Tesis sobre el tema "Produits agricoles – Environnement"
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Dos, Santos Cagarelho Nicolas. "Les droits français et européen à l'épreuve de l'innovation scientifique en matière agricole végétale". Thesis, Paris 2, 2016. http://www.theses.fr/2016PA020062.
Texto completoFrench agriculture, which perpetuated an after-war objective of established efficiency criteria, was guided by the search for a greater productivity. This direction, promoted by both the Common Agricultural Policy and the globalisation of the markets, was mostly driven by States with strong agricultural potentials, especially France playing a leading role. This evolution was guided by scientific and technology innovations, carried by three initial promoters: the public authorities, the agricultural sector and industrial groups. Scientific innovations, in an effort to protect the plants and improve the quality of vegetables, triggered a growing involvement of public authorities which faced alerts from environmental activists and increasing public opinion on the matter. The expansion of a national legislation has been followed up over the last twenty years by a growing European regulation. The latter aims at establishing a compromise between health and food safety as well as protecting the environment and industrial progress. It also questions the coherence of the existing legal framework for agricultural crops applied to the French territory, the current legislation on scientific innovations for plant agriculture and it's possible limits. This thesis deals with 'The French and European Law Facing Scientific Innovation for Plant Agriculture'
Payen, Sandra. "Vers une prise en compte de l'eau en tant que ressource et vecteur de pollution dans les ACV de produits agricoles : Développement méthodologique et application à un système de culture pérenne". Thesis, Montpellier, 2015. http://www.theses.fr/2015MONTS119/document.
Texto completoIdentifying the environmental hot spots of agriculture is crucial in a context where humanity has to produce more food and pollute less. Life Cycle Assessment (LCA) is a powerful tool to evaluate the environmental impacts of agricultural systems, but is still fraught with shortcomings, notably for the evaluation of impacts of freshwater use and of salinisation of water and soil. The core complexity lies in the double status of water and soil resources in LCA which are both a resource and a compartment. The three questions answered by the thesis were: How to better assess the impacts associated with water and salts fluxes? What model should be developed for a relevant inventory of field water and salts fluxes? Is the developed model operational for an LCA study on a perennial crop? The first question was answered through a literature review on salinisation impacts in LCA. It revealed the main environmental mechanisms of salinisation, the factors involved, and discussed the soil and water status, notably through a consistent definition of the technosphere and ecosphere boundary. To answer the second question, a critical analysis of water inventory and agri-food LCA databases showed their inadequacy for the LCA-based ecodesign of cropping systems: they provide estimates of theoretical water consumed, rely on data and methods presenting limitations, and do not support the calculation of both consumptive and degradative water use impacts. For the LCA-based ecodesign of cropping systems, the inventory of water flows should be based on a model simulating evapotranspiration, deep percolation and runoff accounting for crop specificities, pedo-climatic conditions and agricultural managements. For herbaceous crops, the FAO Aquacrop model constitutes a relevant and operational model, but no dedicated model is available to-date for perennials. To fill this gap, a tailored and simple model, so called E.T., was elaborated for the inventory of field water and salt flows for annual and perennial crops. The model combines daily water and salts balances, accounting for soil, climate, agricultural practices and possible crop water and salinity stresses. A first testing of the E.T. model demonstrated its discriminating power for agricultural practices and its robustness. Its validity domain can be extended and its accuracy increased thanks to the recommendations provided. E.T. was also tested in the LCA of a Mandarin grown in Morocco. For most impact categories, electricity use for irrigation was the main contributor revealing a water-energy nexus. Water use had a major contribution to damages for all areas of protection. Overall, to further improve the assessment of impacts due to water use (including salinization impacts) we recommend using a more mechanistic and hydrological approach
Tison, Isabelle. "L' autorisation de mise sur le marché des produits à risque pour la santé publique ou l'environnement en droit de l'Union Européenne : étude réglementaire et contentieuse". Versailles-St Quentin en Yvelines, 2014. http://www.theses.fr/2014VERS010S.
