Omari, S., Bouaziz, A., Le Grusse, Ph., Poussin, Jean-Christophe, Ruelle, P.
Depuis un siècle, la création de réseaux collectifs d'irrigation a été un moyen au service de la puissance publique pour atteindre ses objectifs de politique agricole et d'aménagement du...
Omari, S., Bouaziz, A., Le Grusse, Ph., Poussin, Jean-Christophe, Ruelle, P.
Depuis un siècle, la création de réseaux collectifs d'irrigation a été un moyen au service de la puissance publique pour atteindre ses objectifs de politique agricole et d'aménagement du...
Khaledian, M.R., Mailhol, J.C., Ruelle, P., Rosique, J.L.
Crop models are useful tools for integrating knowledge of biophysical processes governing the plant-soil-atmosphere system. But few of them are easily usable for water and yield management especially...
Jamming probabilities for a vacancy in the dimer model (2008)
Poghosyan, V. S., Priezzhev, V. B., Ruelle, P.
Following the recent proposal made by Bouttier et al [Phys. Rev. E 76, 041140 (2007)], we study analytically the mobility properties of a single vacancy in the close-packed dimer model on the square...
Taky, A., Mailhol, J.C., Debbarh, A., Bouarfa, S., Hammani, A., Ruelle, P., ...
La plaine du Gharb présente une double problématique, celle des excès deau en hiver qui mettent en péril les levées et les premières phases des cycles culturaux et, à partir du printemps,...
Taky, A., Mailhol, J.C., Debbarh, A., Bouarfa, S., Hammani, A., Ruelle, P., ...
La plaine du Gharb présente une double problématique, celle des excès deau en hiver qui mettent en péril les levées et les premières phases des cycles culturaux et, à partir du printemps,...
Hanafi, S., ZaÏri, A., Ruelle, P., Le Grusse, P., Ajmi, T.
Lexploitation agricole occupe une position centrale comme objet danalyse pour appréhender les performances des systèmes irrigués. Compte tenu de la diversité des exploitations dans un...
Hanafi, S., ZaÏri, A., Ruelle, P., Le Grusse, P., Ajmi, T.
Lexploitation agricole occupe une position centrale comme objet danalyse pour appréhender les performances des systèmes irrigués. Compte tenu de la diversité des exploitations dans un...
Direct seeding into mulch system and climate change, a case study in the South of France (2008)
Khaledian, M.R., Mailhol, J.C., Ruelle, P., Gonzalez-Camacho, J.M., Rollin, D.
In response to the negative impact of soil degradation under conventional cropping systems with tillage, direct seeding into mulch without tillage and with a cover crop is being developed. Apart from...
Khaledian, M.R., Mailhol, J.C, Ruelle, P., Forest, F., Rollin, R, Mubarak, I., ...
A key principle of no-tillage (NT) system is the retention of crop residues on the soil surface to preserve soil water for crop growth. In response to the negative impact of soil degradation...
Mubarak, I., Angulo-Jaramillo, R., Mailhol, J.C., Boivin, P., Ruelle, P., Khaledian, M., ...
The identification of a temporal variation in soil hydraulic properties in the course of a cropping season subject to drip irrigation can contribute to the improvement of water use efficiency and the...
Améliorer le pilotage des prélèvements d'eau pour l'irrigation : moyens et méthodes (2008)
Bouarfa, S., Ruelle, P., Martinand, P., Abt, V., Champomier, JC.
/ La gestion des prélèvements pour l'irrigation reste conflictuelle chaque été dans de nombreux départements. Le recensement des acteurs en présence et de leur rôle fait apparaître...
Assessment and simulation of water and nitrogen transfer under furrow irrigation (2008)
Crevoisier, D., Popova, Z., Mailhol, J.C., Ruelle, P.
The objective of this study is to simulate water and nitrogen transfers under two furrow irrigation technologies (Every furrow irrigation-EFI and Alternative Furrow Irrigation-AFI) on Chromic Luvisol...
