el medio- y el largo-plazo después del incendio para disminuir el riesgo de incendio forestal y disminuir la densidad vegetal e intentar facilitar que el suelo pueda recuperar sus condiciones óptimas. Esta gestión entre el medio- y el largo-plazo después de un incendio forestal es necesaria y debe llevarse a cabo de manera sostenible con el fin de preservar las condiciones del suelo y que éste se encuentre en óptimas condiciones de cara a futuros incendios.
Nikkami, Davood. "Optimizing the management of soil erosion using GIS." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0025/NQ43582.pdf.
Full textSankey, Joel Brown. "Modeling Soil Water Content for Precision Range Management." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/sankey/SankeyjJ1205.pdf.
Full textStendahl, Johan. "Spatial aspects of forest and forest soil management /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-6083-2.pdf.
Full textSilvertooth, J. C. "Saline and Sodic Soil Identification and Cotton Management." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2001. http://hdl.handle.net/10150/147010.
Full textChowdhury, Md Tanvir Ahmed. "Arsenic in Bangladeshi soils related to physiographic regions, paddy management and geochemical cycling." Thesis, University of Aberdeen, 2016. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=231266.
Full textPudasaini, Madhu Sudan. "Erosion modelling under different land use management practices." View thesis, 2003. http://library.uws.edu.au/adt-NUWS/public/adt-NUWS20040401.140345/index.html.
Full textBottoms, Emily L. "Soil greenhouse gas emissions and soil C dynamics in bioenergy crops." Thesis, University of Aberdeen, 2012. http://digitool.abdn.ac.uk:80/webclient/DeliveryManager?pid=194783.
Full textWatson, J., S. Winans, and M. Sheedy. "Nitrogen Management BMPs Parker Valley Demonstration." College of Agriculture, University of Arizona (Tucson, AZ), 1995. http://hdl.handle.net/10150/210297.
Full textAzola, Anthony. "The Effect of Management on Erosion of Civil War Battlefield Earthworks." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/31254.
Full textMaster of Science
Morgan, Marcus John. "Optimal prediction of coastal acid sulphate soil severity using geographic information systems." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20070208.153133/index.html.
Full textCooper, Sophie E. "The role of conservation soil management on soil and water protection at different spatial scales." Thesis, Cranfield University, 2006. http://hdl.handle.net/1826/1775.
Full textSunohara, Mark Douglas. "Soil microstructure and soil erodibility at IBSRAM Sloping Lands management sites in south-east Asia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ36876.pdf.
Full textWright, Nordely. "Evaluation of the effects of an orange-oil based soil ameliorant on soil water management." Thesis, Stellenbosch : Stellenbosch University, 2013. http://hdl.handle.net/10019.1/79838.
Full textENGLISH ABSTRACT: Soil amelioration and conditioning is desirable and in many cases essential, due to increasing food demand and the deterioration and exhaustion of soils. A new soil ameliorant, consisting of orange oil as a base and a mixture of surfactants, is on the global agricultural market. Use of this soil ameliorant by farmers has made an impact on crop production and plant growth on many farms. The effects of this soil ameliorant on selected soil properties as well as plant traits were evaluated by a field trial, a pot trial and a Water Characteristic Curve experiment. A field trial was performed in the Firgrove area near Somerset West, Western Cape (South Africa). It entailed the evaluation of the water content and lateral movement of water in a sandy soil after the application of the soil ameliorant. The field was already planted with Capsicum annuum crop at the initiation of the trial. The trial was performed in a drip irrigated field by taking soil water measurements using a Diviner 2000 probe over a nine week period. The trial showed significant increases in water content on the plots treated with the soil ameliorant. These increases are indicative of an increase in the lateral movement of the soil water, as the measurements were taken between two drippers. On average, the ameliorant treated soil had 17% higher water content than that of the control. A Water Characteristic Curve (WCC) experiment was conducted, which entailed establishing the WCC for a sandy soil treated with the soil ameliorant. The Sandbox apparatus, from Eijkelkamp Agrisearch Equipment, was used to perform the experiment and provides suction values of 0.1 to 10.1 KPa. The WCC showed that the ameliorant application increased water retention over all suctions, especially for the 10 l/ha ameliorant application. This substantiated the Field trial where water retention was increase in a sandy soil. A pot trial was performed in a greenhouse to evaluate the effect of the soil ameliorant on selected soil properties and certain plant traits. This experiment consisted of an ameliorant treatment and a control with a combination of four different Plant Available Water Depletion (PAWD) regimes namely, 10% depletion, 50% depletion, 80% depletion and 50%C depletion, where “C” refers to covered. The trial layout, with five single pot replicates per treatment combination, was according to a randomized block design. The surface covering of one of the 50% PAWDs was a plastic sheet which to prevent evaporation from the soil surface. The ameliorant treatment resulted in significant improvements in overall plant growth, total biomass production, especially dry root biomass. Leaf Area Index and plant height were also improved. The Biomass Water Use Efficiency was improved with the ameliorant application, especially for the 50%C PAWD illustrating the beneficial use of a mulch. Bulk density was decreased with application of the ameliorant but this difference was not statistically significant. Aggregate stability for the moist soils (10% and 50%C PAWD) was significantly improved with the ameliorant application. The application of this soil ameliorant made significant improvements in various facets of plant growth and certain soil physical properties. Especially water holding capacity in sandy soils and the overall improvement in plant growth. There is still much opportunity for research in this field and many questions remain, especially those pertaining to the mechanisms involved in the workings of a soil ameliorant containing a mixture of ingredients.
