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Dive into the research topics where Julie Constantin is active.

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Featured researches published by Julie Constantin.


PLOS ONE | 2016

Impact of Spatial Soil and Climate Input Data Aggregation on Regional Yield Simulations

Holger Hoffmann; Gang Zhao; Senthold Asseng; Marco Bindi; Christian Biernath; Julie Constantin; Elsa Coucheney; R. Dechow; Luca Doro; Henrik Eckersten; Thomas Gaiser; Balázs Grosz; Florian Heinlein; Belay T. Kassie; Kurt Christian Kersebaum; Christian Klein; Matthias Kuhnert; Elisabet Lewan; Marco Moriondo; Claas Nendel; Eckart Priesack; Hélène Raynal; Pier Paolo Roggero; Reimund P. Rötter; Stefan Siebert; Xenia Specka; Fulu Tao; Edmar Teixeira; Giacomo Trombi; Daniel Wallach

We show the error in water-limited yields simulated by crop models which is associated with spatially aggregated soil and climate input data. Crop simulations at large scales (regional, national, continental) frequently use input data of low resolution. Therefore, climate and soil data are often generated via averaging and sampling by area majority. This may bias simulated yields at large scales, varying largely across models. Thus, we evaluated the error associated with spatially aggregated soil and climate data for 14 crop models. Yields of winter wheat and silage maize were simulated under water-limited production conditions. We calculated this error from crop yields simulated at spatial resolutions from 1 to 100 km for the state of North Rhine-Westphalia, Germany. Most models showed yields biased by <15% when aggregating only soil data. The relative mean absolute error (rMAE) of most models using aggregated soil data was in the range or larger than the inter-annual or inter-model variability in yields. This error increased further when both climate and soil data were aggregated. Distinct error patterns indicate that the rMAE may be estimated from few soil variables. Illustrating the range of these aggregation effects across models, this study is a first step towards an ex-ante assessment of aggregation errors in large-scale simulations.


Agriculture, Ecosystems & Environment | 2010

Effects of catch crops, no till and reduced nitrogen fertilization on nitrogen leaching and balance in three long-term experiments

Julie Constantin; Bruno Mary; F. Laurent; G. Aubrion; A. Fontaine; P. Kerveillant; Nicolas Beaudoin


Environmental Modelling and Software | 2015

Accuracy, robustness and behavior of the STICS soil-crop model for plant, water and nitrogen outputs

Elsa Coucheney; Samuel Buis; Marie Launay; Julie Constantin; Bruno Mary; Iñaki García de Cortázar-Atauri; Dominique Ripoche; Nicolas Beaudoin; Françoise Ruget; Kasaina Sitraka Andrianarisoa; Christine Le Bas; Eric Justes; Joël Léonard


Environmental and Experimental Botany | 2010

Changes in plant morphology and dry matter partitioning caused by potassium deficiency in Gossypium hirsutum (L.)

Edward Gérardeaux; Lionel Jordan-Meille; Julie Constantin; Sylvain Pellerin; Michaël Dingkuhn


Plant and Soil | 2011

Cumulative effects of catch crops on nitrogen uptake, leaching and net mineralization

Julie Constantin; Nicolas Beaudoin; François Laurent; Jean-Pierre Cohan; Florent Duyme; Bruno Mary


Agriculture, Ecosystems & Environment | 2012

Long-term nitrogen dynamics in various catch crop scenarios: Test and simulations with STICS model in a temperate climate

Julie Constantin; Nicolas Beaudoin; Marie Launay; J. Duval; Bruno Mary


European Journal of Agronomy | 2015

Crop rotation modelling—A European model intercomparison

Chris Kollas; Kurt Christian Kersebaum; Claas Nendel; Kiril Manevski; Christoph Müller; Taru Palosuo; Cecilia M. Armas-Herrera; Nicolas Beaudoin; Marco Bindi; Monia Charfeddine; Tobias Conradt; Julie Constantin; Josef Eitzinger; Frank Ewert; Roberto Ferrise; Thomas Gaiser; Iñaki García de Cortázar-Atauri; Luisa Giglio; Petr Hlavinka; Holger Hoffmann; Munir P. Hoffmann; Marie Launay; Remy Manderscheid; Bruno Mary; Wilfried Mirschel; Marco Moriondo; Jørgen E. Olesen; Isik Öztürk; Andreas Pacholski; Dominique Ripoche-Wachter


Climate Research | 2015

Effect of weather data aggregation on regional crop simulation for different crops, production conditions, and response variables

Gang Zhao; Holger Hoffmann; L.G.J. van Bussel; Andreas Enders; Xenia Specka; Carmen Sosa; Jagadeesh Yeluripati; Fulu Tao; Julie Constantin; Hélène Raynal; Edmar Teixeira; Balázs Grosz; Luca Doro; Zhigan Zhao; Claas Nendel; Ralf Kiese; Henrik Eckersten; Edwin Haas; Eline Vanuytrecht; Enli Wang; Matthias Kuhnert; Giacomo Trombi; Marco Moriondo; Marco Bindi; Elisabet Lewan; Michaela Bach; Kurt Christian Kersebaum; Reimund P. Rötter; Pier Paolo Roggero; Daniel Wallach


Plant and Soil | 2009

Effect of carbon assimilation on dry weight production and partitioning during vegetative growth

Edward Gérardeaux; Etienne Saur; Julie Constantin; Annabel Porté; Lionel Jordan-Meille


Climate Research | 2015

Variability of effects of spatial climate data aggregation on regional yield simulation by crop models

Holger Hoffmann; Gang Zhao; L.G.J. van Bussel; Andreas Enders; Xenia Specka; Carmen Sosa; Jagadeesh Yeluripati; Fulu Tao; Julie Constantin; Hélène Raynal; Edmar Teixeira; Balázs Grosz; Luca Doro; Zhigan Zhao; Enli Wang; Claas Nendel; Kurt-Christian Kersebaum; Edwin Haas; Ralf Kiese; Steffen Klatt; H. Eckersten; Eline Vanuytrecht; Matthias Kuhnert; Elisabet Lewan; Reimund P. Rötter; Pier Paolo Roggero; Daniel Wallach; Davide Cammarano; Senthold Asseng; Gunther Krauss

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Bruno Mary

Institut national de la recherche agronomique

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Hélène Raynal

Institut national de la recherche agronomique

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Nicolas Beaudoin

Institut national de la recherche agronomique

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Elisabet Lewan

Swedish University of Agricultural Sciences

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Marco Bindi

University of Florence

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