Pair correlations in sandpile model: a check of logarithmic conformal field theory (2007)
Poghosyan, V. S., Grigorev, S. Y., Priezzhev, V. B., Ruelle, P.
We compute the correlations of two height variables in the two-dimensional Abelian sandpile model. We extend the known result for two minimal heights to the case when one of the heights is bigger...
Barzman, M., Bouarfa, S., Bots, P., Ruelle, P., Martinand, P., Caron, P., ...
Irrigation in Poitou-Charentes exemplifies the tensions that exist between agriculture and other societal sectors. To overcome these conflicts, a Community Information System (CIS) for the purpose of...
Khaledian, M.R., Mailhol, J.C, Ruelle, P., Mubarak, I, Lhamar, R., Forest, F., ...
Soil tillage is the guiding component of soil management and consequently has far-reaching implication for agroecosystems. Understanding structures and functions of soil under conventional tillage...
Impacts des pratiques dirrigation sur le ruissellement au niveau de la plaine du Gharb (2006)
Taky, A., Mailhol, J.C., Debbarh, A., Bouarfa, S., Hammani, A., Ruelle, P., ...
La plaine du Gharb s'étend sur une superficie totale d'environ 616 000 ha avec un potentiel irrigable de 250 000 ha. La superficie équipée actuellement en grande hydraulique est d'environ 114 000...
Impacts des pratiques dirrigation sur le ruissellement au niveau de la plaine du Gharb (2006)
Taky, A., Mailhol, J.C., Debbarh, A., Bouarfa, S., Hammani, A., Ruelle, P., ...
La plaine du Gharb s'étend sur une superficie totale d'environ 616 000 ha avec un potentiel irrigable de 250 000 ha. La superficie équipée actuellement en grande hydraulique est d'environ 114 000...
Evaluating direct seeding on mulch at the field scale (2006)
Khaledian, M.R., Ruelle, P., Mailhol, J.C., Delage, L., Rosique, P.
The impact of energy crisis on agriculture has brought an urgent need to reduce the energy consumption, as soil tillage is the most expensive element in crop production. Direct seeding on the mulch...
Sustainability of direct seeding versus conventional tillage (2006)
Khaledian, M.R., Ruelle, P., Mailhol, J.C., Lahmar, R.
Direct seeding durability on the mulch of crop residues (DSM) is questionable for irrigated crop in Mediterranean condition, so conventional tillage (CT) and DSM techniques were implemented in an...
Direct seeding effects : Field tests and crop model simulation (2006)
Khaledian, M.R., Mailhol, J.C., Ruelle, P., Delage, L., Rosique, P.
A field water balance and yield model-PILOTE-based on LAI (Leaf Area Index) simulation was evaluated for corn and durum wheat in Montpellier in the south of France. It was used to simulate the soil...
Rôle du semis direct sur couverture végétale-SCV dans la protection de l'environnement (2006)
Khaledian, M.R., Ruelle, P., Mailhol, J.C., Lahmar, R., Rollin, D., Delage, L., ...
Ben Nouna, B., Zairi, A., Ruelle, P., Slatni, A., Yacoubi, S., Ajmi, T., ...
Actuellement, dans le Maghreb, la disponibilité limitée en eau pour lirrigation nest pas encore prise en compte pour évaluer la demande des agriculteurs et lefficience de lirrigation. En...
Mailhol, J.C., Vodicka, A., Ruelle, P., Slatni, A., Ikama, M.
Quatre systèmes dirrigation gravitaire coexistent dans le périmètre du Moyen-Sebou (Maroc) récemment aménagé en réseaux collectifs : irrigation par submersion, à la planche, à la robta en...
Taky, A., Mailhol, J.C., Debbarh, Abdelhafid, Bouarfa, S., Hammani, A., Zimmer, D., ...
Dans la plaine du Gharb, le plus important périmètre du Maroc est aménagé en grande hydraulique sur 107 000 ha, dont 87 000 ha en irrigation gravitaire et 19 700 ha en irrigation par aspersion....
