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Rozprawy doktorskie na temat „Nitrate leaching”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Carter, E. Thomas Jr. "Risk assessment formulation for nitrate leaching." Thesis, Virginia Tech, 1996. http://hdl.handle.net/10919/40347.

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Carter, E. Thomas. "Risk assessment formulation for nitrate leaching /." This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-11182008-063039/.

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3

Wakida-Kusunoki, Fernando T. "Potential nitrate leaching from house building to groundwater." Thesis, University of Sheffield, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251274.

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4

Ottman, M. J., and J. E. Watson. "Nitrate Leaching Potential from a Single Border-Flood Irrigation." College of Agriculture, University of Arizona (Tucson, AZ), 1991. http://hdl.handle.net/10150/201383.

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Groundwater contamination by nitrate and other chemicals is a public concern and has subjected agriculture to scrutiny. Field studies were conducted at the Maricopa and Marana Agricultural Centers in 1989 to 1990 to document nitrate leaching potential with border flood irrigation. Calcium nitrate fertilizer was applied at various rates along with potassium bromide, which serves as an additional indicator of nitrate movement. Approximately 8.55 inches of irrigation water was applied at the Maricopa site on a sandy loam soil and 4.0 inches of irrigation water was applied at the Marana site on a

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5

Cordell, Susan Chapman. "Nitrate losses beneath an irrigated cotton field." Thesis, The University of Arizona, 1994. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu_e9791_1994_178_sip1_w.pdf&type=application/pdf.

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6

Matchett, Lisa Susanne. "Denitrification in riparian buffer zones." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310427.

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7

Ling, Ge. "Assessment of nitrate leaching in the unsaturated zone on Oahu." Thesis, Water Resources Research Center, 1996. http://hdl.handle.net/10125/21929.

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Groundwater contamination caused by agricultural fertilization is a widely recognized problem. In Hawaii, nitrogen fertilization from pineapple and sugarcane fields has posed a threat to several basal aquifers and has been implicated in coastal algae blooms. The concentration of nitrate-N in the Pearl Harbor basin on the island of Oahu was below 2.3 mg/L in the 1950’s and 1960’s, and has increased to as much as 7.6 mg/L in 1992 to 1994. The objective of this dissertation research is to develop a practical methodology for realistically estimating nitrate leaching from fertilized agricultural la

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8

Elder, Linda A. "Water table height and nitrate leaching in undisturbed soil columns." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27874.

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Water table control by subsurface drainage has been shown to affect leaching losses of nitrate-nitrogen: a concern both for economic use of fertilizer, and for maintenance of water quality. The effect of water table height on leaching of NO₃⁻-N was investigated in this study in nineteen 15cm x 100cm undisturbed cores of silty clay loam. The experiment simulated fertilization followed by rainfall, then rapid water table rise and fall, under conditions similiar to those experienced in the early spring in the Lower Fraser Valley. In the first part of the experiment, a concentrated solution of KNO

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9

Baigys, Giedrius. "Soil water regime and nitrate leaching dynamics applying no-tillage." Doctoral thesis, Lithuanian Academic Libraries Network (LABT), 2009. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2008~D_20090217_111111-32108.

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The impact of different agricultural systems used in agriculture on the leaching of nutrients and nitrates first of all depends on many factors that are not noticed and sometimes even underestimated by farmers trying to reach larger yields and better economic results. This article analysis the issue of changes in water regime and nitrate nitrogen leaching under the change of agricultural systems; such issue has not been investigated in Lithuania before. This research is especially relevant under the conditions of the Middle Lithuanian Lowland, where annual crops (cereals and sugar beet) area m

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10

Shah, Sanjay Bikram. "Agronomic and Nitrate Leaching Impacts of Pelletized versus Granular Urea." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/29201.