Texto completoIn the absence of harmonization, Member States are authorized to prohibit or restrict the free movement of products presenting a risk to public health or to the environment such as drugs, GMOs, or plant protection products. To overcome this antagonism between freedom of movement and risk to public health or environment, the Community has followed different paths, often simultaneously : harmonization of conditions of risk assessment and issuance of national marketing authorizations, centralized authorization procedures at EU level, mutual recognition of national authorizations. This policy generally has succeeded in regard to drugs, and, to some extent, plant protection products. It is a failure in the case of GMOs, as many Member States refuse GM crops still authorised in their territory, in defiance of Community law
Pelzer, Stéphane. "Activité agricole et pollution de l'eau : vers une responsabilité environnementale des exploitants agricoles ?" Thesis, Université de Lorraine, 2013. http://www.theses.fr/2013LORR0116/document.
Texto completoFarming has always been a source of pollution for water. This link has been reinforced by establishing a common Agricultural control Policy in the EU. In fact the common Agricultural Policy is based on productivisme optiminzing the yield of land by using manure as well as fertilizers, polluting water to a High degree.However some reforms and a specific tax legislation have been created in order to reduce harmful effects on agriculture and on water ressources unfurtunately these legal and institutionnal instruments have proved ineffective.Therefore governements have sought to make farmers aware of there responsabilities with regards to pollution. Despite these efforts, the diffuse nature of water pollution has been obstacle to the implementation of such a regime agricultural pollution.Consequently goverments have no choice but to turn to more flexible instruments that allow polluters to be associated to the various mesasures taken to avoid the pollution of water, particurly by getting polluters involved in the procès and making them signe contracts
Decourselle, Thomas. "Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture". Electronic Thesis or Diss., Dijon, 2013. http://www.theses.fr/2013DIJOS033.
Texto completoIn the domain of vineyard precision spraying research, one of the most importantobjectives is to minimize the volume of phytosanitary products ejected bya sprayer in order to be more environmentally respectful with more effectivevine leaf treatments. Unfortunaltely, even if lot of works have been carriedout at a parcel scale, mainly on losses caused by drift, less works have beencarried out at the leaf scale in order to understand which parameters influencethe spray quality. Since few years, recent improvements in image processing,sensitivity of imaging systems and cost reduction have increased the interestof high-speed imaging techniques. Analyzing the behavior of droplets afterimpact with the leaf thanks to high speed imaging technology is a relevantsolution. By this way, we propose a droplets behavior analyzing process invineyard spraying context based on high-speed acquision system combinedwith image processing techniques. This process allows us to extract dropletsparameters. Therefore, a statistical study is processed in order to determinethe effects of droplets parameters on leaf impact or to predict behavior of asingle droplet. Since this behavior is strongly related to leaf surface, we alsopropose to validate a natural leaf roughness characterization method basedon texture analysis
Soobadar, Aneeza. "Impacts agronomiques et environnementaux de l'épandage de vinasse et de cendre de charbon/bagasse sur les terres agricoles de l'Île Maurice". Phd thesis, Université d'Avignon, 2009. http://tel.archives-ouvertes.fr/tel-00464233.
Texto completoGrimbuhler, Sonia. "Contribution à l'évaluation de l'exposition aux produits phytosanitaires des professionnels par la voie respiratoire". Rennes 1, 2005. http://www.theses.fr/2005REN1S152.
Texto completoThevenot, Gaël. "De la prévention des risques au changement des pratiques agricoles : les limites du droit de la protection phytosanitaire". Thesis, Nice, 2014. http://www.theses.fr/2014NICE0040/document.
Texto completoPlant protection products, also known as pesticides, are used to fight against offensive organisms on plants. By doing so, they also guarantee crop yield and food supplying. French legal framework has been genuinely built to ensure market efficiency to these products even before trying to limit their impact on health and environment. With the community thematic strategy on sustainable use of pesticides, its objective gets more aspiring as it now concerns the reduction of farming dependency on pesticides. But more than reducing the use of these products, it becomes necessary to implement new practices. Moreover, new agronomical methods have to be set up against pest emergence and its uncontrolled growth. Although market rules on plant protection products, which are in the core of the legal package, do lower the risk on health and environment, they hardly reach this goal. It is the same analysis with the yet promising legal framework on pesticides use. Calling on the entire resources of agricultural law becomes necessary in order to redirect farming practises. In spite of the help from both market instruments and the very structuring framework of the common agricultural policy, the growing integration of health and environmental concern stays at an unsufficient level to substantially change these practices
Cadel, Maëlys. "Relations entre production agricole, services écosystémiques et impacts liés au fonctionnement du sol : Quels effets de systèmes de culture plus autonomes en azote en contexte de changement climatique ?" Electronic Thesis or Diss., Orléans, 2023. http://www.theses.fr/2023ORLE1076.