Ben Nouna, B., Zairi, A., Ruelle, P., Slatni, A., Yacoubi, S., Ajmi, T., ...
Actuellement, dans le Maghreb, la disponibilité limitée en eau pour lirrigation nest pas encore prise en compte pour évaluer la demande des agriculteurs et lefficience de lirrigation. En...
Mailhol, J.C., Vodicka, A., Ruelle, P., Slatni, A., Ikama, M.
Quatre systèmes dirrigation gravitaire coexistent dans le périmètre du Moyen-Sebou (Maroc) récemment aménagé en réseaux collectifs : irrigation par submersion, à la planche, à la robta en...
Taky, A., Mailhol, J.C., Debbarh, Abdelhafid, Bouarfa, S., Hammani, A., Zimmer, D., ...
Dans la plaine du Gharb, le plus important périmètre du Maroc est aménagé en grande hydraulique sur 107 000 ha, dont 87 000 ha en irrigation gravitaire et 19 700 ha en irrigation par aspersion....
Laurent, J.P., Ruelle, P., Delage, L., Zaïri, A., Ben Nouna, B., Adjmi, T.
The TRIME-FM3 (Imko GmbH, Ettlingen, Germany) time domain reflectometry (TDR) handheld instrument combined with the T3 access tube probe is a commercial soil water content (SWC) profiling system. The...
Mailhol, J.C., Ruelle, P., Popova, Z.
Because of the spatial and temporal variability of the advance-infiltration process, furrow irrigation investigations should not be limited to a single furrow irrigation event when using a modelling...
Popova, Z., Mailhol, J.C., Ruelle, P., Varlev, I., Gospodinov, I.
The aim of this paper is to evaluate the impact of distribution uniformity on environment and productivity under furrow irrigation in different agrolandscapes in Europe and propose geographically...
Giry, E., Bouarfa, S., Granier, J., Le Bars, M., Molle, B., Ruelle, P., ...
Several technical support actions in irrigation have been carried out in France. However, very few have been evaluated to determine their actual impact on irrigation practices and their water saving...
Aubertot, J.N., Barbier, J.M., Carpentier, A., Gril, J.J., Guichard, L., Lucas, P., ...
This collective expertise answers to a complex question of joinly French Minister of Agriculture and Fishery (MAP) et French Minister of Ecology and Sustainable Development (MEDD) and based on large...
Koten, G. Van, Wolf, E. De, Ruelle, P., Broeke, J. Van Den
The universal model for predicting lipophilicity based on the mobile order and disorder (MOD) solution thermodynamics was used for the successful prediction of the partition coefficient of 88...
Ruelle, P., Mailhol, J.C., Itier, B.
Evaporation losses during irrigation are evaluated on the basis of literature results and using two simple methods. The first method focuses on the advection phenomenon while the second deals with...
Mailhol, J.C., Vodicka, A., Ruelle, P., Slatni, A., Ikama, M.
Four surface irrigation systems exist within the irrigation district of the Mid-Sebou recently fitted up in a collective network system: basin, borde, "robtta in micro basins or in micro-furrows....
Guide pratique - Irrigation (2003)
In the last fifty years, irrigated areas have more than tripled, reaching two million hectares. As a key factor in the production of agriculture, irrigation has a considerable social and economic...
Quinones Pedroza, H.E., Ruelle, P., Nemeth, I.
Soil water content is a basic data to determine crop evapotranspiration and irrigation requirements. Lysimeters, tensiometers and neutron probe have been widely used for precise measurement of soil...
Scaling fields in the two-dimensional abelian sandpile model (2001)
We consider the isotropic two-dimensional abelian sandpile model from a perspective based on two-dimensional (conformal) field theory. We compute lattice correlation functions for various cluster...
Ruelle, P., Benali, M., Mailhol, J.C., Baqri, A., Taky, A., Zehauf, M.
Farmers have to adapt their cropping pattern to match economical objectives and climatic and/or manpower constraints. Many different choices are possible for irrigated crops. So it appears that the...