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Agronomic and water quality impacts of urea particle size were evaluated through field and laboratory experiments and mathematical modeling. In a two-year field study, corn silage yield, corn nitrogen (N) removal, and nitrate-N (NO₃⁻-N) leaching from urea pellets (1.5 g each) and granules (0.01-0.02 g each) applied at 184 kg-N/ha were compared. A control treatment (no N) and two other N application rates (110 and 258 kg-N/ha) were also included. Urea particle size impact on dissolution rate, dissolved urea movement, mineralization, and N0³-N leaching were evaluated in the laboratory. A two-dim

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11

Silgram, Martyn. "Hydrological controls on nitrate leaching : an integrated fieldwork and modelling study." Thesis, Imperial College London, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.267286.

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12

Stoewer, Myriam Maria [Verfasser], and Christine [Akademischer Betreuer] Stumpp. "Vulnerability assessment of nitrate leaching on the regional scale using isotope techniques." Freiburg : Universität, 2016. http://d-nb.info/1119717485/34.

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13

Chabon, Joshua D. "Irrigation management effects on nitrate leaching and mowing requirements of tall fescue." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/17716.

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Master of Science<br>Department of Horticulture, Forestry, and Recreation Resources<br>Dale J. Bremer<br>Jack D. Fry<br>Irrigation management may influence nitrate leaching under tall fescue (Festuca arundinacea) and also affect its mowing requirements. Two experiments were conducted on tall fescue growing on a Chase silt loam soil near Manhattan, Kansas. Each experiment was arranged in a split-plot design, with irrigation treatments applied to whole plots: 1) frequency-based irrigation, water was applied three times weekly to deliver a total of 19 mm water wk⁻¹ regardless of weather condition

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14

Yazid, Sadek Mohammed. "Solute leaching studies in cropped field plots and laboratory columns using nitrate, bromide and chloride tracers." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/27726.

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15

Thurtell, Stephen W. "Nitrate leaching from nursery sod production as affected by nitrogen and water management." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq24511.pdf.

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16

Roy, James W. "Infiltration, nitrate and chloride leaching, and dicamba fate in unsaturated soil below turfgrass." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ35929.pdf.

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17

Rydberg, Ingrid. "Breeding of catch crops : a way to reduce nitrate leaching from arable land /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1998. http://epsilon.slu.se/avh/1998/91-576-5525-1.gif.

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18

Conrad, Yvonne [Verfasser]. "Model-based quantification of nitrate-nitrogen leaching considering sources of uncertainty / Yvonne Conrad." Kiel : Universitätsbibliothek Kiel, 2017. http://d-nb.info/1128149249/34.

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19

Qi, Zhiming. "Monitoring and modeling of subsurface drainage and nitrate leaching under various land covers." [Ames, Iowa : Iowa State University], 2009. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3389138.

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20

Branson, Johannah Helen. "The farm-level impact of policies to reduce nitrate emission from livestock waste : an economic analysis." Thesis, University of Exeter, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.300519.

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21

Dennis, S. J. "Nitrate leaching and nitrous oxide emission from grazed grassland: upscaling from lysimeters to farm." Lincoln University, 2009. http://hdl.handle.net/10182/1269.

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Irish agriculture is becoming increasingly regulated, with restrictions on fertiliser application rates and stocking rates to reduce nitrate (NO₀⁻) leaching losses. However these regulations have been, to date, based on minimal field research. The purpose of this study was to determine the actual leaching losses of nitrate from Irish dairy pasture at a range of stocking rates, and to investigate the effectiveness of the nitrification inhibitor DCD at reducing nitrate leaching losses where these are deemed excessive. In grazed pastures, a major source of leached nitrate is the urine patch, whe

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22

Grift, Sheri L. "Impact of leaching and denitrification on temporal distribution of nitrate in several Manitoba soils." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ62741.pdf.

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23

Burgess, Magdalena S. E. "Nitrate leaching from a subsurface-drained corn field under different tillage and residue levels." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=55481.

