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Rozprawy doktorskie na temat „Agricultural fields and nurseries”

Autor: Grafiati

Data publikacji: 5 czerwca 2025

Data aktualizacji: 1 sierpnia 2025

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1

Spekken, Mark. "Creating optimized machine working patterns on agricultural fields." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11152/tde-22092015-112051/.

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In the current agricultural context, agricultural machine unproductivity on fields and their impacts on soil along pathways are unavoidable. These machines have direct and indirect costs associated to their work in field, with non-productive time spent in manoeuvres when these are reaching field borders; likewise, there is a double application of product when machines are covering headlands while adding farm inputs. Both issues aggravate under irregular field geometry. Moreover, unproductive time can also appear in operations of loading/offloading the machine\'s reservoir with inputs/harvested

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Maggiotto, Selma Regina. "Fluxes of oxidized nitrogen gases from fertilized agricultural fields." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ56287.pdf.

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Rye, Timothy A. "Long-term functional trait dynamics in abandoned agricultural fields /." View online, 2008. http://repository.eiu.edu/theses/docs/32211131428174.pdf.

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Simard, Guillaume. "Monitoring and simulation of nutrient transport from agricultural fields." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98799.

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In the Missisquoi Bay of Lake Champlain situated in the South of Quebec, phosphorus originating from agricultural sources has been found to be a major contributor to the deterioration of water quality. This study sought to evaluate the nutrient loads, most particularly phosphorus, exported through surface runoff and tile drainage from two agricultural fields of the Missisquoi Bay watershed. As part of the study, a phosphorus simulation model was tested on one agricultural field. The evaluation of FHANTM 2.0 assessed the model's capacity to simulate the transport of phosphorus on agricultural f

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Pease, Jessica Erin. "Innovative Approaches for Addressing Concentrated Flow in Agricultural Fields." OpenSIUC, 2013. https://opensiuc.lib.siu.edu/theses/1315.

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Riparian buffers are a commonly utilized best management practice (BMP) for mitigating non-point source pollution from agricultural fields. This practice is most effective when runoff enters the buffer as sheet flow. However runoff from becomes concentrated and forms concentrated flow paths (CFPs) breaking through the buffer in critical erosional areas. These critical areas can be determined prior to the implementation of a BMP such as a riparian buffer through incorporation of the Revised Universal Soil Loss Equation (RUSLE) with Geographic Information Systems (GIS). This approach utilizes fi

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6

Sizemore, Grant. "Foraging quality of flooded agricultural fields within the Everglades Agricultural Area for wading birds (Ciconiiformes)." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0041288.

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7

Nkongolo, Nsalambi Vakanda. "Quantification of greenhouse gas fluxes from soil in agricultural fields." Thesis, Nelson Mandela Metropolitan University, 2010. http://hdl.handle.net/10948/1474.

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Field studies were conducted at Lincoln University of Missouri (USA) and Hokkaido University (Japan) to: (i) study the relationships between greenhouse gases emissions and soil properties, (ii) assess the influence of agricultural practices on greenhouse gas fluxes and soil properties and (iii) improve the quantification of greenhouse gases from soil in agricultural fields using geospatial technologies. Results showed that besides soil temperature (T), soil thermal properties such as thermal conductivity (K), resistivity (R) and diffusivity (D) and soil pore spaces indices such as the pore tor

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Gollamudi, Apurva. "Hydrological and water quality modeling of agricultural fields in Quebec." Thesis, McGill University, 2006. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=98710.

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Two tile-drained agricultural fields in the Pike River watershed of Southern Quebec were instrumented in October 2000 to monitor phosphorus and nitrate concentrations in surface runoff and tile drainage. Data collected from these sites were used as the primary input to test a GIS-based hydrological and water quality simulation model (ArcView SWAT2000) at the field scale. Surface runoff, subsurface flow, sediment yield, nitrate loads and phosphorus loads were the principal parameters evaluated by the model. The SWAT model was calibrated using data collected in the year 2002 while 2003 data was

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9

Chen, Yu. "Development of an Intelligent Sprayer to Optimize Pesticide Applications in Nurseries and Orchards." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1290526778.

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Bourke, Simone. "Measured and simulated water balances for agricultural fields under water table management." Thesis, McGill University, 2012. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=107741.