Texto completoAgricultural soils provide many ecosystem services (ES) to farmers and Society such as green and blue water provision, nutrient provision to crops, water quality regulation, carbon sequestration etc. However, most cropping systems are still intensively managed, based on chemical inputs, with little to no consideration of the possible effects of such practices on the environment and the ability of soils to provide these ES. One issue of agroecological transition is to design more sustainable production systems, with limited use of chemical inputs, that provide and benefit from biodiversity and the ES support of agricultural production. We thus need to improve our knowledge on the spatio-temporal relationships that may exist between management practices, agricultural production, ES and environmental impacts. This manuscript synthesizes the results of a three years INRAE-ANDRA collaboration that aimed at providing key information on soil-crop functioning while facing this challenge. This work was structured into two parts. We first conducted a systematic literature review of the relationships between agricultural production, the ES and the impacts linked to soil functioning, within temperate annual production systems. In order to be able to compare the results of the 40 studies selected, we developed a new ontology of soil-based ES and impacts. This review evidenced mainly non-significant relationships between Biomass production and the ES and impacts investigated suggesting that there is no systematic trade-off between agricultural production and regulating ES. We also identified key relationships that have never been investigated in the studies selected as those between C sequestration and Physical soil quality regulation or Soil biodiversity. Also, an analysis of the effects of drivers of these ES revealed that the three pillars of conservation agriculture, as well as organic fertilization, seem promising practices to provide balanced bundles of ES. We then performed simulation analyses of actual and agroecological cropping systems of the French long-term Environmental Observatory of ANDRA. The objectives were to assess the effects of more N self-sufficient cropping systems, with a climate change mitigation purpose, on the temporal relationships between agricultural production, 5 ES and 3 impacts linked to soil functioning. These cropping systems were designed by implementing three agroecological management practices: a) long cover crops with legume (crimson clover), b) grain legumes (pea) and c) fodder legumes (alfalfa). To assess the performances of these systems, we used the STICS model, that simulates the functioning of the soil-crop system at a daily time-step. Simulations were run over two 20-years time periods: a first one for recent past climate (2000-2021) and a second one for future climate projection using RCP 8.5 (2036-2057). If most of the temporal relationships analysed were non-significant, results highlighted that the use of long cover crops in the rotation provided the highest values of N provision to crops and C sequestration and the lowest values of NO3 lixiviation
Le, Bars Maureen. "Devenir du zinc des produits résiduaires organiques après méthanisation et recyclage agricole : rôle des nanoparticules de sulfure de zinc". Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0034.
Texto completoAgricultural recycling of organic waste (OW), raw or after a treatment like anaerobic digestion (AD) and/or composting is common. It is necessary to assess the environmental impact of OW agricultural recycling after anaerobic digestion since this technology is gaining interest, particularly regarding zinc, an abundant element in OW. In order to properly evaluate the risk, zinc speciation must be known. First, we have shown that AD promote the formation of nano-ZnS that is therefore the main species of Zn (> 70%) in AD digestates. This unstable species is transformed during composting of 1 to 3 months. Size and strain are parameters that can explain nanocrystals reactivity. We showed that the more nano-ZnS are small and the higher the strain is. Interaction with thiol containing organic molecules, potentially present in anaerobic digesters, release nano-ZnS structural strain and control its growth. Finally, amended soil characteristics have a key role for nano-ZnS fate: the components of clayey and iron-oxide-rich soils are able to immobilize Zn released by nano-ZnS dissolution, unlike sandy soils components. This work gives a better understanding of zinc dynamics in cultivated ecosystems subject to spreading of organic waste
Prévost, Philippe. "Le concept de régulation biologique et la formation professionnelle des agriculteurs : études didactiques". Lyon 1, 1997. http://www.theses.fr/1997LYO10028.
