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Valentin Pret

@pret-v.bsky.social
59 followers 61 following 7 posts

PhD candidate in agronomy at WUR & Cirad Fieldwork in Zimbabwe 🇿🇼 Smallholder farms | Climate risk | Sustainable intensification | Crop modelling

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Valentin Pret @pret-v.bsky.social · 05/03/2026
I’m excited to share that I have started a new position as a #Postdoctoral Researcher at #CIRAD, within the SELMET research unit, working on the SLAM-B project. Over the next two years, I will develop a generic conceptual model of livestock systems for territorial modelling.
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Agronomy for Sustainable Development @asd-inrae.bsky.social · 15/01/2026
Lairez, J., Bakker, T., d’Anfray, A. et al. Farm motorization and expansion in Sub-Saharan Africa lead farmers to intensify legume cropping systems. Agron. Sustain. Dev. 46, 9 (2026). doi.org/10.1007/s135... #AgroecologicalTransition #FamilyFarming
doi.org
Farm motorization and expansion in Sub-Saharan Africa lead farmers to intensify legume cropping systems - Agronomy for Sustainable Development
In certain Sub-Saharan African countries, a transition is underway that involves increased motorization and herbicide use. This study is the first to investigate whether these recent changes are trans...
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Rémi Cardinael @remicardinael.bsky.social · 03/10/2025
Can soil-crop models mostly tested in temperate conditions be relevant under tropical conditions to simulate long-term #soilorganiccarbon #yields? A study based on 4 trials in Kenya 🇰🇪 @mcorbeels.bsky.social @gatienfalconnier.bsky.social @johansix.bsky.social authors.elsevier.com/sd/article/S...
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Rémi Cardinael @remicardinael.bsky.social · 13/08/2025
New #openaccess paper from the PhD thesis of @souleymanejules.bsky.social 👏 ! We monitored during 2 years surface albedo in conventional tillage, no tillage, & no tillage with mulch (maize residues) at 2 long-term experiments in Zimbabwe, and having 2 different soil types: doi.org/10.1016/j.st...
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Dr. Serge Zaka @sergezaka.bsky.social · 17/07/2025
La Une de Libération du 18 juillet 2025. Versus la Mer de Glace en 1950.
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IPCC @ipcc.bsky.social · 03/07/2025
#IPCC's 2022 #ClimateReport shows heatwaves in Europe will become more frequent, more intense & will last longer. By 2050, about half of the European population may be exposed to high or very high risk of heat stress during summer. ➡️ bit.ly/IICpt13
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Dr. Aaron Thierry @thierryaaron.bsky.social · 10/06/2025
@ketanjoshi.co provides a very helpful alternative figure as a rejoinder to the primary energy graph in my first post in this thread... bsky.app/profile/keta...
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Dr. Dirk N. Karger @dirknkarger.bsky.social · 05/06/2025
Earlier this year, Chen et al. @science.org showed that droughts are intensifying globally, with warming. www.science.org/doi/full/10.1126/science.ado4245, Now, Gebrechorkos et al. @nature.com confirms the same findings. Very important work, but not wholly novel doi.org/10.1038/s415...
doi.org
Warming accelerates global drought severity - Nature
Increased atmospheric evaporative demand in recent years has increased drought severity by an average of 40% globally across both dry and wet regions, and the trend is likely to continue under future ...
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Valentin Pret @pret-v.bsky.social · 03/06/2025
"These techniques are all however considered more expensive or energy-intensive than cutting emissions in the first place by burning fewer fossil fuels"
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Gatien Falconnier @gatienfalconnier.bsky.social · 23/05/2025
Last week I defended my 'Habilitation à diriger des Recherches' Thanks to those who attended! Thanks to the fantastic jury: L.Alletto A.METAY L.Hossard L.Bell R.Zougmore G.Martin G. Corre-Hellou The slide deck: lnkd.in/g-eJik8P The HDR manuscript: lnkd.in/gF4XcmnU
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Rémi Cardinael @remicardinael.bsky.social · 16/05/2025
Cropping season over in Zimbabwe 🇿🇼 ! After cowpea a few weeks ago, maize 🌽 has now been harvested at our rainfall exclusion site at the University of Zimbabwe @cirad.bsky.social. Yields will for sure be much higher than during the once-in-century El Nino drought last year.