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In southern Quebec, uncertain rainfall and weather patterns can be detrimental to crop growth even though fresh water is an abundant resource. It is therefore desirable to have a good understanding of the water fluxes that occur in the soil profile of a drained agricultural field. Performing a soil water balance is a way to determine the water uses and losses within the soil profile. A seasonal study conducted in 2010 on a 4.2 ha agricultural field in Saint Emmanuel, Quebec aimed to quantify the water fluxes due to both lateral and vertical seepage in conventional (FD) and controlled drainage/

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Menkis, Audrius. "Root associated fungi of conifer seedlings and their role in afforestation of agricultural land /." Uppsala : Dept. of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, 2005. http://epsilon.slu.se/2005106.pdf.

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12

Rydberg, Anna. "Multispectral image analysis for extraction of remotely sensed features in agricultural fields /." Uppsala : Centre for Image Analysis, Swedish Univ. of Agricultural Sciences (Centrum för bildanalys, Sveriges lantbruksuniv.), 2001. http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&doc_number=009768972&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA.

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13

Blocker, Jason E. "MODELING NUTRIENT TRANSPORT FROM AGRICULTURAL FIELDS FERTILIZED WITH SEWAGE SLUDGE, MAUMEE RIVER BASIN." Bowling Green State University / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=bgsu1178739262.

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14

Jamieson, Andrew 1976. "Evaluating phosphorus losses in surface and subsurface runoff from two agricultural fields in Quebec." Thesis, McGill University, 2001. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=33784.

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Phosphorous concentrations exceed water quality guidelines in most of the major rivers in southern Quebec. The problem is particularly acute in the Pike River, which drains into the Missisquoi Bay of Lake Champlain, in southeastern Quebec. Elevated phosphorus concentrations can lead to a reduction in the palatability of drinking water, a decrease in diversity of aquatic life and loss of recreational opportunities. All of these problems have been observed in the Bay.<br>Two agricultural fields (the Marchand and Gagnon sites) located on the Pike River watershed, in southeastern Quebec were selec

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15

Lopez, Barrera Wilson Emiliano. "Hispanics Immigrants on the Fields: Is Discrimination a Barrier to Get Non-Agricultural Jobs?" Thesis, North Dakota State University, 2016. https://hdl.handle.net/10365/28288.

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This research presents evidence supporting the existence of differences in treatments received by Hispanics job-seekers on agricultural and non-agricultural labor markets found through an experimental labor market. Hispanics males? productivity predicted by agricultural employers was higher than the predicted by non-agricultural employers, suggesting that Hispanics males are believed to fit better in agricultural activities. This may imply an invisible barrier preventing Hispanics to access non-agricultural jobs. Employers? beliefs reactions to a more informative signal related to productivity

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16

Jiang, Yitong. "Identification of Sewage Sludge Injection Application on Harvested Agricultural Fields Using Landsat TM Data." University of Toledo / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1290201856.

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17

Brickle, Nicholas W. "The effect of agricultural intensification on the decline of the Corn Bunting, Miliaria calandra." Thesis, University of Sussex, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287184.

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18

Opatovsky, Itai. "The Influence of agricultural fields on the spider assemblage in nearby natural semi-arid habitats /." [Sedeh Boker, Israel] : Ben-Gurion University of the Negev, 2008. http://aranne5.lib.ad.bgu.ac.il/others/OpatovskyItai.pdf.

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Ampontuah, Emmanuel Osei. "Model input resolution effects on the prediction of sediment and nutrient transport from agricultural fields." Thesis, University of Reading, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.433462.

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20

Castellazzi, M. S. "Spatio-temporal modelling of crop co-existence in European agricultural landscapes." Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/3747.

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The environmental risk of growing genetically modified (GM) crops and particularly the spreading of GM genes to related non-GM crops is currently a concern in European agriculture. Because the risks of contamination are linked to the spatial and temporal arrangements of crops within the landscape, scenarios of crop arrangement are required to investigate the risks and potential coexistence measures. However, until recently, only manual methods were available to create scenarios. This thesis aims to provide a flexible referenced tool to create such scenarios. The model, called LandSFACTS, is a

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21

Langlois, Jacques. "Nutrient and sediment movements from soil to surface water in a forested watershed and two agricultural fields." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=19751.