AFRIKAANSE OPSOMMING: Die bestuur van besproeingswater en die optimisasie van gewasproduksie is `n studieveld wat baie aandag verg, aangesien varswater bronne bedreig word. As gevolg van die stygende vraag na voedsel en die agteruitgang en uitputting van die grond, is grondverbetering en-kondisionering aanbeveelbaar en in sommige gevalle noodsaaklik. `n Nuwe grond verbeteraar, bestaande uit lemoen olie as `n basis en ‘n mengsel van benattingsmiddels, is beskikbaar op die wêreld landbou mark. Die gebruik van die grondverbeteraar deur boere het ‘n impak gemaak op gewasproduksie en plantegroei op baie plase. Die effek van die grondverbeteraar op geselekteerde grond-eienskappe sowel as plantkenmerke is geevalueer deur ‘n veld proef, ‘n pot proef en ‘n Water Karakeristieke Kurwe eksperiment. `n Veldproef is uitgevoer in die Firgrove omgewing naby Somerset Wes in die Wes-Kaap Provinsie, Suid Afrika. Die veldproef het die evaluasie van die grondwater inhoud en die laterale beweging van water in `n sanderige grond behels. Die gewas Capsicum annuum was alreeds in die veld aangeplant voor die begin van die proef. Die proef was uitgevoer in `n drup besproeide veld deur grondwater metings wat geneem is met `n Diviner 2000 peilstif oor `n periode van nege weke. Die proewe het `n beduidende verhoging in die groundwater-inhoud getoon waar die grond met die grondverbeteraar behandel is. Die verhogings was `n aanduiding van `n toename in die laterale vloei van grond water, aangesien die lesings tussen twee druppers geneem is. Die grond, wat met die grondverbeteraar behandel is, het gemiddeld 17% hoёr groundwater-inhoud gehad as die kontrole. `n Water Karakteristieke Kurwe (WKK) eksperiment is uitgevoer, wat bestaan het uit die opstel van die WKK vir `n sanderige grond behandel met die grondverbeteraar. Die “Sandbox” apparaat van Eijkelkamp, Agrisearch Equipment is gebruik wat negatiewe druk waardes van 0.1 tot 10.1 KPa toon. Die WKK het getoon dat die toediening van die grondverbeteraar die water retensie verhoog het oor al die drukke, veral in die 10 l/ha toediening. Dit staaf die resultate van die Veld eksperiment waar water retensie verhoog is in die sanderige grond. Die pot-eksperiment is uitgevoer in `n tonnel om die effek van die grondverbeteraar op geselekteerde grond eienskappe en verskeie plant eienskappe te evalueer. Die eksperiment het bestaan uit ‘n grondverbeteraar behandeling en ‘n kontrole met ‘n kombinasie van vier verskillende plantbeskikbare wateronttrekkings naamlik, 10%, 50%, 80% onttrekking, en ‘n 50%C onttrekking, waar “C” verwys na “covered”. Die proef uiteensetting, met vyf enkel pot herhalings per behandeling kombinasie was volgens ‘n ewekansig blok uitleg. Die oppervlakte dekking van 50%C plantbeskikbare waterottrekking was `n 60 μm plastiek-vel wat verdamping vanaf die grondoppervlak verhoed het. Die grondverbeteraar behandeling het `n beduidende verbetering in algehele plantgroei, totale biomassa produksie en spesifiek droё wortel biomassa getoon. Die blaararea indeks en planthoogte het ook `n verbetering getoon. Die biomassa-watergebruiksdoeltreffendheid het verbeter met die toediening van die grondverbeteraar, spesifiek vir die 50%C plantbeskikbarewaterottrekking wat die voordele van die gebruik van oppervlakdekking illustreer. Die brutodigtheid is verminder deur die toediening van die grondverbeteraar, maar die verskil was statisties nie wesenlik nie. Agregaat-stabiliteit vir die grond met `n hoёr vogregime (10% en 50%C plantbeskikbare waterottrekking) is wesenlik verbeter met die toediening van die grondverbeteraar. Die toediening van die grondverbeteraar het wesenlike verbeteringe in verskeie plantegroei- en grondfisiese-eienskappe getoon. Spesifiek laterale beweging in sanderige grond en die verbettering van algehele plantegroei. Daar is nog baie geleenthede vir navorsing in die veld en baie vrae bly onbeantwoord, veral in verband met die meganismes met bretrekking tot die werking van die grondverbeteraar wat uit `n mengsel van bestandele bestaan.
