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Serie 2-9; This series was shot on October 28-31, 2019, in Jambi province (Sumatra), during visits I conducted, together with CIRAD researchers Jean Ollivier and Alexis Thoumazeau and partners from rural development NGOs and Jambi University professors, of several places and projects related to agronomic practices in the local oil palm production sector. I also visited, with the invitation of professor Aiyen Tjoa (universities of Jambi and Palu), the EFForTS research project of universities of Jambi and Gottingen, on the effects of landscape transformation associated with the development of rubber and oil palm plantations. The subjects include the warehouse of a local input supplier, a plant nursury, an oil palm mill, the plantation of an independent smallholder (in the area, many of the recent plantations are installed not by firms, but by independent farmers), the delivery of fresh fruits by smallholders to an intermediate collector with his truck, a meteorological station installed for the EFForTS project, plantation workers transported in a truck. I coordinate the research project EXPALMIND on the effects of plantation agriculture on land use and food security, funded by the Mutalim CNRS-INRAE fund in 2019-2021, and this project involved geographers from CNRS-LETG and CIRAD-Systèmes de pérennes, and my participation was part of that project.

URL des Documents de travail : http://centredeconomie.univ-paris1.fr/documents-de-travail-du-ces/; Documents de travail du Centre d'Economie de la Sorbonne 2017.37 - ISSN : 1955-611X; This paper attempts to establish if climate acts as the determinant of destination choice in case of rural-to-rural migration. In the context of climate change where the link between climate and rural income has been well established, it is argued that migrants who move within rural areas choose destinations with more favourable climate conditions allowing for higher incomes. Employing the alternative-specific conditional logit model, this paper shows that such indirect effect of climate on migration destination choice is non-negligible, since one per cent increase in the expected income differentials between origin and destination, attributable to climate, increases the probability of choosing a given destination by at least nine percentage points. On the other hand, distance acts as a constraint for migration, in particular for the poorest individuals who might be inhibited from reaping full benefits of mobility.

Notice n°254433. Projet RELMIN : Le statut légal des minorités religieuses dans l’espace euro-méditerranéen (Ve-XVe siècle). http://www.cn-telma.fr/relmin/extrait254433/

With the modernisation of agriculture in Chongqing, a farm looks satisfied stands in front of his farm.

Serie 2-7; This series was shot on October 28-31, 2019, in Jambi province (Sumatra), during visits I conducted, together with CIRAD researchers Jean Ollivier and Alexis Thoumazeau and partners from rural development NGOs and Jambi University professors, of several places and projects related to agronomic practices in the local oil palm production sector. I also visited, with the invitation of professor Aiyen Tjoa (universities of Jambi and Palu), the EFForTS research project of universities of Jambi and Gottingen, on the effects of landscape transformation associated with the development of rubber and oil palm plantations. The subjects include the warehouse of a local input supplier, a plant nursury, an oil palm mill, the plantation of an independent smallholder (in the area, many of the recent plantations are installed not by firms, but by independent farmers), the delivery of fresh fruits by smallholders to an intermediate collector with his truck, a meteorological station installed for the EFForTS project, plantation workers transported in a truck. I coordinate the research project EXPALMIND on the effects of plantation agriculture on land use and food security, funded by the Mutalim CNRS-INRAE fund in 2019-2021, and this project involved geographers from CNRS-LETG and CIRAD-Systèmes de pérennes, and my participation was part of that project.

Serie 2-8; This series was shot on October 28-31, 2019, in Jambi province (Sumatra), during visits I conducted, together with CIRAD researchers Jean Ollivier and Alexis Thoumazeau and partners from rural development NGOs and Jambi University professors, of several places and projects related to agronomic practices in the local oil palm production sector. I also visited, with the invitation of professor Aiyen Tjoa (universities of Jambi and Palu), the EFForTS research project of universities of Jambi and Gottingen, on the effects of landscape transformation associated with the development of rubber and oil palm plantations. The subjects include the warehouse of a local input supplier, a plant nursury, an oil palm mill, the plantation of an independent smallholder (in the area, many of the recent plantations are installed not by firms, but by independent farmers), the delivery of fresh fruits by smallholders to an intermediate collector with his truck, a meteorological station installed for the EFForTS project, plantation workers transported in a truck. I coordinate the research project EXPALMIND on the effects of plantation agriculture on land use and food security, funded by the Mutalim CNRS-INRAE fund in 2019-2021, and this project involved geographers from CNRS-LETG and CIRAD-Systèmes de pérennes, and my participation was part of that project.

This lecture considers the complexity of challenges of the agricultural transition from the perspective of farmers, who act at the intersection between the ecology, economy and policy. The lecture will start by providing an overview on the resource requirements for our global production chains of life stock and meat, grain and legume farming and say some words on the human diet, and food and feed conversion efficiency of energy-intake through food. This lecture also places a fresh emphasis on the development of local knowledge and locally specific arming and nutrition practices that are adapted to local environments, as a necessary complement to agricultural science striving to make universal claims. This leads on to basic insights on needs for knowledge production in agriculture, and merits and limitations of action research and engaged research, raising questions on how farmers, scientists and citizens might better collaborate to inform choices in food production and consumption. For the future there are some indications on a new trend on new more decentralised governance of the food system including citizen’s involvement in French organic certification and Community based Auditing and citizens science in communities in Australia to work with farmers on reducing environmental impacts and address ensuing trade-offs for farmers as a community.

This article tackles the multi-trip vehicle routing problem with time windows and limited duration. A trip is a timed route such that a succession of trips can be assigned to one vehicle. We provide an exact two-phase algorithm to solve it. The first phase enumerates possible ordered lists of clients which match the maximum trip duration criterion. The second phase uses a Branch and Price scheme to generate and choose a best set of trips so that all customers are visited. We propose a set covering formulation as the column generation master problem, where columns (variables) represent trips. The sub-problem selects appropriate timing for trips and has a pseudo-polynomial complexity. Computational results on Solomon's benchmarks are presented. The computational times obtained with our new algorithm are much lower than the ones recently obtained in the only two studies published on this problem to date.

Contribution au rapport

NatAdGES est un projet de recherches Isite-Industrie en Bourgogne Franche-Comté.Son objectif est la diminution des émissions de gaz à effet de serre (GES) d’origine agricole.; NatAdGES est un projet de recherches Isite-Industrie en Bourgogne Franche-Comté.Son objectif est la diminution des émissions de gaz à effet de serre (GES) d’origine agricole. En priorité, il s'attaque aux émissions par les sols d’oxyde nitreux (N2O). Ce gaz présente en effet un très fort pouvoir radiatif et l’agriculture en est actuellement sa principale source anthropique.En associant des laboratoires des sciences biotechniques (UMRs AgroEcologie, et BioGeoSciences) et des sciences humaines et sociales (UMR TheMa), ainsi que des entreprises du domaine agricole (CMI - Groupe Roullier) et du domaine du numérique (I@D Territoire Digital) et en impliquant les utilisateurs, la profession agricole et les politiques publiques, NatAdGES crée dans le secteur agricole, une dynamique collective nécessaire à la réduction des émissions de GES d’origine anthropique. NatAdGES est labellisé par le pôle de compétitivité Vitagora.NatAdGES ambitionne de valoriser des microorganismes issus des collections de l’INRA et des additifs, issus des travaux de recherche du Centre Mondial de l’Innovation - Groupe Roullier ou développés dans ce projet, pour diminuer l’intensité des émissions de GES par les sols. L’approche proposée s’adresse aux différentes formes d’agriculture (conventionnelle, biologique, …) et permet de comptabiliser et de communiquer les évitements d’émission réalisés.