Log in

Relevant bibliographies by topics / Soil organic matter modeling / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Soil organic matter modeling.

Dissertations / Theses on the topic 'Soil organic matter modeling'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Soil organic matter modeling.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Nilsson, K. Sofia. "Modelling soil organic matter turnover /." Uppsala : Dept. of Ecology and Environmental Research, Swedish Univ. of Agricultural Sciences, 2004. http://epsilon.slu.se/s326.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Sohi, Saran Paul. "Dynamic modelling of soil organic matter using physically defined fractions." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.251765.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Hammoudi, Alaaeddine. "Modeling and mathematical analysis of the dynamics of soil organic carbon." Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS205/document.

Full text

Abstract:

La compréhension du cycle de la matière organique du sol (MOS) est un outil majeur dans la lutte contre le réchauffement climatique, la préservation de la biodiversité ainsi que dans la consolidation de la sécurité alimentaire. Dans ce contexte, cette thèse porte sur la modélisation et l'analyse mathématique de modèles de la dynamique du carbone organique dans le sol.Dans le chapitre 2, nous avons étudié la robustesse et les propriétés mathématiques d'un modèle non linéaire (MOMOS). Nous avons montré que si les données sont périodiques nous obtenons l'existence d'une solution périodique attrac

APA, Harvard, Vancouver, ISO, and other styles

4

Kadono, Atsunobu. "Studies on modelling of soil organic matter decomposition processes under different ecosystems." Kyoto University, 2008. http://hdl.handle.net/2433/136624.

Full text

Abstract:

Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第13897号<br>農博第1712号<br>新制||農||956(附属図書館)<br>学位論文||H20||N4364(農学部図書室)<br>UT51-2008-C813<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授小﨑隆, 教授谷誠, 教授縄田栄治<br>学位規則第4条第1項該当

APA, Harvard, Vancouver, ISO, and other styles

5

Kroll, Jeffrey T. "LANDUSE AND SOIL ORGANIC CARBON VARIABILITY IN THE OLD WOMAN CREEK WATERSHED OF NORTH CENTRAL OHIO." Miami University / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=miami1165431813.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Demyan, Michael Scott [Verfasser], and Georg [Akademischer Betreuer] Cadisch. "Development of coupled mid-infrared spectroscopic and thermal analytical approaches for the characterization and modeling of soil organic matter dynamics of arable soils / Michael Scott Demyan. Betreuer: Georg Cadisch." Hohenheim : Kommunikations-, Informations- und Medienzentrum der Universität Hohenheim, 2014. http://d-nb.info/1049982320/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Georgis, Kidane. "The effect of fertiliser management practices on soil organic matter production in the semi-arid areas : a field and modelling approach." Title page, contents and abstract only, 1997. http://web4.library.adelaide.edu.au/theses/09AFP/09afpg352.pdf.

Full text

Abstract:

Bibliography: leaves 155-169. Studies the effect of nitrogen fertilizer on dry matter production under differing watering regimes. Investigates the accuracy of different crop and soil organic matter models for predicting crop yield, nitrogen uptake and changes in soil organic carbon and nitrogen. Compares the models with data from long-term field experiments on wheat in Australia and sorghum in Ethiopia. Finds that a higher crop yield and better nitrogen and water utilisation can be achieved if addition of nitrogen fertilizer is balanced with soil water.

APA, Harvard, Vancouver, ISO, and other styles

8

Louis, Benjamin. "Prise en compte du rôle de la diversité microbienne dans la simulation de la dynamique de la matière organique du sol (MOS) dans un contexte de transition vers l'agro-écologie." Thesis, Rennes, Agrocampus Ouest, 2016. http://www.theses.fr/2016NSARC126/document.

Full text

Abstract:

La thèse propose et évalue une méthode de prise en compte de la diversité microbienne dans un modèle mécaniste opérationnel de dynamique du carbone (C). Partant d'un modèle classique dont les flux de minéralisation sont décrits par des cinétiques d'ordre 1, nous proposons des fonctions de modulation des paramètres des équations prenant en compte des indices de diversité microbienne. Elle s’appuie sur 2 jeux de données contenant des mesures de diversité microbienne et des cinétiques de minéralisation du C sur 80 jours, en conditions contrôlées, avec et sans apport de blé marqué au 13C, issus d'

APA, Harvard, Vancouver, ISO, and other styles

9

Djae, Tanalou. "Propriétés de complexation de la matière organique dissoute vis-à-vis du cuivre dans les systèmes sol-plante amendés avec des produits résiduaires organiques." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0092.