Ben Ali, M., Zehauf, M., Enahari, J., Taky, A., Ruelle, P., Baqri, A., ...
This work studies the effect of different hydric systems in cultures of corn, sugar beets, sunflowers and hard wheat. Used treatments, added to the dry one, are expressed in percentage of ETM and in...
Impact of fertilisation practices on nitrogen leaching under irrigation (2001)
Mailhol, J.C., Ruelle, P., Nemeth, I.
The effectiveness of improved irrigation practices in reducing the adverse impact of irrigation on the environment was assessed in this work. Different irrigation and fertiliser treatments were...
Time domain reflectometry (TDR) is more and more frequently used for soil water content measurements in replacement of others techniques as neutron probe. Such observations that can be continuously...
On Discrete Symmetries in su(2) and su(3) Affine Theories and Related Graphs (2000)
Lienart, S., Ruelle, P., Verhoeven, O.
We classify the possible finite symmetries of conformal field theories with an affine Lie algebra su(2) and su(3), and discuss the results from the perspective of the graphs associated with the...
Labbe, F., Ruelle, P., Garin, P., Leroy, P.
The area under irrigated corn has significantly increased in the Charente river basin during the last 10 years. Corn water requirements are maximum in the summer, the period with low water flows and...
Mailhol, J.C., Ruelle, P., Nemeth, I.
Field experiments were carried out over a 2-year period on a loamy soil plot under corn in Montpellier (south-east France). The effectiveness of improved irrigation practices in reducing the adverse...
An operative model has been elaborated in order to analyse the impact of decision making regarding the irrigation of corn under low availability water conditions using a travelling rain gun machine....
Zairi, A., Mailhol, J.C., Nasr, Z., Slatni, A., Ruelle, P.
The efficiency of the irrigation is low due to a lack of levelling and cracking phenomenon even for soils with a low clay content. The size of cracks being governed by the soil water depletion level,...
Ruelle, P., Bouarfa, S., Mailhol, J.C., Vincent, B., Chaumont, C., Ben Ali, M.
This document describes the experimental design and the methodology implemented to adapt references in irrigation and drainage to Gharb Valley context in Marocco with local teams. The experimental...
On parity functions in conformal field theories (1998)
Altschuler, D., Ruelle, P., Thiran, E.
We examine general aspects of parity functions arising in rational conformal field theories, as a result of Galois theoretic properties of modular transformations. We focus more specifically on...
Discrete symmetries of unitary minimal conformal theories (1998)
We classify the possible discrete (finite) symmetries of two--dimensional critical models described by unitary minimal conformally invariant theories. We find that all but six models have the group...
On Parity Functions in Conformal Field Theories (1998)
Altschuler Ruelle, D. Altschuler, P. Ruelle, E. Thiran
We examine general aspects of parity functions arising in rational conformal field theories, as a result of Galois theoretic properties of modular transformations. We focus more specifically on...
Discrete Symmetries of Unitary Minimal Conformal Theories (1998)
P. Ruelle, O. Verhoeven, Chercheur Qualifie Fnrs
We classify the possible discrete (finite) symmetries of two--dimensional critical models described by unitary minimal conformally invariant theories. We find that all but six models have the group Z...
Mailhol, J.C., Ruelle, P., Revol, P.
A water allocation model for crop yield optimization with a limited amount of water is presented. It is based on a water balance model for actual evapotranspiration (ETR) evaluation, and on existing...
Sorghum and sunflower evapotranspiration and yield from simulated leaf area index (1997)
Mailhol, J.C., Olufayo, A., Ruelle, P.
Accurate prediction of evapotranspiration and crop yield is essential for good water management. This paper describes the structure and testing of PILOTE 1.3, an operative water balance model which...
Labbe, F., Ruelle, P., Garin, P., Leroy, P., Mailhol, J.C.
This paper presents a methodology to asses daily water demand at farm level. Farmer's decision are modeled using concepts of "action model" and "action context". The software IRMA simulate irrigation...