Texto completoKadhel, Philippe. "Pesticides aux Antilles : impact sur la fonction de reproduction". Antilles-Guyane, 2008. http://www.theses.fr/2008AGUY0212.
Texto completoReproductive function is known to be sensitive to the effects xenobiotics. The agricultural activies of the French West indies lead to a very hight rate of pesticide use. Individuals professionally exposed to pesticides are at risk. Moreover, the use of chlordecone in the past has caused persistent pollution of the natural environment and the contamination of food products. This raises questions and concerns regarding the potential effects on health in the population as a whole. We investigated, in Guadeloupe, the consequences of pesticide use for the fertility of individuals working on banana plantations. We stutied reproductive function in male ship rats from two ecosystems with different levels of pesticide pollution. We also stutied the level contamination of the population (agricultural workers, pregnant women and neonates) with chlordecone and other persistent pollutants. Finally, we evaluated the incidence of gynaecological cancers. The fertility of agricultural workers (sperm analyses and reproductive hormones) did not seem to be affected by the pesticides currently in use, and were not correlated with blood chlordecone concentration. Chlordecone was the persistent pollutant most frequently detected but concentrations were lower than those associated to toxic effects at Hopewel. The study of wild shpi rats showed the potential problems and limitation of the use of this model as a sentinel species. The incidence gynaecological cancers appears to be consistent with expectations, taking into account the socio-cultural, economic, ethno-geographic and health characteristics of Guadeloupe
Grima, Sophie. "Biodégradation de matériaux polymères à usage agricole : étude et mise au point d'une nouvelle méthode de test, analyse des produits de dégradation et impact environnemental". Toulouse, INPT, 2002. http://www.theses.fr/2002INPT028G.
Texto completoTachon, Nadine. "Nouveaux types de liants routiers à hautes performances, à teneur en bitume réduite par addition de produits organiques issus des agroressources". Toulouse, INPT, 2008. http://ethesis.inp-toulouse.fr/archive/00002719/01/tachon.pdf.
Texto completoBitumen and its use in road engineering have been studied to substitute flux oil by biomass byproducts. Adding vegetable oil emulsion stabilized by natrium oleat to hot bitumen enables bituminous binder foam expansion. By optimizing surfactant rate, water to oil ratio and water quantity, we formulated an emulsion allowing formation of bituminous foam and expansion ratio increase. This binder in foaming form, was used at a lower than 120°C temperature to prepare bituminous coatings or to reuse old bituminous coatings. The vegetable oil, part of the binder, should reactivate old bitumen. Some experiments carried out on old bituminous coatings have shown the potential of this new binder. An advanced analytical study with high resolution mass spectrometry have been carried out
Chen, Haotian. "Effets à long terme d'apports répétés de produits résiduaires organiques en agriculture sur la production agricole et la fertilité des sols : apports des résultats de deux essais au champ de longue durée en France". Electronic Thesis or Diss., université Paris-Saclay, 2023. http://www.theses.fr/2023UPASB030.
Texto completoFertilizers play a crucial role in ensuring global food security. However, mineral fertilizer production relies on non-renewable resources, and their excessive use result in environmental and health issues. Recycling organic waste (OW) in agriculture can improve soil fertility and substitute mineral fertilizers. This work aims to assess the long-term effects of repeated applications of OW in agriculture and their driving factors. We used two French long-term field experiments testing various OW representative of frequently used OW in periurban agriculture (urban composts, farmyard manure and sewage sludge) with two different cropping system, soil and climate conditions. Specifically, we investigated i) the dynamics of crop yields and soil properties, ii) the driving factors behind changes in crop yields and soil properties, and iii) the differences of the effects between the different types of OW and the two sites. Overall, our study has shown the potential benefits and limitations of using OW in agriculture. Long-term applications of OW mainly improve soil chemical fertility without negatively impacting soil biological activity. The extent to which OW can improve soil properties may be constrained in soils that are already fertile. A partial substitution of mineral fertilizers is possible without decreasing crop yields. However, applying OW alone at European regulatory rates may not be sufficient for achieving optimal yields. Additionally, the influence of OW application on soil properties and crop yield heavily depends on several factors, especially on the input fluxes of carbon and nutrients related to the type of OW and to the application rate, and on the initial soil properties. Nevertheless, integrating OW recycling into a wider range of sustainable agricultural practices can be a judicious strategy for enhancing soil fertility and improving crop productivity
Sauget, Nicole. "Agro-écosystème et société : la diversité des façons de produire des agriculteurs dans les coteaux de Gascogne". Paris 10, 1996. http://www.theses.fr/1996PA100005.