Full text

Abstract:

La compréhension des déterminants de la biodisponibilité du cuivre (Cu) dans les sols agricoles recevant des apports de produits résiduaires organiques (Pro) est un enjeu écotoxicologique majeur dans l’optique de préserver la fertilité des sols. La spéciation de Cu dans la solution du sol est classiquement considérée en écotoxicologie prédictive comme le principal déterminant chimique de la biodisponibilité de Cu pour les organismes du sol. Étant donné la forte affinité de Cu pour la matière organique dissoute (MOD), la spéciation de Cu dans la solution du sol est fortement conditionnée par la

APA, Harvard, Vancouver, ISO, and other styles

10

Nicoloso, Rodrigo da Silveira. "Dinâmica da matéria orgânica do solo em áreas de integração lavoura-pecuária sob sistema plantio direto." Universidade Federal de Santa Maria, 2005. http://repositorio.ufsm.br/handle/1/5466.

Full text

Abstract:

Conselho Nacional de Desenvolvimento Científico e Tecnológico<br>The cattle breeding and crop production integrated systems in the south of Brazil is based mostly on grain production with summer crops and beef cattle production over winter pastures. This activity have been expanded quickly in the state of Rio Grande do Sul, due the increase of soybean cultivation over native grass fields areas and the requirement to improve the livestock productivity index in that state. However, few research works exists until this moment to show the best management systems to this areas mainly due to its dis

APA, Harvard, Vancouver, ISO, and other styles

11

Moraes, Murilo Impulcetto Monteiro de. "Mineralização bruta (amonificação) de nitrogênio em solos cultivados com cana-de-açúcar." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/64/64134/tde-03092013-162802/.

Full text

Abstract:

A ciclagem do nitrogênio (N) apresenta dinâmica complexa, pelas múltiplas transformações e por sua mobilidade no sistema solo-planta-atmosfera. Assim, o estudo das taxas de conversão do ciclo interno de N é fundamental, visto que essas taxas têm efeito direto na produtividade e na qualidade ambiental de um agroecossistema. O objetivo deste trabalho foi avaliar o efeito da temperatura e umidade na taxa de mineralização bruta de N (TMB) em solos cultivados com canade- açúcar no estado de São Paulo, e por meio de modelo matemático, estimar a TMB considerando as variações de temperatura e umidade

APA, Harvard, Vancouver, ISO, and other styles

12

Galdos, Marcelo Valadares. "Dinâmica do carbono do solo no agrossistema cana-de-açúcar." Universidade de São Paulo, 2007. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-14092007-140801/.

Full text

Abstract:

No contexto da atual busca por alternativas ao consumo de combustíveis fósseis, a cultura da cana-de-açúcar tem sido apontada como uma das mais viáveis fontes de combustível renovável a partir da biomassa. A tradicional colheita manual, feita após a queima da palhada para facilitar o corte e o transporte, vem sendo substituída pela colheita mecanizada, sem queima, por razões econômicas, legais e ambientais. Sabe-se que a manutenção da palhada sobre o solo influencia a dinâmica de água, nutrientes e matéria orgânica do solo, mas seus efeitos ainda não são suficientemente conhecidos, principalme

APA, Harvard, Vancouver, ISO, and other styles

13

Almeida, Fabrício Pelizer de. "Distribuição e correlação dos parâmetros físicos e químicos do solo em área úmida do cerrado aplicando modelos matemáticos." Universidade Federal de Uberlândia, 2016. https://repositorio.ufu.br/handle/123456789/16022.