Biomass of grain sorghum (Sorghum bicolor L. Moench) under variable water regime (1997)
Olufayo, A., Ruelle, P., Baldy, C., Aïdaoui, A.
Field experimets were carried out for three years in Montpellier, France, in a deep collovial alluvial soil during summer to study biomass production of grain sorghum under water stress. All...
Synthèse des travaux du groupe RNED-AFEID ''Pilotage de l'irrigation'' (1997)
A working team has summarized recent results of research and experimentation on irrigation management so that they can be used by farmers. It is constituted both of researchers and extensionists :...
Bauer, M., Coste, A., Itzykson, C., Ruelle, P.
We examine the proposal made recently that the su(3) modular invariant partition functions could be related to the geometry of the complex Fermat curves. Although a number of coincidences and...
M. Bauer, A. Coste, C. Itzykson, P. Ruelle
We examine the proposal made recently that the su(3) modular invariant partition functions could be related to the geometry of the complex Fermat curves. Although a number of coincidences and...
Operative modeling for actual evapotranspiration assessment : calibration methodology (1996)
Mailhol, J.C., Ruelle, P., Revol, P., Delage, L., Lescot, J.M.
An operative capacity based model for irrigation scheduling is presented. The first version, PILOTE1, is a two reservoir model whose capacities vary with crop root development. Only maximal root...
Sorghum yield, water use and canopy temperatures under different levels of irrigation (1996)
Olufayo, A., Baldy, C., Ruelle, P.
This research was initiated to examine water use of differentially irrigated sorghum (sorghum bicolor (L.) Moench) and to evaluate the plant water stress using canopy temperature measurements. Field...
Pilote : un modèle opérationnel pour déceler l'apparition de stress hydrique (1996)
Mailhol, J.C., Revol, P., Ruelle, P.
Crop water status is necessary for irrigation scheduling : it is obtained from measurements or from modeling. In this paper the two approaches are compared to identify the begining of the stress of a...
In this thesis dissertation, the same methodology is applied under a Mediterranean climate, for three rainfed crops in Tunisia and two experimental studies of irrigated sorghum in France. The spatial...
Revol, P., Kosuth, P., Ruelle, P., Thony, J.L., Vachaud, G., Vauclin, M.
Three methods, disk infiltrometer, GPI (Guelph Pressure Infiltrometer) and drip infiltrometer, have been recently proposed that purport to measure the soil saturated hydraulic conductivity, Ks, and...
Applicability and limitations of irrigation scheduling methods and techniques (1996)
Itier, B., Maraux, F., Ruelle, P., Deumier, J.M.
This paper is a review of irrigation scheduling methods using information given in different papers presented for ICID-FAO Wokshop on "Irrigation scheduling from theory to practice" in Rome in 1995,...
Spectra of Conformal Field Theories with Current Algebras (1995)
Gannon, T., Ruelle, P., Walton, M. A.
This is an elementary review of our recent work on the classification of the spectra of those two-dimensional rational conformal field theories (RCFTs) whose (maximal) chiral algebras are current...
Automorphism Modular Invariants of Current Algebras (1995)
Gannon, T., Ruelle, P., Walton, M.
We consider those two-dimensional rational conformal field theories (RCFTs) whose chiral algebras, when maximally extended, are isomorphic to the current algebra formed from some affine non-twisted...
In this thesis dissertation, the same methodology is applied under a Mediterranean climate, for three rainfed crops in Tunisia and two experimental studies of irrigated sorghum in France. The spatial...
Algebraic Aspects of Abelian Sandpile Models (1994)
The abelian sandpile models feature a finite abelian group G generated by the operators corresponding to particle addition at various sites. We study the canonical decomposition of G as a product of...
Algebraic Aspects of Abelian Sandpile Models (1994)
The abelian sandpile models feature a finite abelian group $G$ generated by the operators corresponding to particle addition at various sites. We study the canonical decomposition of $G$ as a product...