Texto completoLacas, Jean-Guillaume. "Processus de dissipation des produits phytosanitaires dans les zones tampons enherbées : étude expérimentale et modélisation en vue de limiter la contamination des eaux de surface". Montpellier 2, 2005. http://www.theses.fr/2005MON20127.
Texto completoFam, Papa Gueye. "Marchés des matières premières agricoles et dynamique des cours : un réexamen par la financiarisation". Electronic Thesis or Diss., Toulon, 2016. http://www.theses.fr/2016TOUL2002.
Texto completoFaced with instability of agricultural commodities’ prices and its consequences especially for developing countries, the first part of this thesis is devoted to the presentation of food commodities’ prices, including recent developments with respect to the offering, taking into account the consequences of global warming and demand, as well as the importance of biofuels. It is also question to present the financialization of economies, and the doubts that take over the role of speculation on the futures markets or the implementation of monetary policies, on the spot prices observed on physical agricultural commodities markets. Following the advanced literature reflections and elements, the second part proceeds of two empirical studies, the first one focused on the impact of speculation about the financial futures markets on the underlying asset’s price (agricultural), while the second one examines the role of money markets through the capacities of the central banker to stabilize short-term interest rates. On this basis, conclusions but also future research are established due to the continuation of the economies financialization process
Guérin, Dachkevitch Nathalie. "Emissions de N2 O par les sols cultivés : effets de la teneur en nitrate et de la température". Dijon, 1999. http://www.theses.fr/1999DIJOS081.
Texto completoKamergi, Najla. "Upstream and downstream agri-environmental regulations : cross-country differences, determinants and trade effects". Electronic Thesis or Diss., Toulon, 2021. http://www.theses.fr/2021TOUL2006.
Texto completoThis thesis investigates the relationship between international agricultural trade and standards intended to protect the environment, considering both upstream and downstream measures. The work is structured around three chapters. In the first one, we analyze the network of environmentally-related non-tariff measures. Chapter 2 investigates the stringency and the determinants of agri-environmental regulations by measuring their efficiency in a large panel of 108 countries during the period 2003-2013. The last chapter examines the effects of agri-environmental regulations’ stringency and heterogeneity on the intensive margin of trade between 108 countries over the same period. To this end, we used non-parametric and econometric approaches. We employ the network analysis in the first chapter whereas we use a non-parametric frontier model and the double bootstrapped truncated regression in chapter two. In chapter three, we use a theoretically justified gravity model of trade.Our findings indicate that trade growth of southern countries has been conducive to rising environmentally-related trade conflicts. While Latin American and Southeast Asian countries are increasingly asserting themselves as major suppliers for many regions of the world, our results reveal new environmentally-related conflictual relation targeting developing and emerging countries on one side and increasingly spreading within southern agro-producers on the other. Further results show that the sector of crops has witnessed globally an increasing trend in average agri-environmental efficiency. An intriguing finding is that agricultural trade openness and the specialization in crop commodities’ exports hamper the inefficiency, supporting therefore the “environmental gains-from-trade” hypothesis. In addition, our results show that environmentally-related NTMs turn out to be levers for enhancing the agri-environmental performance of exporters, especially in the BRICS and high as well as middle-income countries. Nonetheless, low income countries react differently and record a deteriorating agri-environmental performance due to environmentally-related NTMs. We also show that the stringency of environmental regulations turns out to be trade reducing in the CAIRNS group, supporting thereby the pollution haven hypothesis. By contrast, rigorous agri-environmental policies have a significant trade-enhancing effect on bilateral agricultural exports of the EU and the USA. Surprisingly, low and middle income countries support also the Porter hypothesis, suggesting that strict environmental regulations can enhance their competitive advantage against foreign rivals. Finally, we conclude that difference in exporter and importer environmental regulations is more relevant to agricultural trade than trade agreements. However, trade effects vary according to the income groups of exporting and importing countries
Fam, Papa Gueye. "Marchés des matières premières agricoles et dynamique des cours : un réexamen par la financiarisation". Thesis, Toulon, 2016. http://www.theses.fr/2016TOUL2002/document.