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Nitrate leaching was studied on a 2.4-ha subsurface-drained corn (Zea mays L.) field in southwestern Quebec. The soil was a sandy loam to loamy sand (mean depth 46 cm) overlying clay. Treatments, begun in fall 1991, consisted of no-till, reduced tillage, and conventional tillage with crop residues either removed or retained at harvest. Drain flow volume and NO$ sb3 sp-$-N concentrations in flow were monitored year-round, and soil NO$ sb3 sp-$-N levels measured in spring and fall. A total of 34 kg NO$ sb3 sp-$-N ha$ sp{-1}$ was recorded in drain flow in 1992 from the site as a whole, equivalent

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24

Johnson, Terrence G. "A model of nitrate leaching from agricultural systems in the northern neck of Virginia." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/37887.

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A model (VTCROPS) was developed to simulate the long-term effects of nitrogen (N) leaching to groundwater in the Northern Neck region of Virginia, and ultimately to the Chesapeake Bay. VTCROPS simulates N fate and transport in a soil-plant-atmosphere continuum in a vertical slice between two crop rows, enabling consideration of nonuniform fertilizer placement and root growth patterns. VTCROPS models atmospheric, soil and crop subsystems. Atmospheric conditions (rainfall, temperature, solar radiation) may be directly input by the user or generated using a stochastic climatic generator. The soil

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25

Johnson, Terrence Guilford. "A model of nitrate leaching from agricultural systems in the northern neck of Virginia /." This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-05222007-091359/.

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26

Saha, Subhrajit Kumar. "Effect of fertilizer source on nitrate leaching, plant water consumption, and turf and ornamental quality." [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0003300.

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27

Rosenqvist, Lars. "Afforestation of former arable land in north-western Europe : nitrate leaching, carbon sequestration and water recharge /." Uppsala : Dept. of Forest Soils, Swedish University of Agricultural Sciences, 2007. http://epsilon.slu.se/200702.pdf.

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28

Almadni, Mftah Alhusen Alhadi. "Impact of agricultural management on risks of nitrate leaching in crop rotations with potatoes and cereals." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2713.

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There is concern about increased nitrate levels in drinking water due to potential impacts on human health. At the same time there are also concerns about the environmental impact of increased levels of nitrate in surface water systems; the increased amount of nitrate in surface water can cause eutrophication. It has become almost axiomatic that nitrate which comes from agriculture soils is one of the main drivers of the increased nitrate levels in water. Arable agriculture is considered to be one of the main sources of nitrate due to high rates of nitrogen fertiliser or manure application, no

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29

Martin, E. C., E. J. Pegelow, and J. Watson. "Assessing the Impact of Irrigation Management Strategies on Yield and Nitrate Leaching in Upland Cotton Production." College of Agriculture, University of Arizona (Tucson, AZ), 1996. http://hdl.handle.net/10150/210898.

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Although the cost for water is one of the largest expenditures in a grower's budget, many growers still over -irrigate their fields to assure that there will be no yield losses. Although these over -irrigations usually do not cause any negative effect to the crop, they can cause the loss of available nitrogen to the plant and the potential of nitrate contamination of groundwater resources. To assess what impact over-irrigation may have on yield and the potential for groundwater contamination, a drainage lysimeter study was initiated at the Maricopa Agricultural Center, Maricopa Arizona. Draina

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30

roitero, manuele. "ACHIEVING THE NITRATE DIRECTIVE: FIELD MEASUREMENTS AND SIMULATION APPROACH." Doctoral thesis, Università degli studi di Padova, 2010. http://hdl.handle.net/11577/3422358.