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In North America, the acceleration of the eutrophication of surface waters due to nutrient pollution is still present. Soil studies have not entirely succeeded in linking nutrient and sediment losses to field hydrology because relationships between discharge and dissolved ions/sediments are complicated by a hysteresis effect which has been only described qualitatively. The objective of this thesis was to better understand the effects of hydrology on N, P, and sediment transfer from agricultural and forest soils to surface waters. This was done by developing a technique, called the H index, to

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22

Jennings, Melanie S. "Writing from the fields : dust bowl Okie literature /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2000. http://wwwlib.umi.com/cr/ucsd/fullcit?p9975041.

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Budech, Keiko A. "Missing Voices, Hidden Fields: The Gendered Struggles of Female Farmworkers." Scholarship @ Claremont, 2014. http://scholarship.claremont.edu/pitzer_theses/54.

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Known for its fertile soil and ideal climate, California has been one of the most agriculturally productive areas in the world. Often left out of this picture are the farmworkers who make it possible. Within this farmworker community, females are a sub-class that has been even more marginalized. This thesis investigates the gendered aspects of fieldwork and exposes female leadership working towards changing these specific struggles, such as sexual harassment in the fields, domestic abuse, pesticide exposure, and the perpetuation of submissive gender roles in the household and workplace. An in-

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24

Choquette, Carolyne. "Evaluating management practices to limit phosphorus losses from agricultural fields in the Castor watershed using the WEND model." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=81612.

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The objective of this study was to apply the WEND model, a nutrient mass balance model, to the Castor watershed in southern Quebec to evaluate phosphorus movement, storage and export over time. The WEND model was customized to run on a field-scale and then individually applied to 266 fields on the watershed for a 30-year simulation period. Field-specific information for the period of 1997-1999, was used as basic inputs to the model. Climatic information was obtained from local sources. The additional information required to run the model was derived from the literature. Model outputs we

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25

Mukherjee, Sandipan. "On the estimation of nitrous oxide flux from agricultural fields of Canterbury New Zealand using micro-meteorological methods." Thesis, University of Canterbury. Department of Geography, 2013. http://hdl.handle.net/10092/8454.

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Traditionally, agricultural nitrous oxide (N₂O) emission of New Zealand has been measured using chambers or lysimeters, and micrometeorological flux measurement experiments have been very few. Since micrometerological flux measurement systems have the advantage of measuring spatially integrated flux values for longer time periods compared to measurements made using chambers, development and verification of such a system was needed for New Zealand's agro-meteorological conditions. In this study, efficacy of such a combined flux gradient (FG) - eddy covariance (EC) micrometeorological flux measu

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Fraser, Andrew Ian. "Towards a systematic framework for quantifying and extrapolating diffuse phosphorus transfer from agricultural fields to the national scale." Thesis, Cranfield University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444470.

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Lang, Marion [Verfasser], Harald [Akademischer Betreuer] Albrecht, Hanno [Gutachter] Schäfer, Christoph [Gutachter] Leuschner, and Harald [Gutachter] Albrecht. "Reintroduction of rare arable plants on agricultural fields / Marion Lang ; Gutachter: Hanno Schäfer, Christoph Leuschner, Harald Albrecht ; Betreuer: Harald Albrecht." München : Universitätsbibliothek der TU München, 2021. http://d-nb.info/1237815894/34.

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28

Öberg, Sandra. "Spiders in the agricultural landscape : diversity, recolonisation, and body condition /." Uppsala : Dept. of Ecology, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200725.pdf.

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Van, Zandvoort Alisha. "The Effect of Control Tile Drainage on Soil Greenhouse Gas Emissions from Agricultural Fields in the South Nation Watershed of Ontario." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/34567.

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Controlled tile drainage (CTD) is an agricultural management practice with well-documented water quality and agronomic benefits, however, by virtue of its effect upon soil hydrology, CTD could potentially impact soil greenhouse gas (GHG: CO2, CH4, N2O) emissions. This study aimed to determine whether: (1) CTD affects soil GHG emissions throughout a dry (2012) and a wet (2013) growing season for corn, soybean, and forage fields in eastern Ontario, and (2) the location in a field with respect to a tile drain (over tile (OT) versus between tile (BT)) is important in GHG emissions. Non-steady stat

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Durham, Emily Kilpatrick. "Moderate Electric Field Treatment for Saccharification of Cellulosic Materials." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1431082825.

