Search Results - "Harmand, Jean Michel"

Cocoa agroforest multifunctionality and soil fertility explained by shade tree litter traits by Sauvadet, Marie, Saj, Stéphane, Freschet, Grégoire T., Essobo, Jean‐Daniel, Enock, Séguy, Becquer, Thierry, Tixier, Philippe, Harmand, Jean‐Michel, Magrach, Ainhoa

“…Manipulating plant functional diversity to improve agroecosystem multifunctionality is a central challenge of agricultural systems world‐wide. In cocoa…”
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Quantification of soil organic carbon in particle size fractions using a near-infrared spectral library in West Africa by Cambou, Aurélie, Houssoukpèvi, Issiakou A., Chevallier, Tiphaine, Moulin, Patricia, Rakotondrazafy, Nancy M., Fonkeng, Eltson E., Harmand, Jean-Michel, Aholoukpè, Hervé N.S., Amadji, Guillaume L., Tabi, Fritz O., Chapuis-Lardy, Lydie, Barthès, Bernard G.

“…[Display omitted] •Particle size fraction C in a target set was predicted using a soil NIR library.•Models calibrated with the spectral library could…”
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Long term impact of Acacia auriculiformis woodlots growing in rotation with cassava and maize on the carbon and nutrient contents of savannah sandy soils in the humid tropics (Democratic Republic of Congo) by Dubiez, Emilien, Freycon, Vincent, Marien, Jean-Noël, Peltier, Régis, Harmand, Jean-Michel

“…Rotational woodlots with N 2 -fixing trees may be efficient agroforestry systems, allowing farmers to alternate agricultural and wood-energy production on the…”
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Carbon dynamics in cocoa agroforestry systems in Central Cameroon: afforestation of savannah as a sequestration opportunity by Nijmeijer, Annemarijn, Lauri, Pierre-Éric, Harmand, Jean-Michel, Saj, Stéphane

“…Afforestation of savannah is suggested as an approach to help addressing climate change mitigation through increased carbon (C) storage. Previous studies in…”
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Litterfall seasonal dynamics and leaf-litter turnover in cocoa agroforests established on past forest lands or savannah by Saj, Stephane, Nijmeijer, Annemarijn, Nieboukaho, Jean-Daniel Essobo, Lauri, Pierre-Eric, Harmand, Jean-Michel

“…Nutrient cycling in cocoa agroforestry systems (cAFS) is complex and poorly understood. To better understand the mass flow of carbon and nutrients into the…”
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Symbiotic dinitrogen fixation by trees: an underestimated resource in agroforestry systems? by Nygren, Pekka, Fernández, María P., Harmand, Jean-Michel, Leblanc, Humberto A.

“…We compiled quantitative estimates on symbiotic N 2 fixation by trees in agroforestry systems (AFS) in order to evaluate the critical environmental and…”
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Potential of Bioassays to Assess Consequences of Cultivation of Acacia mangium Trees on Nitrogen Bioavailability to Eucalyptus Trees: Two Case-Studies in Contrasting Tropical Soils by Waithaisong, Kittima, Robin, Agnès, Mareschal, Louis, Bouillet, Jean-Pierre, Harmand, Jean-Michel, Bordron, Bruno, Laclau, Jean-Paul, Gonçalves, José Leonardo Moraes, Plassard, Claude

“…We hypothesized that the nitrogen-fixing tree could improve the growth and nitrogen nutrition of non-fixing tree species such as . We measured the…”
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Managing tree cover to restore farm productivity and build landscape and livelihood resilience in West Africa by Bayala, Jules, Harmand, Jean-Michel

“…Land restoration and sustainable natural resource use are critical societal concerns that impact both the health of ecosystems and human well-being. There is…”
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Shade trees have higher impact on soil nutrient availability and food web in organic than conventional coffee agroforestry by Sauvadet, Marie, den Meersche, Karel Van, Allinne, Clémentine, Gay, Fréderic, de Melo Virginio Filho, Elias, Chauvat, Matthieu, Becquer, Thierry, Tixier, Philippe, Harmand, Jean-Michel

“…Conventional, intensively managed coffee plantations are currently facing environmental challenges. The use of shade trees and the organic management of coffee…”
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Effects of Inga densiflora on the microclimate of coffee (Coffea arabica L.) and overall biomass under optimal growing conditions in Costa Rica by Siles, Pablo, Harmand, Jean-Michel, Vaast, Philippe

“…The advantages of associating shade trees in coffee agroforestry systems (AFS) are generally thought to be restricted mostly to poor soil and sub-optimal…”
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Changes in carbon stock and greenhouse gas balance in a coffee ( Coffea arabica) monoculture versus an agroforestry system with Inga densiflora, in Costa Rica by Hergoualc’h, Kristell, Blanchart, Eric, Skiba, Ute, Hénault, Catherine, Harmand, Jean-Michel

