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Dissertations / Theses on the topic 'Agronomic modelling'

Author: Grafiati

Published: 7 June 2025

Last updated: 16 July 2025

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1

GABBRIELLI, MARA. "MEASURING AND MODELLING COVER CROP GROWTH AND AGRONOMIC EFFECTS." Doctoral thesis, Università degli Studi di Milano, 2022. https://hdl.handle.net/2434/949531.

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Cover crops are cultivated during the bare soil period between the harvest of a cash crop and the sowing of the next one. Their cultivation puts into effect the permanent soil organic cover principle of conservation agriculture and exerts several agro-ecological services, among which the most relevant are nitrate leaching reduction, weed growth control, soil organic matter increase, soil structure and water infiltration improvement. In temperate climates when crop rotations include summer cash crops (such as maize or soybean), autumn-winter cover crops are sown between late July and October an

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2

Morgado, Goncalves Marques dos Santos Maria Joao. "Factors affecting tillering in rice (Oryza sativa L.) : agronomic, physiological and modelling aspects and their influence on yield." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389652.

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3

Minoli, Sara. "Managing phenology for agronomic adaptation of global cropping systems to climate change." Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21965.

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Der Klimawandel fordert die Anbausysteme heraus, um das derzeitige Produktionsniveau zu verbessern oder sogar aufrechtzuerhalten. Es wird erwartet, dass zukünftige Trends bei Temperatur und Niederschlag die Ernteproduktivität beeinträchtigen. Es ist daher notwendig, möglicher Lösungen zur Anpassung der Anbausysteme an den Klimawandel zu untersuchen. Ziel dieser Arbeit ist es, das Wissen über die Anpassung von weltweit relevanten Getreidepflanzen an den Klimawandel zu erweitern. Die zentrale Fragestellung ist, ob globale Anbausysteme an den Klimawandel angepasst werden können, indem die Phänol

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4

Adesina, Oluwakemi Bolaji. "Biochemical modelling of fruit ripening." Thesis, University of Lincoln, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306376.

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5

Yeh, Der-Ming. "Manipulation and predictive modelling of flowering in cineraria." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309594.

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6

Aldakheel, Yousef Yacoub. "Remote sensing of crop water stress : measurements and modelling." Thesis, University of Salford, 1998. http://usir.salford.ac.uk/43021/.

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7

Parenti, Andrea <1988&gt. "Modelling new sustainable cropping systems for advanced biofuel production." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2020. http://amsdottorato.unibo.it/9298/1/PhD%20Thesis%20Andrea%20Parenti.pdf.

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Through the re-use of empirical functions and new model development, this study aims at contributing to the development of advanced biofuels in Europe. Four lignocellulosic crops were selected and tested in stand-alone (sunn hemp – Crotalaria juncea L.) and rotation system (sunn hemp, biomass sorghum - Sorghum bicolor x Sorghum sudangrass, kenaf - Hibiscus cannabinus L. and industrial hemp - Cannabis sativa L.) in different European environments. The first Chapter deals with a new model development (SunnGro) to reproduce sunn hemp, an interesting summer crop for advanced biofuels in Europe; in

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8

Kocabas, Zahide. "Sensitivity of crop models to climate variations and modelling techniques." Thesis, University of Nottingham, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358287.

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9

Smith, Graham P. "Study of empirical modelling techniques for describing wheat quality in England." Thesis, University of Nottingham, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285455.

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10

Tsegaye, Tezera. "Modelling the effect of variable soil impedance on pea root growth." Thesis, University of Aberdeen, 1992. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU045142.

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Experiments were conducted: (i) to investigate varietal differences in pea (Pisum sativum L.) root response to mechanical impedance, (ii) to study the effect of mechanical impedance on root growth and morphology and (iii) to predict root growth in soils whose mechanical impedance varied temporally and spatially by adapting the Diggle (1988), ROOTMAP, model. Pea varieties whose root growth rates did not differ under unimpeded conditions had their root growth rates reduced by significantly different proportions in response to mechanical impedance. Highly significant correlations between first or

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11

Hossain, A. H. M. Sakhawat. "Mechanisation of wheat production in Bangladesh based on a growth modelling approach." Thesis, University of Newcastle Upon Tyne, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241559.