Résistance à la sécheresse du sorgho soumis à différents régimes hydriques (1994)
Baldy, C., Ruelle, P., Olufayo, A., Aldaoui, A.
From 1990 to 1992, grain sorghum cv. Argence, of medium crop duration (120 days) was subjected to water deficits at different phases of its developmental cycle in Montpellier (South of France). The...
Olufayo, A., Baldy, C., Ruelle, P., Aidaoui, A.
Sorghum is one of the few crops resistant to water stress cultivated in summer in the southern France. One of the objectives of the experimental field studies on Sorghum at Montpellier (France) since...
The experiment on which this speech is based is part of the pluriannual Programmed Inciting Action (PIA) the goals of which can be summarized as follows: - to analyze and compare the performances of...
Résistance à la sécheresse du sorgho et gestion optimale de l'eau (1994)
The goal of this study conducted in Lavalette in Montpellier for the Cemagref, the INRA, the CEFE of the CNRS is to achieve a better knowledge of the ecophysiological functioning and response of...
Hydraulic conductivity measurements of the spatial variability of a loamy soil (1994)
Vauclin, M., Elrich, D.E., Thony, J.L., Vachaud, G., Revol, P., Ruelle, P.
The spatial variability of the parameters Kfs and alpha of the exponential form of the hydraulic conductivity has been examined on a bare agricultural soil, by performing surface infiltration...
On the Completeness of the Set of Classical W-Algebras Obtained from DS Reductions (1993)
Feher, L., O'Raifeartaigh, L., Ruelle, P., Tsutsui, I.
We clarify the notion of the DS --- generalized Drinfeld-Sokolov --- reduction approach to classical ${\cal W}$-algebras. We first strengthen an earlier theorem which showed that an $sl(2)$ embedding...
L'utilisation d'indicateurs d'état hydrique pour la conduite des cultures irriguées (1993)
It is more and more necessary to make the best out of irrigation water. Indicators of the water level of the soil, the plant or the groundcover can contribute to improve water management by allowing...
Rational vs Polynomial Character of W$_n^l$-Algebras (1992)
Feher, L., O'Raifeartaigh, L., Ruelle, P., Tsutsui, I.
The constraints proposed recently by Bershadsky to produce $W^l_n$ algebras are a mixture of first and second class constraints and are degenerate. We show that they admit a first-class subsystem...
In the south of France, summer crops suffer from high water deficiency. Crop management with an optimum water amount or to valorize a limited surface requires a good knowledge of its water state....
On the General Structure of Hamiltonian Reductions of the Wznw Theory (1991)
Feher, L., O'raifeartaigh, L., Ruelle, P., Tsutsui, I., Wipf, A.
The structure of Hamiltonian reductions of the Wess-Zumino-Novikov-Witten (WZNW) theory by first class Kac-Moody constraints is analyzed in detail. Lie algebraic conditions are given for ensuring the...
Munoz Pardo, J., Ruelle, P., Vauclin, M.
The spatial variability of a soil moisture and of its components are studied with statistical and geostatistical tools. / Les variations spatiales de l'humidité du sol, de ces composants sont...
TRADITIONAL APPROACHES FOR PROTECTING CEREAL CROPS FROM BIRDS IN AFRICA (1982)
Despite the recent emphasis in Africa by national and regional plant protection organizations to control pest birds, traditional farmers usually are still left to their own initiative, as they have...
Assessment and simulation of water and nitrogen transfer under furrow irrigation
Crevoisier, D., Popova, Z., Mailhol, J.C., Ruelle, P.
The objective of this study is to simulate water and nitrogen transfers under two furrow irrigation technologies (every furrow irrigation (EFI) and alternative furrow irrigation (AFI)) on Chromic...
Khaledian, M.R., Mailhol, J.C., Ruelle, P., Rosique, P.
Crop models are useful tools for integrating knowledge of biophysical processes governing the plant-soil-atmosphere system. But few of them are easily usable for water and yield management especially...