Dittmer, Kyle Michael. "Mitigating Gaseous Nitrogen and Carbon Losses from Northeastern Agricultural Soils via Alternative Soil Management Practices." ScholarWorks @ UVM, 2019. https://scholarworks.uvm.edu/graddis/1161.
Full textMoloto, K. P. "The potential of sustainable agricultural practices to enhance soil carbon sequestration and improve soil quality." Thesis, Stellenbosch : University of Stellenbosch, 2010. http://hdl.handle.net/10019.1/4257.
Full textENGLISH ABSTRACT: Sustainable agricultural management practices have a profound impact on soil carbon sequestration. The amount of carbon that can be stored in a given soil is influenced by climate, soil type, and the quality and quantity of organic inputs. Together, the interactive effect of these factors determines the Soil Organic Content (SOC). Sustainable agricultural management practices influencing Soil Organic Matter (SOM) include application of organic amendments, conservation tillage, and use of cover crops, crop rotations, crop residue management, and nutrient management. Increasing SOC enhances soil quality, reduces soil erosion, and increases agricultural productivity with considerable on-farm and off-farm benefits. To assess how management practices affect SOC, two case studies were conducted in Yavatmal district of Maharashtra in India and Lynedoch near Stellenbosch. The first case study examined the differences in SOC content on four farms each managed with 13 different sustainable agricultural techniques and one farm managed under conventional management practices. The second case study investigated the SOC differences between an organic and a conventional vegetable farm. The results of both studies show that farms that are managed under sustainable agricultural practices generally contain higher SOC content than farms that are managed under conventional agricultural practices.
AFRIKAANSE OPSOMMING: Om te bepaal hoe bestuurspraktyke Grondlikke Organise Koolstoff raak, is twee gevallestudies in die distrikte Yavatmal in Maharashtra, Indië, en Lynedoch buite Stellenbosch uitgevoer. Die eerste gevallestudie het die verskille in Grondlikke Organise Koolstoff -inhoud bekyk op vier plase waar 13 verskillende Volhoubare landboubestuurspraktyke het ‟n diepgaande impak op grondkoolstof-beslaglegging. Die hoeveelheid koolstof wat binne gegewe grond gestoor kan word, word deur klimaat, grondsoort en die gehalte en hoeveelheid organiese toevoer beïnvloed. Saam bepaal die interaktiewe effek van vermelde faktore die Grondlikke Organise Koolstoff -inhoud. Volhoubare landboubestuurspraktyke wat Grondlikke Organise Materiaal beïnvloed, sluit in die toediening van organiese verbeterings, bewaringsgrondbewerking, die gebruik van dekkingsoeste, oesrotasies, die hantering van oesresidu en voedingstofbestuur. Vermeerdering van Grondlikke Organise Koolstoff verhoog grondgehalte, verminder gronderosie en vermeerder landbouproduktiwiteit met aansienlike voordele op en verwyderd van die plaas. volhoubare landboutegnieke in die bestuurproses toegepas word, en een plaas wat volgens konvensionele bestuurspraktyke bedryf word. Met die tweede gevallestudie is ondersoek gedoen na die Grondlikke Organise Koolstoff -verskille tussen ‟n organiese en ‟n konvensionele groenteplaas. Die uitslae van albei studies dui daarop dat plase wat volgens volhoubare landboupraktyke bestuur word oor die algemeen hoër Grondlikke Organise Koolstoff-inhoud aantoon in vergelyking met plase wat volgens konvensionele landboupraktyke bedryf word.
Martin, E. C., K. O. Adu-Tutu, W. B. McCloskey, S. H. Husman, P. Clay, and M. Ottman. "Reduced Tillage Effects on Irrigation Management in Cotton." College of Agriculture, University of Arizona (Tucson, AZ), 2003. http://hdl.handle.net/10150/197914.
Full textWalworth, James. "Soil Sampling and Analysis." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2006. http://hdl.handle.net/10150/144813.
Full textSoil testing is comprised of four steps: Collection of a representative soil sample, laboratory analyses of the soil sample, interpretation of analytical results, and management recommendations based on interpreted analytical results.
Walworth, J. L. "Soil Sampling and Analysis." College of Agriculture and Life Sciences, University of Arizona (Tucson, AZ), 2011. http://hdl.handle.net/10150/239610.
Full textGumbert, Amanda A. "INFLUENCE OF RIPARIAN BUFFER MANAGEMENT STRATEGIES ON SOIL PROPERTIES." UKnowledge, 2013. http://uknowledge.uky.edu/pss_etds/27.
Full textTsang, Jennifer Arr, and 曾昭雅. "Dioxin contamination in soil: remediation technology and environmental management." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2003. http://hub.hku.hk/bib/B31255644.
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