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12

Farré, i. Codina Inmaculada. "Respuesta del maíz (Zea mays L.) y sorgo (Sorghum bicolor L. Moench) al riego deficitario : agronomía y modelización / Maize (Zea mays L.) and sorghum (Sorghum bicolor L. Moench) response to deficit irrigation :agronomy and modelling." Doctoral thesis, Universitat de Lleida, 1998. http://hdl.handle.net/10803/8243.

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El reg és necessari per tal d'assegurar produccions estables dels cultius d'estiu de zones semiàrides del món, on la precipitació és escassa i irregular. La planificació de l'ús de l'aigua de reg és crucial per a la conservació del recurs i per a la sostenibilitat dels sistemes agrícoles. En condicions d'aigua de reg limitant, l'adopció d'estratègies de reg deficitari pot augmentar l'eficiéncia en l'ús de l'aigua.<br/>Aquesta tesi es centra en l'estudi de la resposta del panís i el sorgo al reg deficitari. Al capítol 2 es presenta l'estudi comparatiu del panís i el sorgo al reg deficitari im

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13

Ghaffari, Abdolali. "Application of geographical information systems (GIS) and crop simulation modelling in sustainable agriculture." Thesis, Imperial College London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.312108.

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14

MOVEDI, ERMES. "MODELLING THE INTERACTION BETWEEN WILD AND CULTIVATED SPECIES." Doctoral thesis, Università degli Studi di Milano, 2023. https://hdl.handle.net/2434/950804.

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Yield losses due to wild species are relevant for a variety of cropping systems worldwide, e.g., in the case of rice weeds they can reach 60%. However, in the broader sense, wild species may also have positive effects on cropping systems for their capability to provide environmental benefits. In fact, they are fundamental to maintain high levels of biodiversity and, in the context of grassland communities, they are crucial for the provision of ecosystem services like those involved with pollination and recreational experiences. A quantitative understanding of the complex and dynamic int

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15

Kiome, Romano Mungiiria. "Soil and water conservation for improved soil moisture and crop production : an empirical and modelling study in semi-arid Kenya." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317585.

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16

Sharif, Zadeh Farzad. "Mechanism and modelling of seed dormancy and germination in Cenchrus ciliaris as affected by different conditions of maturation and storage." Thesis, University of Reading, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288033.

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17

CERRETELLI, STEFANIA. "The role of ecosystem services in the spatial assessment of land degradation: a transdisciplinary study in the Ethiopian Great Rift Valley." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2924524.

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Land degradation is a widespread problem that affects about 1.5 billion people globally. It can be defined as the decline in the productive capacity of the land, and the loss of functionality of ecosystems. Overall, land degradation leads to ecosystem services degradation, because it affects and causes the depletion of several soil functions (e.g. sediment retention, nutrient cycling, carbon stocks, and water retention). Therefore, it is also a constraint in securing food production and it could cause food insecurity. Hence, land degradation represents a considerable problem especially in deve

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18

TADIELLO, TOMMASO. "CARBON SEQUESTRATION UNDER CONSERVATION AGRICULTURE STUDY AND MODELLING OF CARBON DYNAMIC." Doctoral thesis, Università degli Studi di Milano, 2022. https://hdl.handle.net/2434/949412.

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This work aims to improve the existing modelling tools that allow quantifying and evaluating the CA impact on SOC sequestration with a specific link to the ARMOSA cropping system model. This model is a versatile tool to represent the carbon and nitrogen fluxes and the influence of high levels of agroecosystem processes varying in response to agricultural management and pedoclimatic conditions. To define which conservation agriculture practices impact the most on SOC sequestration and to quantify their single impact I reviewed the previous scientific research published between 1998 and 2020 w

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19

Gasparini, Valentina. "Weeds in conservation agriculture. Biology, emergence dynamics and modelling to improve their control." Doctoral thesis, Università degli studi di Padova, 2014. http://hdl.handle.net/11577/3425278.

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The increasing attention of public opinion towards the environmental impact of production activities has made it imperative to reduce the aggressiveness of productive systems on the environment. Also the agricultural sector, considered one of the principal strengths of transformation of the territory, is asked to predispose eco-compatible programmes of production. The institutions and national and international organisms encourage the adoption of techniques of conservative agriculture as a tool for guaranteeing, on the one hand the necessary crop production to face the demand for food of the g

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20

Zanella, Valentina. "Integration of proximal sensing and crop modelling to optimize N variable fertilization on cereals." Doctoral thesis, Università degli studi di Padova, 2016. http://hdl.handle.net/11577/3424408.