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Mok, Jin Hong. "Nonthermal Inactivation of Bacteria in Liquids Using a Combination of Mechanical Shear and Moderate Electric Fields." The Ohio State University, 2019. http://rave.ohiolink.edu/etdc/view?acc_num=osu1555609969589384.

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Clough, Yann. "Local and large scale determinants of biodiversity in winter wheat fields." Doctoral thesis, [S.l.] : [s.n.], 2006. http://webdoc.sub.gwdg.de/diss/2006/clough.

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Scherr, Frank. "Sorption, degradation and transport of estrogens and estrogen sulphates in agricultural soils." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1017.

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The fate and behaviour of estrogens in the environment are of concern due to the compounds’ endocrine disruption potential. Estrogens, namely 17β-estradiol (E2), estrone (E1), and estrogen sulphates, i.e. 17β-estradiol-3-sulphate (E2-3S) and estrone-3-sulphate (E1-3S) excreted by livestock constitute a potential source for estrogen contamination in the environment. A method was developed to separate and quantify the hormones by high-performance-liquid-chromatography (HPLC) and ultraviolet detection (UV). A combination of dichloromethane (DCM) and dicyclohexylamine hydrochloride (DCH·HCl) gave

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Turner, Susan Jane. "Microbiological Indicators of Faecal Contamination in Aquatic Environments." Thesis, University of Auckland, 1996. http://hdl.handle.net/2292/2375.

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1. The aim of this research was to determine appropriate microbial indicator systems for use in monitoring the occurrence and source of faecal contamination in aquatic environments. Particular emphasis has been placed on the identification of indicators which might enable faecal contamination of human origin to be distinguished from that of non-human derivation. Two lines of investigation have been pursued; the use of alternative microbial indicator systems for water quality monitoring, and the development of diagnostic molecular methods for identifying the origin of faecal organisms. 2. Field

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Armengot, Martínez Laura. "La flora arvense dels conreus cerealístics de secà: efectes de la intensificació agrícola - Weed diversity of dryland cereal fields: effects of agricultural intensification." Doctoral thesis, Universitat de Barcelona, 2010. http://hdl.handle.net/10803/32110.

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La intensificació agrícola que s'ha produït al llarg de les darreres dècades ha fet possible un augment de la producció. Aquesta intensificació, però, ha ocasionat greus conseqüències pel medi, entre les que destaca, la pèrdua de biodiversitat. La pèrdua de diversitat d'espècies arvenses és un dels problemes més rellevants perquè tenen un paper clau en el funcionament dels sistemes agrícoles. La intensificació agrícola s’ha produït a diferents escales espacials. A escala de paisatge, l’agregació de parcel•les i la reducció dels hàbitats associats als conreus a causa de la concentració parcel•l

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36

Bellmore, Rebecca Anne. "Hydrologic dynamics control dissolved organic matter export from watersheds| Fields-scale processes in a small, artificially drained agricultural catchment, and patterns across ecosystems." Thesis, Washington State University, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3684751.

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<p>Dissolved organic matter (DOM) is an important component of nutrient cycling and energy transfer within and between ecosystems. Understanding controls over the magnitude and quality of DOM that is transferred from soils to surface water is needed to better characterize the terrestrial-aquatic carbon flux and effects of terrestrial DOM on downstream ecosystems. A meta-analysis of the response of in-stream dissolved organic nitrogen concentration (DON) to high flow events indicates that DON typically increases with flow across a wide range of ecosystem types, likely as novel DOM sources in th

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Menelik, G. "Leaching and denitrification losses of nitrogen from corn fields as influenced by conventional- and no-till practices in soils of the Chesapeake Bay area." Diss., Virginia Tech, 1990. http://hdl.handle.net/10919/39944.

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Nilsson, Ola. "Hackerör på Sydsvenska höglandet : vad skiljer röjningsröseområden från celtic fields, stensträngsområden och bandparcellområden?" Thesis, Gotland University, Department of Archeology and Osteology, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hgo:diva-294.

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<p>From the pre-Roman and Roman Iron Age, a number of different fossil agrarian landscapes can be found in southern Sweden - clearance cairn areas, celtic fields, stone-wall complexes and geometrically laid-out strip fields. With two different comparative analyses, this paper tries to explain some of the differences between clearance cairn systems and the other fossil field systems</p><p>The shape of the early Iron Age agrarian landscape varies between different provinces of southern Sweden. At Gotland, celtic field systems were laid-out before 500 BC. In Småland at the same time, areas with c

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Waheed, Tahir. "Artificial intelligence analysis of hyperspectral remote sensing data for management of water, weed, and nitrogen stresses in corn fields." Thesis, McGill University, 2005. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=86060.