Full text

Abstract:

Wetlands in tropical regions constitute an important frontier of knowledge due to the complexity of the mineralogical constituents of the biogeochemistry dynamic and the roles it plays in maintaining the Cerrado biome sustainability. Occur in these areas of topographic depression, hydromorphic soils, characterized by the condition of poor drainage and waterlogging. Already in Plains occur when replaying morphological patterns, characterized as lots of semielliptical lands and depressions, known as \'murundus fields . Two thoughts talk about their training, one that deals with the geomorphologi

APA, Harvard, Vancouver, ISO, and other styles

14

Yapa, 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 text

APA, Harvard, Vancouver, ISO, and other styles

15

Yusran, Fadly Hairannoor. "Soil organic matter decomposition : effects of organic matter addition on phosphorus dynamics in lateritic soils." University of Western Australia. School of Earth and Geographical Sciences, 2005. http://theses.library.uwa.edu.au/adt-WU2005.0120.

Full text

Abstract:

[Truncated abstract] Relationships between the persistence of organic matter added to soil, the dynamics of soil organic carbon (C) and phosphorus (P) were examined in four experiments on lateritic soils of Western Australia. The main objective was to quantify the release of P following organic matter application in soils which have high P adsorbing capacity. Another objective was to confirm that due to its recalcitrant materials, the effect of peat lasted longer in soil than other sources of organic matter in terms of increasing plant-available P fractions. Three experiments were conducted u

APA, Harvard, Vancouver, ISO, and other styles

16

Zakharova, Anna. "Soil organic matter dynamics: influence of soil disturbance on labile pools." Thesis, University of Canterbury. School of Biological Sciences, 2014. http://hdl.handle.net/10092/9944.

Full text

Abstract:

Soils are the largest pool of carbon (C) in terrestrial ecosystems and store 1500 Gt of C in their soil organic matter (SOM). SOM is a dynamic, complex and heterogeneous mixture, which influences soil quality through a wide range of soil properties. Labile SOM comprises a small fraction of total SOM (approximately 5%), but due to its rapid turnover has been suggested to be most vulnerable to loss following soil disturbance. This research was undertaken to examine the consequences of soil disturbance on labile SOM, its availability and protection in soils using the isotopic analysis of soil-res

APA, Harvard, Vancouver, ISO, and other styles

17

Burns, Nancy Rosalind. "Soil organic matter stability and the temperature sensitivity of soil respiration." Thesis, University of Edinburgh, 2012. http://hdl.handle.net/1842/9922.

Full text

Abstract:

Soil respiration is an important source of atmospheric CO2, with the potential for large positive feedbacks with global warming. The size of these feedbacks will depend on the relative sensitivity to temperature of very large global pools of highly stable soil organic matter (SOM), with residence times of centuries or longer. Conflicting evidence exists as to the relationships between temperature sensitivity of respiration and stability of SOM, as well as the temperature sensitivity of individual stabilisation mechanisms. This PhD considers the relationship between different stabilisation mech

APA, Harvard, Vancouver, ISO, and other styles

18

Christensen, Bent T. "Organic matter in soil : structure, function and turnover /." Tjele : Danish institute of agricultural sciences. Research centre Foulum, 2000. http://catalogue.bnf.fr/ark:/12148/cb388316309.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Doohan, Thomas James. "Drivers of Soil Organic Matter Stabilization across Ohio." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1597941993038872.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Ogden, J. M. "Some effects of afforestation on soil organic matter." Thesis, University of Stirling, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.375418.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Frankki, Sofia. "Association of organic compounds to dissolved and particulate natural organic matter in soils /." Umeå : Dept. of Forest Ecology, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/200652.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Fujisaki, Kenji. "Devenir des stocks de carbone organique des sols après déforestation et mise en culture : une analyse diachronique en contexte amazonien." Thesis, Montpellier, SupAgro, 2014. http://www.theses.fr/2014NSAM0036/document.