Texto completoFaced with instability of agricultural commodities’ prices and its consequences especially for developing countries, the first part of this thesis is devoted to the presentation of food commodities’ prices, including recent developments with respect to the offering, taking into account the consequences of global warming and demand, as well as the importance of biofuels. It is also question to present the financialization of economies, and the doubts that take over the role of speculation on the futures markets or the implementation of monetary policies, on the spot prices observed on physical agricultural commodities markets. Following the advanced literature reflections and elements, the second part proceeds of two empirical studies, the first one focused on the impact of speculation about the financial futures markets on the underlying asset’s price (agricultural), while the second one examines the role of money markets through the capacities of the central banker to stabilize short-term interest rates. On this basis, conclusions but also future research are established due to the continuation of the economies financialization process
Giacinti, Géraldine. "Etude du transport de molécules bioactives dans l'épiderme de fruits à pépins(Rosacea Juss) : mise au point et développement d'un procédé d'extraction de produits phytosanitaires". Thesis, Toulouse, INPT, 2016. http://www.theses.fr/2016INPT0085.
Texto completoFor more than fifty years, the modern agriculture uses lots of products for crop protection in order to ensure optimum yields and to limit pathogens harmful for human or animal health. Until recently, the levels of pesticides in foodstuffs (fruits, vegetables, cereals, forage crops, processed food…) were controlled but usually not problematic regarding the effects over time. Nowadays, more and more drastic requirements are appearing and becoming widespread. The products from farming and food industries must satisfy stricter and stricter standards in terms of residues for maintaining competitiveness. Particularly, for apples, whose treatments per season are among the highest in France, requirements tend to the zero detectable residue. The strategy of this work deals with, on one hand, the understanding of the transfert stages involved at the outer surface of the fruit. A physicochemical characterizations of epiderms of different apples led to the identification of the structures involved in the relationship between bioactive molecule and biopolymeric matrix. Fludioxonil was chosen for modelization for its frequency of use and for its atomic composition (fluorine). The epiderms of Fuji apples were selected as the matrix-model. On the other hand, a chemically treatment process of apples was studied and developed to release the residues of 12 pesticides among the most currently used in apple orchards of Midi-Pyrenees. Three varieties of apples among the most popular in France were selected for their different periods of harvest corresponding to variable pests risks. The results led to a possible scheme of desorption of bioactive molecules in the biopolymeric matrix, based on the theory of solubility developed by Hildebrandt and Hansen. In addition, the development of an analytical mehtod of quantitation of pesticides in the epidermal matrix of apples by gas chromatography coupled with mass spectrometry ion trap (GC/MS2) highlighted that : 1- the increase of the concentrations of the analytes of interest over the limits of detection of the applied analytical method promoted the quantitation of very low traces, even ultratraces ; 2- the analytes of interest concurrently underwent negative matrix effects. A strong interaction between some matrix analytes with pesticides was demonstrated and a mehtod of cleanup based on the hyphenation of high performance thin layer chromatography with GC/MS2 (HPTLC/GC/MS2) was suggested to minimize the negative matrix effects in that kind of concentrated matrix extracts
Decourselle, Thomas. "Etude et modélisation du comportement des gouttelettes de produits phytosanitaires sur les feuilles de vignes par imagerie ultra-rapide et analyse de texture". Phd thesis, Université de Bourgogne, 2013. http://tel.archives-ouvertes.fr/tel-00949360.
Texto completoSabatier, Damien. "Influence des facteurs agro-climatiques sur les modalités d'allocation de la biomasse produite aux différentes composantes lignocellulosiques des structures de la canne à sucre". Phd thesis, AgroParisTech, 2012. http://pastel.archives-ouvertes.fr/pastel-00944800.
Texto completoLemay, Bélisle Catherine. "Une gestion stratégique des biosolides papetiers pour lutter contre les changements climatiques : l’épandage agricole produit-il moins d’émissions de gaz à effet de serre que l’enfouissement?" Thèse, 2016. http://constellation.uqac.ca/4057/1/LemayBxE9lisle_uqac_0862N_10246.pdf.
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