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This study investigated the possibility of using ground-based remotely sensed hyperspectral observations with a special emphasis on detection of water, weed and nitrogen stresses contributing towards in-season decision support for precision crop management (PCM).<br>A three factor split-split-plot experiment, with four randomized blocks as replicates, was established during the growing seasons of 2003 and 2004. Corn (Zea mays L.) hybrid DKC42-22 was grown because this hybrid is a good performer on light soils in Quebec. There were twelve 12 x 12m plots in a block (one replication per tr

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40

Zhou, Shuang. "EVALUATING SOIL PHYSICAL AND CHEMICAL PROPERTIES FOLLOWING ADDITION OF NON-COMPOSTED SPENT COFFEE AND TEA FOR ATHLETIC FIELDS." UKnowledge, 2017. https://uknowledge.uky.edu/pss_etds/96.

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Physical and chemical properties of non-composted spent coffee (CF) and tea (T) suggest they may have applications as soil amendments for improving poor soils. Studies were conducted to determine 1) the effect of amendments on grass growth and soil properties, 2) the effect of incorporation versus surface application of amendments on soil properties, and 3) the effect of amendment application frequency on grass growth and soil properties. In the first study, amendments were mixed with sand and planted to bermudagrass. Treatments included CF, T, and peat moss (PM) mixed with sand, and 100% sand

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Muir, Paul David. "Studies on the growth and compositional development of antlers in red deer (Cervus elaphus)." Lincoln College, University of Canterbury, 1985. http://hdl.handle.net/10182/1178.

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The experiments described in this thesis investigated nutritional and physiological aspects of antler growth in red deer stags. The initial experiment (Section 3) examined the effects of winter nutrition on subsequent antler casting date and velvet antler weight. Mature stags on two different farm types (hill country, Farm H and irrigated lowland, Farm L) were offered three levels of winter nutrition, two levels of a concentrate supplement (ad libitum pellets and 1/2 ad libitum pellets) and a basal hay ration. On both properties liveweight gains occurred in supplemented groups and liveweight l

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Kautoke-Holani, Alisi Wenonalita. "Agricultural export growth and economic development for Tonga : the quest for efficiency : a thesis presented in partial fulfilment of the requirements for the degree of Master of Public Policy at Massey University, Albany, New Zealand." Massey University, 2008. http://hdl.handle.net/10179/899.

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Neo-liberalism has become the dominant approach to economic development since the 1980s. Based on the economic principle of “efficiency”, the Washington Consensus and its supporters have avidly promoted the neoliberal orthodoxy as the ideal blueprint for the economic development of all countries in every region. However, as this thesis has discovered, the efficiency of public policy is weighed not by its conformity to an ideology but on how effective it responds to the economic and social problems of the population in question. In recent years Tonga has endured severe economic shocks which hav

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Bates, Andrew John. "Effects of grazing management and pasture composition on the nitrogen dynamics of a dairy farm : a simulation analysis : a thesis submitted in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Lincoln University /." Diss., Lincoln University, 2009. http://hdl.handle.net/10182/1360.

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There is an extensive debate on the potential environmental impact of dairy farms and in particular the effect of dairy farms on the nitrogen cycle and the effect that this has on ecosystems. Within New Zealand and in particular in the South Island, the expansion of dairying and the adoption of new dairy systems has led to this becoming an increasingly important issue, locally through its effect on water quality and the environment and nationally and internationally through the production of green house gases. Increases in nitrogen usage at the expense of clover nitrogen fixation, irrigation,

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Thomas, Craig W. "Current practices and future possibilities of performance recording extensively-grazed commercial beef herds in New Zealand." Diss., Lincoln University, 2008. http://hdl.handle.net/10182/844.

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There is little evidence that the productivity of New Zealand beef herds has improved over time. Data from the NZ Meat and Wool Board’s Economic Service (2006) suggest that the average national calving percentage has declined over the last two decades. During the same period cattle carcass weights have increased but so too has the average cow live-weight which has resulted in increased maintenance costs of the cow herds. It is unclear whether production efficiency in the industry has improved or declined over time. The aim of this research was to develop means of improving productivity in

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Fisher, P. M. "Residual concentrations and persistence of the anticoagulant rodenticides brodifacoum and diphacinone in fauna." Lincoln University, 2009. http://hdl.handle.net/10182/930.