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Despite recent advances in agronomical techniques, N fertilization still shows low efficiency (NUE), with consequently high N loss in the environment. This could be particularly relevant in nitrate vulnerable zones, as the Venice Lagoon watershed, in which N leaching represents a serious risk for water pollution. Applying N site specifically accordingly to crop need, N –VRA (variable rate application) represents a strategy to increase NUE. Although this approach has been proved to provide environmental benefit, a drawback in its application arises from the difficulties to predict precisely fin

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21

Perego, A. "MODELLING NITROGEN DYNAMICS IN CROP AND SOIL: FROM SITE-SPECIFIC TO REGIONAL APPLICATION IN NORTHERN ITALY." Doctoral thesis, Università degli Studi di Milano, 2011. http://hdl.handle.net/2434/152911.

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The aim of my Ph.D. work was to investigate the main factors related to N leaching from arable land under different pedoclimatic conditions and cropping systems in Lombardia plain. In situ monitoring and modelling analysis were defined to evaluate the potential N losses via leaching from arable land and the effect of agricultural management. At monitoring sites, representative of Lombardia arable land, data of soil, crop, water, and N-related variables were collected for a period from 2 to 5 years. Soil characterization, crop yield, leaf area index, harvest index, crop nitrogen uptake, soil wa

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22

Negri, Lorenzo <1992&gt. "La biodiversità funzionale del frumento tenero: uno strumento di adattamento per modelli di cerealicoltura a ridotto impatto ambientale." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2022. http://amsdottorato.unibo.it/9990/1/Tesi%20Lorenzo%20Negri_def_upload.pdf.

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Nel contesto dei cambiamenti climatici, al fine di aumentare la resilienza della coltivazione del frumento, risulta necessario comprendere le interazioni e le relazioni tra tecniche agronomiche a basso impatto ambientale e caratteristiche positive delle varietà di frumento. L'obiettivo generale di questo studio è quello di caratterizzare e individuare le varietà di grano più adatte per ridurre l’impatto ambientale della sua coltivazione. Il primo esperimento, di durata triennale, svoltosi presso un'azienda agricola biologica, ha permesso la caratterizzazione di 24 accessioni di grano tenero.

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23

Stella, T. "MODELLING CARBON AND NITROGEN DYNAMICS IN PADDY RICE SYSTEM: IMPACTS ON CROP PRODUCTIVITY AND GREENHOUSE GAS EMISSIONS." Doctoral thesis, Università degli Studi di Milano, 2016. http://hdl.handle.net/2434/347256.

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The main challenge of modern agriculture lies in the need of enhancing crop productivity to guarantee food security while achieving the sustainability of cropping systems in a changing climate. In a recent speech to the 21st Conference of Parties to the United Nations Framework Convention on Climate Change (COP21) held in Paris, the president of the United States declared that for all the challenges we face, the growing threat of climate change could define the contours of this century more dramatically than any other. This is why He hopes that all the countries in the world, united in common

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24

Hanauer, Joana Graciela. "Parâmetros de ajustes dos modelos de desenvolvimento foliar de cana-de-açúcar." Universidade Federal de Santa Maria, 2014. http://repositorio.ufsm.br/handle/1/3228.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior<br>The objectives of this thesis were (i) to identify the expanded leaves number (LNexp) and tips (LNtip) from which there is reduction in the contribution of culm reserves to leaf appearance rate in sugarcane and (ii) the effect of different densities of stem in leaf development in the culture of sugarcane. The experiments were conducted at the experimental area of the Departamento de Fitotecnia, Centro de Ciências Rurais, Universidade Federal de Santa Maria, during the 2012/2013 growing season. The sugarcane clone used was SP 711406

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25

Hulhoven, Xavier. "Bioprocess software sensors development facing modelling and model uncertainties." Doctoral thesis, Universite Libre de Bruxelles, 2006. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210804.