“…► The net atmospheric greenhouse gas (GHG) removal from converting a coffee monoculture to a coffee agroforestry plantation shaded by the N 2-fixing species…”
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Long-term dynamics of cocoa agroforestry systems established on lands previously occupied by savannah or forests by Nijmeijer, Annemarijn, Lauri, Pierre-Eric, Harmand, Jean-Michel, Freschet, Gregoire T., Essobo Nieboukaho, Jean-Daniel, Fogang, Patrick Kenfack, Enock, Seguy, Saj, Stéphane

“…[Display omitted] •Past land-use effects can last for decades in cocoa agroforestry systems (cAFS).•Savannah cAFS (S-cAFS) and forest cAFS (F-cAFS) show…”
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Rainfall partitioning into throughfall, stemflow and interception loss in a coffee ( Coffea arabica L.) monoculture compared to an agroforestry system with Inga densiflora by Siles, Pablo, Vaast, Philippe, Dreyer, Erwin, Harmand, Jean-Michel

“…Partitioning of gross rainfall into throughfall, stemflow and rainfall interception was assessed in Costa Rica during two rainy seasons (mean annual rainfall…”
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Introducing N2-fixing trees (Acacia mangium) in eucalypt plantations rapidly modifies the pools of organic P and low molecular weight organic acids in tropical soils by Waithaisong, Kittima, Robin, Agnès, Mareschal, Louis, Bouillet, Jean-Pierre, Laclau, Jean-Paul, Deleporte, Philippe, Gonçalves, José Leonardo de Moraes, Harmand, Jean-Michel, Plassard, Claude

“…Many studies have shown that introducing N2-fixing trees (e.g. Acacia mangium) in eucalypt plantations can increase soil N availability as a result of…”
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Leaf area index as an indicator of ecosystem services and management practices: An application for coffee agroforestry by Taugourdeau, Simon, le Maire, Guerric, Avelino, Jacques, Jones, Jeffrey R., Ramirez, Luis G., Jara Quesada, Manuel, Charbonnier, Fabien, Gómez-Delgado, Federico, Harmand, Jean-Michel, Rapidel, Bruno, Vaast, Philippe, Roupsard, Olivier

“…•LAI was split by layer in coffee agroforestry system and upscaled using remote sensing.•Ten years dynamics of LAI were monitored and related to Ecosystem…”
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Modelling the continuous exchange of nitrogen between microbial decomposers, the organs and symbionts of plants, soil reserves and the atmosphere by Pansu, Marc, Ibrahim, Hatem, Hatira, Abdessatar, Brahim, Nadhem, Drevon, Jean-Jacques, Harmand, Jean-Michel, Chotte, Jean-Luc, Blavet, Didier

“…Most of the C and N models published over past decades are based on parameters not always linked to the environment and underestimate the role of…”
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Agroecosystem diversification with legumes or non-legumes improves differently soil fertility according to soil type by Sauvadet, Marie, Trap, Jean, Damour, Gaëlle, Plassard, Claude, Van den Meersche, Karel, Achard, Raphaël, Allinne, Clémentine, Autfray, Patrice, Bertrand, Isabelle, Blanchart, Eric, Deberdt, Péninna, Enock, Séguy, Essobo, Jean-Daniel, Freschet, Grégoire T., Hedde, Mickaël, de Melo Virginio Filho, Elias, Rabary, Bodovololona, Rakotoarivelo, Miora, Randriamanantsoa, Richard, Rhino, Béatrice, Ripoche, Aude, Rosalie, Elisabeth, Saj, Stéphane, Becquer, Thierry, Tixier, Philippe, Harmand, Jean-Michel

“…Plant diversification through crop rotation or agroforestry is a promising way to improve sustainability of agroecosystems. Nonetheless, criteria to select the…”
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Dinitrogen fixation by the legume cover crop Pueraria phaseoloides and transfer of fixed N to Hevea brasiliensis—Impact on tree growth and vulnerability to drought by Clermont-Dauphin, Cathy, Suvannang, Nopmanee, Pongwichian, Pirach, Cheylan, Vincent, Hammecker, Claude, Harmand, Jean-Michel

“…•On an N depleted soil, 89% of the legume aboveground N was estimated to be derived from N2 fixation.•Comparison of δ15N values showed that 39–46% of tree leaf…”
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Correction to: Carbon dynamics in cocoa agroforestry systems in Central Cameroon: afforestation of savannah as a sequestration opportunity by Nijmeijer, Annemarijn, Lauri, Pierre-Éric, Harmand, Jean-Michel, Saj, Stéphane

“…The published on-line ms “Carbon dynamics of cocoa agroforestry systems in Central Cameroon: afforestation of savannah as a sequestration opportunity.”…”
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Correction to: Litterfall seasonal dynamics and leaf-litter turnover in cocoa agroforests established on past forest lands or savannah by Saj, Stephane, Nijmeijer, Annemarijn, Nieboukaho, Jean-Daniel Essobo, Lauri, Pierre-Eric, Harmand, Jean-Michel

“…A correction to this paper has been published: https://doi.org/10.1007/s10457-021-00615-9…”
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