Full text

Abstract:

Le carbone organique des sols (COS) joue un rôle majeur dans le maintien des propriétés des sols, et constitue un important réservoir de carbone sensible aux perturbations anthropiques dont les changements d'usage ou de gestion des terres. En Amazonie, la déforestation libère des gaz à effet de serre (GES) par le brûlis de la végétation mais les stocks de COS sont également susceptibles d'évoluer et de contribuer aux émissions de GES. Nous montrons que ces variations de stocks sont cependant mal comprises à l'échelle du biome, en raison de l'approche par chrono-séquence qui induit de nombreuse

APA, Harvard, Vancouver, ISO, and other styles

23

Wagai, Rota. "Climatic and Lithogenic Controls on Soil Organic Matter-Mineral Associations." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/WagaiR2005.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Herrmann, Anke. "Predicting nitrogen mineralization from soil organic matter - a chimera? /." Uppsala : Dept. of Soil Sciences, Swedish Univ. of Agricultural Sciences, 2003. http://epsilon.slu.se/a429.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Sequeira, Cleiton Henrique. "Soil Organic Matter Dynamics in Cropping Systems of Virginia's Valley Region." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/37381.

Full text

Abstract:

Soil organic matter (SOM) is a well known indicator of soil quality due to its direct influence on soil properties such as structure, soil stability, water availability, cation exchange capacity, nutrient cycling, and pH buffering and amelioration. Study sites were selected in the Valley region of Virginia with the study objectives to: i) compare the efficiency of density solutions used in recovering free-light fraction (FLF) organic matter; ii) compare different soil organic fractions as sensitive indices of short-term changes in SOM due to management practices; iii) investigate on-farm effec

APA, Harvard, Vancouver, ISO, and other styles

26

Sheremata, Tamara W. "The influence of soil organic matter on the fate of trichloroethylene in soil." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0017/NQ44582.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Eleki, Krisztina. "Soil management, crop rotations, and biomass removal effects on soil organic matter content." [Ames, Iowa : Iowa State University], 2007.

Find full text

APA, Harvard, Vancouver, ISO, and other styles

28

Williams, Stephen. "Soil transformations of added organic matter in organic farming systems and conventional agriculture." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU083669.

Full text

Abstract:

The aim of this work was to assay the effects of previous history of organic amendment to soils in the field on the ability of those soils to mineralise mustard, a non-legume green manure. Soil and 15N labelled mustard mineralisation was followed in laboratory microcosms. Volatilised N was assayed by direct acid trapping of N in glass fibre disks, followed by direct combustion isotope ratio mass spectrometry. Animal manures, green manures and straw added to the soil in the field in the previous season, same season and for 7 years continuously did not significantly affect these soils' ability t

APA, Harvard, Vancouver, ISO, and other styles

29

Faituri, Mikaeel Y. "Soil organic matter in Mediterranean and Scandinavian forest ecosystems : dynamics of organic matter, nutrients, and monomeric phenolic compounds /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2002. http://epsilon.slu.se/avh/2002/91-576-6320-3.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Gruver, Joel Brooks. "Impact of Management and Texture on Soil Organic Matter Fractions." NCSU, 2007. http://www.lib.ncsu.edu/theses/available/etd-12172007-065019/.

Full text

Abstract:

Growing concerns about elevated levels of atmospheric CO2 and associated climate change have increased interest in soil C. While general increases in the adoption of conservation management practices may result in C sequestration, efficient utilization of soil as a C sink will require identification of soils with high potential for sequestration and improved methods of monitoring soil C. The objectives of this research were to: 1) evaluate the historical roots, experimental validation and subsequent impact of the C saturation relationships proposed by Jan Hassink, 2) evaluate the effects of ma

APA, Harvard, Vancouver, ISO, and other styles

31

Bell, Madison. "Developing Statistical and Analytical Methods for Untargeted Analysis of Complex Environmental Matrices." Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41626.

Full text

Abstract:

The main objective of this thesis was to develop statistical and analytical methods for untargeted analyses of complex environmental matrices like soil and sediment. Untargeted analyses are notoriously difficult to perform in matrices like soil and sediment because of the complexity of organic matter composition within these matrices. This thesis aimed to (1) Develop and compare extraction methods for untargeted analyses of soil and sediment while also developing data handling and quality control protocols; (2) Investigate novel applications of untargeted analyses for environmental classificat

APA, Harvard, Vancouver, ISO, and other styles

32

Wick, Abbey Foster. "Soil aggregate and organic matter dynamics in reclaimed mineland soils." Laramie, Wyo. : University of Wyoming, 2007. http://proquest.umi.com/pqdweb?did=1400961671&sid=1&Fmt=2&clientId=18949&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Watts, Christopher W. "Interactions between tillage energy soil structural stability and organic matter." Thesis, Cranfield University, 2003. http://dspace.lib.cranfield.ac.uk/handle/1826/10529.