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The exponential development of biotechnology has lead to a quasi unlimited number of potential products going from biopolymers to vaccines. Cell culture has therefore evolved from the simple cell growth outside its natural environment to its use to produce molecules that they do not naturally produce. This rapid development could not be continued without new control and supervising tools as well as a good process understanding. This requirement involves however a large diversity and a better accessibility of process measurements. In this framework, software sensors show numerous potentialities

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26

Kabora, T. K. "Dynamics of water-management systems in historical East African agricultural societies : modelling the long-term ecosystem and socioeconomic interactions in a historical agronomy in Engaruka, Tanzania." Thesis, University of York, 2018. http://etheses.whiterose.ac.uk/22528/.

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The research conducted explored the dynamics of the historical water-management system that was in use at Engaruka, Tanzania, between the 15th to 18th centuries CE, the aim being to model the primary human and environmental factors and their interactions, and to assess how these influenced the development of the system at several spatial and temporal scales. The ABMs developed in this research represent first steps in the integration of archaeological evidence with ABM techniques in order to understand the Engaruka site. This research shows how the integration of data from different sources an

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27

Dal, Ferro Nicola. "Investigating the effects of SOC on soil structure: three-dimensional visualisation and modelling." Doctoral thesis, Università degli studi di Padova, 2012. http://hdl.handle.net/11577/3423348.

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The quantification of soil structure is primordial to determine the effects of management practices on soil environment. Soil structure is influenced by soil organic carbon content (SOC), which is usually recognised as one of the main indicator of soil fertility as it improves structure stability. Complex interactions link the soil structure and SOC that acts as a binding agent promoting aggregation. Several studies focussed on SOC dynamics and the relationship with soil aggregate microporosity, which is usually considered as a surrogate of t

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CHIAZZESE, MURJAL. "Estimation of N2O and CO2 emissions from organic and N fertilizers by coupling field measurements with modelling analysis." Doctoral thesis, Università Cattolica del Sacro Cuore, 2015. http://hdl.handle.net/10280/6529.

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L'effetto dei gas serra sul cambiamento climatico ha portato molti esperti a considerare la riduzione delle emissioni di gas serra come strategia per il riscaldamento globale. In particolare tale fenomeno è causato dall’anidride carbonica (CO2), metano (CH4) e il protossido di azoto (N2O). E 'ampiamente accettato che la principale fonte antropica di gas a effetto serra (tranne CO2) è dovuta alle attività agricole. Lo scopo di questo studio è quello di definire concetti e strumenti per facilitare il settore agricolo a ridurre le emissioni di gas serra. In particolare, abbiamo posto la nostra at

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CHIAZZESE, MURJAL. "Estimation of N2O and CO2 emissions from organic and N fertilizers by coupling field measurements with modelling analysis." Doctoral thesis, Università Cattolica del Sacro Cuore, 2015. http://hdl.handle.net/10280/6529.

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L'effetto dei gas serra sul cambiamento climatico ha portato molti esperti a considerare la riduzione delle emissioni di gas serra come strategia per il riscaldamento globale. In particolare tale fenomeno è causato dall’anidride carbonica (CO2), metano (CH4) e il protossido di azoto (N2O). E 'ampiamente accettato che la principale fonte antropica di gas a effetto serra (tranne CO2) è dovuta alle attività agricole. Lo scopo di questo studio è quello di definire concetti e strumenti per facilitare il settore agricolo a ridurre le emissioni di gas serra. In particolare, abbiamo posto la nostra at

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30

Gilardelli, C. "IMPROVING DECISION SUPPORT TOOLS VIA INTEGRATION OF REMOTELY SENSED DATA IN CROP MODELS." Doctoral thesis, Università degli Studi di Milano, 2018. http://hdl.handle.net/2434/540068.

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La necessità di garantire l’accesso al cibo per una popolazione mondiale in continua crescita, adempiendo al contempo a precisi requisiti ambientali, rappresenta una grande sfida per il settore agroalimentare. Il successo, in questa sfida, può essere garantito da un utilizzo ottimale delle risorse aziendali, raggiungibile attraverso sforzi notevoli volti al monitoraggio e all’analisi del sistema agricolo. I recenti sviluppi in campo satellitare e modellistico, forniscono strumenti adatti allo scopo specialmente in caso di un utilizzo integrato delle due tecnologie. Il progetto di ricerca, ogg

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Aguiar, Jordene Teixeira de. "Influência de variáveis macroclimáticas sobre as principais doenças do arroz." Universidade Federal de Goiás, 2016. http://repositorio.bc.ufg.br/tede/handle/tede/7405.