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Brodifacoum is a highly effective anticoagulant rodenticide that presents a secondary hazard to some non-target wildlife. The high acute toxicity of brodifacoum to mammals and birds, and its prolonged persistence in liver predicates secondary risk to predators and scavengers of poisoned rodents. Hence there is a need to improve ability to monitor and predict hazards of brodifacoum to non-targets, and optimise use patterns accordingly. Use of a less persistent anticoagulant rodenticide, diphacinone, is an alternative approach currently under investigation in New Zealand. This thesis describes a

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Bloomberg, Mark. "Modelling germination and early seedling growth of radiata pine." Lincoln University, 2008. http://hdl.handle.net/10182/681.

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Background: This study seeks to model aspects of the regeneration of radiata pine (Pinus radiata D.Don) seedlings under a range of environmental conditions. This study investigated whether “hybrid” mechanistic models, which predict plant growth and development using empirical representations of plant physiological responses to the environment, could provide a realistic alternative to conventional empirical regeneration models. Objectives: The objectives of this study were to 1) identify the functional relationships between the environmental conditions controlling germination, establishmen

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Black, Amanda. "Bioavailability of cadmium, copper, nickel and zinc in soils treated with biosolids and metal salts." Lincoln University, 2010. http://hdl.handle.net/10182/1561.

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It is widely accepted that bioavailability, rather than total soil concentration, is preferred when assessing the risk associated with metal contamination. Despite this, debate continues on what constitutes a bioavailable pool and how to best predict bioavailability, especially in relation to crop plants. The overall aim of this thesis was to assess and validate measures of cadmium (Cd), copper (Cu), nickel (Ni) and zinc (Zn) bioavailability in a range of soils amended with metal salts and biosolids. Six potential measures of bioavailability were investigated and compared: total metal; 0.04 M

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Lu, Xiao Feng. "Simulation of the upper Waimakariri River catchment by observed rain & radar reflectivity." Lincoln University, 2009. http://hdl.handle.net/10182/1161.

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ModClark and Clark’s Unit Hydrograph (Clark’s UH) within HEC-HMS software are distributed and lumped models, respectively. Clark’s UH simulates the transformation and attenuation of excess precipitation, and requires time of concentration (Tc) and Storage Coefficient (R) parameters. ModClark transformation accounts for variations in travel time to catchment outlet from all regions of a catchment, and it additionally requires gridded representation of a catchment and Gridded cell-based input files. Four cases (three from observed rain, and one from radar reflectivity) of three chosen events wer

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Mariappan, Sankar. "Soil redistribution impacts on the spatial variation of nutrients, net carbon exchange with the atmosphere and soil respiration rates in highly eroding agricultural fields from the foothills of the Indian Himalaya." Thesis, University of Exeter, 2016. http://hdl.handle.net/10871/23757.

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Using the tracer caesium-137 (137Cs) and experimental approaches this study quantified soil redistribution induced spatial variation of nutrients and soil organic carbon (SOC), net C flux between soil and atmosphere and soil respiration rate at various landscapes positions (eroding to deposition) within agricultural fields from the foot hills of Indian Himalaya. The depth distributions of 137Cs and the spatial patterns of 137Cs inventories were consistent with previous applications of the approach in that low inventories were associated with low concentrations in the cultivation layer and high

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Dittmer, Keren Elizabeth. "Inherited rickets in Corriedale sheep : a thesis presented in partial fulfilment of the requirements for the degree of Doctor of Philosophy at Massey University, Palmerston North, New Zealand." Massey University, 2008. http://hdl.handle.net/10179/882.

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Inherited rickets of Corriedale sheep is a newly discovered skeletal disease of sheep with simple autosomal recessive inheritance. The clinical signs resemble rickets in other species and include decreased growth rate, thoracic lordosis and angular limb deformities. Radiographic features include physeal thickening, blurred metaphyseal trabeculae and thickened porous cortices. Computed tomography scanning of long bones reveals increased bone mineral content and cortical area, but decreased bone mineral density. Gross lesions include segmental thickening of physes, growth arrest lines, collapse

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