Full text

Abstract:

In agricultural production, disturbance of the soil by cultivation occurs regularly. Mechanical energy applied in this way can have a adverse effect on soil stability, a lowering of soil organic matter (S_OM), and a increase in CO2 emissions. These changes result in unwanted environmental consequences and compromise the ability of soil to maintain a competitive and sustainable agricultural industry. As agricultural systems evolve, it becomes important to develop a indication of their sustainability with regard to soil structure, well before any serious consequences become apparent. The am of t

APA, Harvard, Vancouver, ISO, and other styles

34

Zhou, Jie [Verfasser]. "Mycorrhization and Warming Modulate Soil Organic Matter Stability / Jie Zhou." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2021. http://d-nb.info/1236401581/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Maas, Ellen DvL. "The Cascading Effects of Climate Change on Soil Organic Matter." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492076671912468.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

McCabe, Darren P. M. "Spatial location of active soil bacteria and their association with soil organic matter fractions." Thesis, University of Reading, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.559246.

Full text

Abstract:

The heterogeneous maze of water and gas filled pores within the soil forms the habitat for the diverse bacterial component of the soil biota. These microorganisms play an essential role in soil processes, but the specificity of their location and that of their associated substrates within these pores remains to be revealed. This research tested a novel approach to assess the contribution of pore neck size to bacterial diversity in soil, using soil aggregates obtained at increasing depths from a rhizotron under the perennial bioenergy crop Miscanthus x giganteus. The nucleotide analogue bromode

APA, Harvard, Vancouver, ISO, and other styles

37

Franco, André Luiz Custódio. "Soil engineering by macroinvertebrates: controls on soil organic matter storage across land use change." Universidade de São Paulo, 2015. http://www.teses.usp.br/teses/disponiveis/11/11140/tde-26052015-165800/.

Full text

Abstract:

Globally land use change (LUC) with increasing in land use intensity has led to a decrease in soil organic matter (SOM). The reduction of soil C stock across LUC has been accompanied by a destabilization of soil structure and increases the soil erosion susceptibility. The destabilized soil structure is also concomitant with a loss of soil biodiversity and in particular, soil macroinvertebrate community. The focus of this dissertation is the effect of LUC with increasing in land use intensity on soil macrofauna, aggregation and SOM allocation. We hypothesized that LUC reduces soil macrofaunal b

APA, Harvard, Vancouver, ISO, and other styles

38

Matlack, Keith Scanlan. "Modeling the interaction of dissolved organic matter with cations." Diss., Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/26215.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Gibson, Richard W. "The characterisation of soluble organic matter from forest soils." Thesis, University of Aberdeen, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295565.

Full text

Abstract:

The characteristics of water-soluble organic material in soil solutions has been studied extensively 'in situ'. Relatively little attention has focused on isolation of such material, particularly when comparison of a number of samples has been attempted. In this study the water-soluble organic acids leached from the soil horizons beneath eight different tree species were isolated by adsorption onto macroporous resins. Amberlite XAD-8 and XAD-4 resins were used in series therefore two samples, labelled as 'hydrophobic' and 'hydrophilic' acids were obtained. Practical amounts of free organic aci

APA, Harvard, Vancouver, ISO, and other styles

40

Payan, Zelaya Fidel Adolfo. "Effects of 'Erythrina poeppigiana' pruning residues on soil organic matter in organic coffee plantations." Thesis, Bangor University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420651.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Florence, Robert J. "Comparing soil testing methods for soil organic matter, lime requirements, and developing a phosphorus soil test correlation." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/18903.