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Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2017-06-02T11:41:33Z No. of bitstreams: 2 Dissertação - Jordene Teixeira de Aguiar - 2016.pdf: 3048073 bytes, checksum: b062d30a5cf4c2dd3b7a78ebc8a9e2c6 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<br>Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2017-06-02T11:42:03Z (GMT) No. of bitstreams: 2 Dissertação - Jordene Teixeira de Aguiar - 2016.pdf: 3048073 bytes, checksum: b062d30a5cf4c2dd3b7a78ebc8a9e2c6 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5)<b

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Camarotto, Carlo. "Sustainable land management practices in the low-lying Venetian plain: relationship to soil ecosystem services." Doctoral thesis, Università degli studi di Padova, 2019. http://hdl.handle.net/11577/3424694.

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Sustainable land management (SLM) practices, as conservation agriculture (CA) and conventional tillage with cover crops (CC), aimed at balancing competitive agricultural production and environmental protection, have been encouraged throughout the EU through policy and subsidisation. Adoption of SLM practices that regulate biogeochemical cycles, however, requires further study, especially given the effects of local pedo-climatic variability and because middle and long-term effects are not fully understood and may differ from short-term outcomes. For these reasons, in this

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Varella, Alexandre Costa. "Modelling lucerne (Medicago sativa L.) crop response to light regimes in an agroforestry system." Lincoln University, 2002. http://hdl.handle.net/10182/1477.

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The general goal of this research was to understand the agronomic and physiological changes of a lucerne crop in distinct physical radiation environments and to verify the potential of lucerne to grow under shaded conditions. To achieve this, the research was conducted in four main steps: (i) firstly, experimental data collection in the field using two artificial shade materials (shade cloth and wooden slats) under inigated and non-irrigated conditions; (ii) a second experiment with data collection in a typical temperate dryland agroforestry area under non-irrigated conditions; (iii) generatio

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Terseleer, Lillo Nathan. "Bottom-up and top-down controls of diatoms in the Belgian coastal zone, Southern North Sea: combining plankton functional type modelling and trait-based approaches." Doctoral thesis, Universite Libre de Bruxelles, 2014. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209321.

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Les diatomées sont une composante majeure des écosystèmes marins et sont caractérisées par une grande diversité. L’objectif général de cette thèse est d’étudier les facteurs de contrôle des diatomées dans la Zone Côtière Belge (ZCB). Pour ce faire, la modélisation par groupes fonctionnels et l’approche basée sur les traits sont combinées :la première fournit un cadre écosystémique utile pour étudier les interactions des diatomées avec les compartiments biotiques et abiotiques de l’écosystème, et la seconde permet de représenter de façon efficace leur diversité fonctionnelle.<p><p>Dans un premi

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Rosenmund, A. S. "An integrated modelling framework for climate change impact assessment on rice production and evaluation of adaptation strategies. A case study in Mali." Doctoral thesis, Università degli Studi di Milano, 2012. http://hdl.handle.net/2434/170257.

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The aim of this PhD research was to describe an assessment of the potential impacts of climate change as well as climate variability on rice production. It also discusses selected adaptation options within the context of the Malian agriculture. The research centers on an integrated modelling approach (BioMA) to compute current and future (2020, 2050) crop yields in the agricultural region of the Office du Niger (Mali). BioMA – Biophysical Models Application – is a platform for running biophysical models on generic spatial units. The application is based on independent components which allow i

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Viscarra, Riveros Federico Ernesto <1982&gt. "Climate change impacts and efficient adaptation options in the Bolivian agriculture : from crop models to integrated assessments." Doctoral thesis, Università Ca' Foscari Venezia, 2014. http://hdl.handle.net/10579/3966.

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The agricultural sector could be one of the most vulnerable economic sectors to climate change impacts during the coming decades. These impacts are related to change in the growth period, agricultural yields, extreme weather events, change in temperature and precipitation patterns, among others. All these impacts will have consequences on the agricultural production. Given the lack of substantial studies for climate change impacts on agriculture in Bolivia, the thesis dissertation develops an analysis and quantification of climatic change impacts and adaptation options using different model te

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Hrast, Essenfelder Arthur <1987&gt. "Climate change and watershed planning : understanding the related impacts and risks." Doctoral thesis, Università Ca' Foscari Venezia, 2017. http://hdl.handle.net/10579/11975.