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Sustainable crop production requires nitrogen (N) and phosphorus (P) inputs to compensate for the elements removed from the system by plant uptake and losses. Often, however, Losses of N are positively related to input levels. Also the effect of climate (precipitation) and soil properties can promote or limit N loss. Agricultural losses should be minimized as they largely determine the quality of water bodies. The relationship between animal density and water quality in Europe, has lead the European Union, throughout the Nitrates Directive, to set a limit of 170 kg N manure ha per year as a pr

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31

Tedesco, Sara. "Avaliação das práticas de gestão da rega e da fertilização nas hortas urbanas de Lisboa: experimentação e modelação. Contributos para uma agricultura urbana ambientalmente sustentável." Master's thesis, ISA/UTL, 2013. http://hdl.handle.net/10400.5/5652.

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Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia<br>This work aims to study the water and nitrogen (N) related processes in several Urban Gardens of Lisbon and to find alternative management practices in order to minimize the N losses. The applied methodology integrates field experiments and modeling. Five allotments were selected as case studies and characterized in terms of soils and agricultural management practices. The water and N related processes were modeled with RZWQM2. After calibration, RZWQM2 accurately simulated the evolution of the N profiles after the su

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32

Carli, Roberto Simão de. "DINÂMICA DO NITROGÊNIO INFLUENCIADA PELA ADUBAÇÃO NITROGENADA E ADIÇÃO DE GESSO EM SISTEMA PLANTIO DIRETO DE LONGA DURAÇÃO." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2016. http://tede2.uepg.br/jspui/handle/prefix/2295.

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Made available in DSpace on 2017-07-25T19:31:00Z (GMT). No. of bitstreams: 1 Roberto De Carli.pdf: 2079271 bytes, checksum: 6ef44a2405637e03f847a58547e5b604 (MD5) Previous issue date: 2016-06-29<br>Nitrogen is a nutrient with such a high contribution for agriculture, that various strategies are studied every year looking for enhancements of its use efficiency and reduction of its environmental impacts. This study hypothesis is that, the use of gypsum can change the soil’s nitrogen dynamic in the no-tillage system. So, the main objective of this study was to relate the dynamic of the labile c

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33

Serem, Vincent Kipyego Arap. "Effects of tillage and corn residues on nitrate-nitrogen and water movement through soil." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29130.

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Laboratory soil columns, 0.3 m diameter $ times$ 0.7 m long, and two computer simulation models, LEACHM-N and NTRM, were used to investigate nitrate-nitrogen ($ rm NO sb{3 sp{-}}$-N) leaching in a sandy loam soil. The following treatments were studied: no-till (NT), reduced tillage (RT), and conventional tillage (CT) practices, with residue (R) and without residue (NR). Nitrogen fertilizer was applied at a rate of 180 kg/ha in granular form (experiment I), and in solution form a year later (experiment II). In both experiments, water was applied 5 times over 3 to 4 weeks duration, with each app

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34

Readman, Russell J. "The physiological basis and consequences for nitrate leaching of novel fertiliser strategies involving foliar fertilisation of wheat." Thesis, Open University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.321312.

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35

Bae, Jinyong. "Role of nitrogen and clipping-return on turf growth and nitrate leaching in zoysiagrass (Zoysia japonica Steud.)." [Gainesville, Fla.] : University of Florida, 2009. http://purl.fcla.edu/fcla/etd/UFE0024923.

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36

Isse, Abdullahi. "Capacity of cover crops to capture excess fertilizer and maintain soil efficiency." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0021/MQ37132.pdf.

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37

Fabio, Eric. "INFLUENCE OF MOISTURE REGIME AND TREE SPECIES ON NITROGEN CYCLING AND DECOMPOSITION DYNAMICS IN DECIDUOUS FORESTS OF MAMMOTH CAVE NATIONAL PARK, KENTUCKY, USA." UKnowledge, 2006. http://uknowledge.uky.edu/gradschool_theses/287.