Full text

Abstract:

Doctor of Philosophy<br>Department of Agronomy<br>Dave Mengel<br>The Kansas State University Soil Testing Laboratory currently uses the Walkley-Black (WB) method for soil organic matter (SOM) estimations, the Shoemaker-Mclean-Pratt (SMP) buffer for lime recommendations, and bases the soybean phosphorus (P) critical value for P fertilizer recommendations off other crops. Hazardous waste is produced from WB and SMP creating a health hazard for workers, and substantial cost for handling and disposal. The substantial increase in land area devoted to soybean creates the need to validate currently

APA, Harvard, Vancouver, ISO, and other styles

42

Golchin, Ahmad. "Spatial distribution, chemistry and turnover of organic matter in soils." Title page, contents and summary only, 1996. http://web4.library.adelaide.edu.au/theses/09PH/09phg617.pdf.

Full text

Abstract:

Copies of author's previously published works inserted. Bibliography: leaves 260-299. This thesis describes the concept of organic matter turnover and various methods to measure the decay rates of organic materials in the soil. Methods are developed to separate SOM from different locations within the soil matrix. Free particulate organic matter (POM), located between or outside the soil aggregates is isolated. Occluded POM is disaggregeted by sonification. The compositional differences noted among the three components of SOM are used to describe the changes that OM undergoes during decompositi

APA, Harvard, Vancouver, ISO, and other styles

43

Badea, Silviu-Laurentiu. "Association of hydrophobic organic compounds to organic material in the soil system." Licentiate thesis, Umeå universitet, Kemiska institutionen, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-68378.

Full text

Abstract:

Contaminated soils and sediments have been identified as significant secondary sources of organic contaminants. Leaching tests may be useful tools to estimate the mobility of contaminants via the water phase and thereby the risk for groundwater and surface water contamination. The influence of soil composition (peat and clay content) on the leachability was investigated in batch leaching experiments for chemically diverse hydrophobic organic compounds (HOCs: PCP, PAHs, HCB, HCHs, PCBs, and TCDD/Fs). The above mentioned compounds were analyzed by both GC-LRMS (gas chromatography coupled with l

APA, Harvard, Vancouver, ISO, and other styles

44

Verheijen, Frank G. A. "On-farm benefits from soil organic matter in England and Wales." Thesis, Cranfield University, 2005. http://hdl.handle.net/1826/1006.

Full text

Abstract:

Soil organic carbon (SOC) is increasingly recognised as an important component in the global carbon cycle and as a potential C sequestration pool for mitigation of the enhanced greenhouse effect. Recent appeals have prompted research into the potential of storing C in arable fields and the concomitant impact for on-farm economics. This project was instigated to answer the question “Does soil organic matter (SOM), or its management, provide arable on-farm benefit, in England and Wales?”. A methodological design was developed which integrates social science with soil science. From the National S

APA, Harvard, Vancouver, ISO, and other styles

45

Monson, Jessica Laura Bruse. "A characterization of soil organic matter in Holocene paleosols from Kansas." Thesis, The University of Iowa, 2013. http://pqdtopen.proquest.com/#viewpdf?dispub=1540385.

Full text

Abstract:

<p> Carbon isotope studies are commonly used to provide a proxy for past vegetation communities and for evaluating environmental change. Original studies suggested carbon isotope ratios of soil organic matter (SOM) faithfully preserved the isotopic composition of standing vegetation with little or no modification in the pedogenic and shallow burial environment. Recent studies of modern soils and laboratory experiments suggest that this may not necessarily be the case and that degradation of SOM in the burial environment may alter the original C-isotope ratio of bulk SOM. A first step in addres

APA, Harvard, Vancouver, ISO, and other styles

46

Kiem, Rita. "Characterization of refractory soil organic matter in long-term agroecosystem experiments." [S.l. : s.n.], 2002. http://deposit.ddb.de/cgi-bin/dokserv?idn=967132630.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Cooke, James Daniel. "Towards an accurate model of cation binding by soil organic matter." Thesis, Lancaster University, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.444851.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Nason, Mark A. "Decomposition of tree leaf litter and formation of soil organic matter." Thesis, Bangor University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.409217.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Barajas-Aceves, Martha. "Soil microbial biomass and organic matter dynamics in metal-contaminated soils." Thesis, University of Nottingham, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260604.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Vizard, Catherine. "Soil organic matter quality and nitrogen dynamics in sustainable cropping systems." Thesis, University of Newcastle Upon Tyne, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.289279.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!