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This dissertation consists in studying the possible effects of climate change in watershed management. Specifically, the dissertation explores the possibility of using a Artificial Neural Networks – ANN models coupled with physically based hydrological models as method for improving the description of the regional hydrologic cycle of a watershed by considering the relationships among geophysical and human systems when stressed by both climatic and anthropogenic factors and under long-term time periods. The selected physically-based model is named Soil and Water Assessment Tool -- SWAT, As wa

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De, Mot Laurane. "Mechanisms of cell differentiation during murine embryogenesis: model for specification in epiblast or primitive endoderm and experimental approach in embryonic stem cells." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209375.

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Dans la première partie de cette thèse effectuée en collaboration avec le groupe expérimental de C. Chazaud (Clermont Université), nous avons étudié théoriquement un processus de différenciation cellulaire intervenant avant l’implantation de l’embryon dans l’utérus. Il s’agit de la spécification des cellules de la masse cellulaire interne (MCI) en épiblaste (EPI) et en endoderme primitif (EPr), processus dans lequel les facteurs de transcription Nanog et Gata6 jouent un rôle essentiel. En effet, en absence de Nanog, les cellules de la MCI acquièrent toutes une identité EPr, tandis qu’en absenc

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Paleari, L. "IN SILICO IDEOTYPING: DEFINITION AND EVALUATION OF RICE IDEOTYPES IMPROVED FOR RESISTANCE/TOLERANCE TRAITS TO BIOTIC AND ABIOTIC STRESSORS UNDER CLIMATE CHANGE SCENARIOS." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/483333.

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The development of new cultivars better adapted to specific growing conditions is a key strategy to meet an ever-increasing growing global food demand and search for more sustainable cropping systems. This is even more crucial in the context of a changing climate. Ecophysiological models and advanced computational techniques (e.g., sensitivity analysis, SA) represent powerful tools to analyze genotype (G) by environment (E) interactions, thus supporting breeders in identifying key traits for specific agro-environmental contexts. However, limits for the effective use of mathematical models wit

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MARTANI, ENRICO. "Conversion of perennial cropping systems to arable land: keyelements for an ecologically sustainable transition." Doctoral thesis, Università Cattolica del Sacro Cuore, 2021. http://hdl.handle.net/10280/96576.

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La coltivazione dei sistemi colturali poliennali su terreni marginali combina la produzione sostenibile di biomassa per diversi utilizzi a benefici di carattere ambientale come il sequestro del C atmosferico nel suolo. La limitata longevità di questi sistemi colturali (10-20 anni), fornisce la possibilità di sfruttarli come una tecnica temporanea per rigenerare la fertilità dei terreni marginali e di studiare il loro effetto nel lungo periodo sul carbonio del suolo. Con questa tesi, avevo l'obiettivo di studiare l'effetto della riconversione a coltura annuali dei sistemi agricoli poliennali su

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MARTANI, ENRICO. "Conversion of perennial cropping systems to arable land: keyelements for an ecologically sustainable transition." Doctoral thesis, Università Cattolica del Sacro Cuore, 2021. http://hdl.handle.net/10280/96576.

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La coltivazione dei sistemi colturali poliennali su terreni marginali combina la produzione sostenibile di biomassa per diversi utilizzi a benefici di carattere ambientale come il sequestro del C atmosferico nel suolo. La limitata longevità di questi sistemi colturali (10-20 anni), fornisce la possibilità di sfruttarli come una tecnica temporanea per rigenerare la fertilità dei terreni marginali e di studiare il loro effetto nel lungo periodo sul carbonio del suolo. Con questa tesi, avevo l'obiettivo di studiare l'effetto della riconversione a coltura annuali dei sistemi agricoli poliennali su

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Mama, Adi. "Anthropisation des paysages au Bénin: dynamique, fragmentation et développement agricole." Doctoral thesis, Universite Libre de Bruxelles, 2013. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209532.