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The study of biogeochemical cycles and their role in ecosystem function has helped to highlight the impacts of human activities on natural processes. However, our understanding of the effects of nitrogen (N) deposition on forested ecosystems remains limited due to the variable controls on N cycling. Soils, microclimate, and vegetation can influence rates and processes of N cycling, singly or in concert at multiple scales. Understanding how these factors influence N cycling across the landscape will help to elucidate the impacts of N deposition. The objectives of this study were to characterize

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38

Hughes, Robert Guy. "Delay in the leaching of nitrate caused by adsorption on two variable charge soils from the humid tropics." Thesis, University of Reading, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329334.

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39

Beckman, Marie. "Kvävestatus och risk för nitrifikation i två avverkade skogsområden i Halland." Thesis, Uppsala University, Department of Earth Sciences, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9282.

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<p>Nitrogen deposition leads to environmental damage in areas where the nitrogen deposition is high. Southwest Sweden receives an annual nitrogen deposition of up to 20 kg N/ha. Nitrogen that is not assimilated by the vegetation is accumulated in the soil, which may lead to nitrogen saturation and an elevated risk of nitrogen leaching. Nitrogen leaching from forest areas in southern Sweden has proven to be higher than from agricultural areas, which have been thought to be the main contributors to elevated nitrogen levels in rivers and lakes. The amount of nitrogen that leaches depends on the f

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40

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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41

Rodda, Harvey John Edward. "The development and application of a nitrogen cycle model to predict nitrate leaching from grassland catchments within the United Kingdom." Thesis, University of Exeter, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.332282.

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42

Kunrath, Taise Robinson. "Sistemas integrados de produção agropecuária : o papel da pastagem na solução do dilema produção versus conservação." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2014. http://hdl.handle.net/10183/108535.

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Além dos fins produtivos, as pastagens desempenham importante papel na preservação ambiental e na dinâmica da atmosfera e hidrosfera. Esta tese apresenta dois trabalhos, que demonstram as duas faces da pastagem nos sistemas produtivos. O primeiro trabalho, se refere a produção aliada à conservação e teve por objetivos (i) verificar se existe padrão no comportamento das variáveis de produção animal de pastos manejados em diferentes alturas e (ii) identificar metas de manejo que aliem produção e conservação. Este trabalho foi desenvolvido em um sistema integrado de produção agropecuária (SIPA) d

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43

Miller, Gilbert D. "A Simulation of the Economic Effects of Alternative Soil Types and Nitrogen Sources on Nitrate Leaching on Irrigates Agriculture in Utah." DigitalCommons@USU, 1991. https://digitalcommons.usu.edu/etd/4041.

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The economic impact of reducing the amount of nitrate leached out of the root zone under irrigation in the arid West was examined. A general introduction into the nature of the problem and a review of the literature was provided in chapter I. In chapter ll the economic incentives of irrigation management were evaluated under the assumptions of both profit-maximizing and utility-maximizing (in reducing cost and effort expended in irrigation) decision-making criteria. The results indicate that there is a coincidence of interests of the farmer and the environment. Both behaviors result in less ni

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44

Andreucci, Mariana Pares. "Perdas nitrogenadas e recuperação aparente de nitrogênio em fontes de adubação de capim elefante." Universidade de São Paulo, 2008. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-20022008-165101/.

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O manejo eficiente de fertilizações nitrogenadas em sistemas de exploração a pasto é peça chave para que melhores índices produtivos sejam alcançados. O conhecimento das perdas intrínsecas a esta prática e de fontes nitrogenadas alterntivas às normalmente usadas proporciona a determinação de melhores eficiências e flexibilidade na escolha da forma do nitrogênio aplicado. Assim o presente estudo teve o objetivo de avaliar as perdas por lixiviação de nitrato e volatilização de amônia, juntamente com a recuperação aparente do nitrogênio, em pastagens de capim elefante manejadas sob elevada fertil

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45

Larsson, Martin. "Quantifying macropore flow effects on nitrate and pesticide leaching in a structured clay soil : field experiments and modelling with the MACRO and SOILN models /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 1999. http://epsilon.slu.se/avh/1999/91-576-5489-1.pdf.