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Résumé<p>Afin de mieux comprendre l’anthropisation des paysages au Bénin, la dynamique de l’occupation du<p>sol a été évaluée en zone soudanienne (Nord-Bénin), soudano-guinéenne (Centre-Bénin) et guinéenne (Sud-Bénin) à partir de trois images satellitaires de type Landsat MSS 1972, TM 1986 et ETM+ 2006.<p>Ces trois zones reflètent assez bien le contexte environnemental et humain de la zone intertropicale.<p>L’objectif principal de la présente thèse est de quantifier la dynamique paysagère due à l’anthropisation des paysages de forêts-savanes à partir de la télédétection, du système d’informati

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Martin, Vincent. "Spatial ecology of the persistence and spread of highly pathogenic avian influenza, H5N1 in Southern China." Doctoral thesis, Universite Libre de Bruxelles, 2012. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/209760.

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Les travaux de recherche effectués dans le cadre de cette thèse ont été guidés par le manque d’information et une compréhension limitée des mécanismes épidémiologiques à l’origine de l’émergence et de la diffusion de la grippe aviaire hautement pathogène, souche H5N1 en Chine du Sud, aussi reconnue comme l’épicentre potentiel de l’émergence des virus influenza aviaires à caractères pandémiques. <p>Dans ce cadre, des données spatio-temporelles relatives aux foyers de la maladie ainsi que des données de surveillance virologiques (isolement du virus effectué dans le cadre du système de surveillan

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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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Tarbath, MP. "Impact of clear polymer film on the growth and physiology of maize." Thesis, 2019. https://eprints.utas.edu.au/31469/1/Tarbath_whole_thesis.pdf.

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This thesis investigates the suitability of degradable clear polymer film use to support the production of cold-sensitive crops in Tasmania. Film used in this manner is poorly understood and rarely practiced in Australia but is practiced more widely in cold regions of the northern hemisphere. There has been limited agronomic research conducted in the area of film use to assist crop propagation, and contemporary research efforts in this field focus almost exclusively on film chemistry, particularly in the areas of formulation, spectral properties and degradation rate. Authors currently working

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Zahid, Muhammad Shafiq. "Lucerne performance on duplex soil under Mediterranean climate : field measurement and simulation modelling." 2009. http://hdl.handle.net/2440/56419.

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The experimental work reported in this thesis quantified the productivity of lucerne over a two-year period (2000-2001) for a Mediterranean climate at Roseworthy in South Australia (34°32′S, 138°45′E), and determined associated dynamics for water and nitrogen in duplex soil. Shoot growth of dryland lucerne was limited primarily by the pattern and amount of incident rainfall, but high temperature (30-35oC) also constrained summer production. These high summer temperatures induced greater production when irrigation was applied, but under the normally dry summer conditions high temperatures combi

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Nelson, William. "Investigating resource competition in cereal-legume intercropping systems." Doctoral thesis, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0005-14AA-5.

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(8300103), Shams R. Rahmani. "Digital Soil Mapping of the Purdue Agronomy Center for Research and Education." Thesis, 2020.

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This research work concentrate on developing digital soil maps to support field based plant phenotyping research. We have developed soil organic matter content (OM), cation exchange capacity (CEC), natural soil drainage class, and tile drainage line maps using topographic indices and aerial imagery. Various prediction models (universal kriging, cubist, random forest, C5.0, artificial neural network, and multinomial logistic regression) were used to estimate the soil properties of interest.

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(5930423), Min Xu. "Using Digital Agriculture Methodologies to Generate Spatial and Temporal Predictions of N Conservation, Management and Maize Yield." Thesis, 2019.

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<div>The demand for customized farm management prescription is increasing in order to maximize crop yield and minimize environmental risks under a changing climate. One great challenge to modeling crop growth and production is spatial and temporal variability. The goal of this dissertation research is to use publicly available Landsat imagery, ground samples and historical yield data to establish methodologies to spatially quantify cover crop growth and in-season maize yield. First, an investigation was conducted into the feasibility of using satellite remote sensing and spatial interpolation

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(8071856), Joshua O. Minai. "Utilization of Legacy Soil Data for Digital Soil Mapping and Data Delivery for the Busia Area, Kenya." Thesis, 2019.

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Much older soils data and soils information lies idle in libraries and archives and is largely unused, especially in developing countries like Kenya. We demonstrated the usefulness of a stepwise approach to bring legacy soils data ‘back to life’ using the 1980 <i>Reconnaissance Soil Map of the Busia Area</i> <i>(quarter degree sheet No. 101)</i> in western Kenya as an example. Three studies were conducted by using agronomic information, field observations, and laboratory data available in the published soil survey report as inputs to several digital soil mapping techniques. In the first study,

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