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46

Chelil, Samy. "Assimilation de données pour améliorer les modèles de qualité de l'eau : vers un indicateur de pression azotée." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS440.

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L’exposition de la ressource en eau naturelle (cours d’eau, nappe souterraine) à la pollution azotée diffuse dans un contexte agricole est due essentiellement à la surfertilisation des parcelles agricoles à des fins d’amélioration du rendement des cultures. Malgré des efforts considérables menés à différentes échelles pour optimiser les pratiques culturales, le surplus azoté du sol présente un risque élevé de lixiviation des nitrates vers les milieux aquatiques notamment en début de la saison hivernale. En effet, l’absence des cultures piège à nitrate (CIPAN) en cette période, la forte minéral

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47

Zardo, Filho Renato. "GESSO AGRÍCOLA E ADUBAÇÃO NITROGENADA NA CULTURA DO MILHO EM SISTEMA PLANTIO DIRETO." UNIVERSIDADE ESTADUAL DE PONTA GROSSA, 2011. http://tede2.uepg.br/jspui/handle/prefix/2228.

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Made available in DSpace on 2017-07-25T19:29:55Z (GMT). No. of bitstreams: 1 Renato Zardo Filho.pdf: 15832288 bytes, checksum: e334707a14d42a6e9b7f1e5f0574d2ac (MD5) Previous issue date: 2012-11-10<br>Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>A considerably part of the high nitrogen (N) rates applied in corn is not absorbed due root growth restriction by subsoil acidity. Gypsum is able to improve conditions for root growth and lead to greater N uptake efficiency, increasing corn yield. Thus to evaluate the effect of gypsum and N on top dressing on soil chemical attribu

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Kim, Youngsun [Verfasser], and John [Akademischer Betreuer] Tenhunen. "Estimation and mitigation assessment of N2O emission and nitrate leaching in a mountainous catchment in South Korea using the LandscapeDNDC model / Youngsun Kim. Betreuer: John Tenhunen." Bayreuth : Universität Bayreuth, 2015. http://d-nb.info/1068860499/34.

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Jebli, Mouad. "Caractérisation à l'échelle locale des propriétés mécaniques de l'interphase pâte de ciment-granulat : application à la lixiviation." Thesis, Montpellier, 2016. http://www.theses.fr/2016MONTT339/document.

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Ce travail de thèse est consacré à la caractérisation des propriétés mécaniques de l’interphase pâte de ciment-granulat au cours de l’hydratation et au cours de la dégradation chimique par lixiviation. La microstructure de l'interphase entre la pâte de ciment et les granulats est caractérisée par une porosité supérieure à celle de la pâte de ciment. Cette zone constitue un point de fragilité dans le béton et ses propriétés affectent fortement le comportement mécanique du béton à l’échelle macroscopique et à l’échelle de la structure. Dans ce travail, la résistance de l’interphase pâte de cimen

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Paulo, Ezio Nalin de. "Avaliação do inibidor de nitrificação fosfato de 3,4-dimetilpirazol (DMPP) em três solos com gradiente textural, absorção e uso de nitrogênio em plantas de algodão." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/64/64133/tde-17012013-140846/.

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A utilização de inibidores de nitrificação pode ser uma alternativa interessante para aumentar a eficiência do uso do fertilizante nitrogenado em diversas culturas, porém, essa alternativa vem sendo pouco estudada em condições de solo e clima do Brasil. Assim, objetivou-se com esse trabalho avaliar a eficiência do inibidor de nitrificação fosfato de 3,4-dimetilpirazol (DMPP) em três solos com gradiente textural, bem como avaliar o destino do nitrogênio (N-NO3-, N-NH4+ e 15N) no solo, a absorção e o uso do nitrogênio (N-total e 15N) nas plantas de algodão. Três experimentos foram montados e des

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