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Heidi Webber @hwebber8.bsky.social · 12/05/2025
So exciting to see our commentary out! With a super team of Yean-Uk Kim of @zalf.bsky.social, @alexruane.bsky.social of @agmip.bsky.social and @robertfinger.bsky.social, we outline needed advances for more robust risk assessments of cropping systems. www.nature.com/articles/s43...
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Valentin Pret @pret-v.bsky.social · 07/05/2025
Great work by PPS colleagues: Intensifying legumes with phosphorus fertiliser and inoculants in smallholder fields increases yields and reduces weed pressure, enabling greater resilience to weeding delays and more flexible farm management shorturl.at/SnHYu
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Gatien Falconnier @gatienfalconnier.bsky.social · 05/05/2025
Low yielding and low data in smallholder farming systems is not a question of fate. I was able to talk on the topic at the last #AgMIP10 conference youtu.be/gAAFJtg2Qb0?...
youtu.be
AgMIP10 April 2 Plenaries (ENG)
YouTube video by AgMIP
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Arthur Charpentier @freakonometrics.bsky.social · 20/04/2025
"Le moins que l’on puisse dire, c’est que la doctrine de l’excellence scientifique ne suit pas une démarche scientifique." www.liberation.fr/debats/2020/...
liberation.fr
L’obscurantisme de l’excellence
La loi sur la recherche risque de favoriser les «meilleurs» laboratoires en créant des grosses structures. Or des études prouvent qu’il est plus efficace de diversifier les financements.
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Rémi Cardinael @remicardinael.bsky.social · 30/04/2025
📢 Great postdoc (3 years) opportunity in our group @cirad.bsky.social in the FairCarboN #ALAMOD project to coordinate a modeling excercice @agmip.bsky.social on #soilorganicmatter and nitrogen dynamics in tropical cropping systems. Deadline: 08/05/25 recrutement.cirad.fr/job/job-rese...
recrutement.cirad.fr
Cirad - Chercheur.e en modélisation de la matière organique dans les systèmes de culture tropicaux
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Lily-belle Sweet @lilybellesweet.bsky.social · 28/04/2025
Transdisciplinary coordination is essential for advancing agricultural modelling with machine learning. The opportunities are great, but to avoid pitfalls, we need to establish benchmarks, evaluation criteria and best practices. Our perspective: www.cell.com/one-earth/fu... @cp-oneearth.bsky.social
cell.com
Transdisciplinary coordination is essential for advancing agricultural modeling with machine learning
Crop models play a key role in understanding and improving the climate-change resilience of food systems. If appropriately used, machine learning can help tackle some of the critical challenges of agr...
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Matthias C. Rillig @mrillig.bsky.social · 25/04/2025
Interesting opinion in Science suggesting to replace 'scientific consensus' with convergent evidence. Because it is less easily derailed by quoting one dissenting opinion. Seems like a good idea! www.science.org/doi/10.1126/...
science.org
Convergence and consensus
In these days of political instability, geopolitical tensions, and social discontent around the world, there are continued threats to the principles, conduct, and findings of science. This assault on ...
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Chloe MacLaren @agent-sprout.bsky.social · 22/04/2025
In a new paper, we propose the 'ecological yield gap' as a framework to strengthen collaboration between agronomists and ecologists in our quest to enhance on-farm ecosystem services in ways that effectively sustain crop yields while minimising input use: doi.org/10.1016/j.gf... 🧪🌱🌾🧑‍🌾🐞💚🤎
sciencedirect.com
Narrowing the ecological yield gap to sustain crop yields with less inputs
Sustainable production of sufficient and healthy food requires efficient use of agricultural inputs. In many regions of the world with intensive agric…
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Rémi Cardinael @remicardinael.bsky.social · 16/04/2025
📢 New #PhD offer. You have a MSc degree in agronomy, soil science or plant ecophysiology AND you are from Kenya? This offer might be for you. "Contribution of #agroforestry systems 🌳 🌽 🥑 🐐 to provisioning ecosystem services, #climatechange adaptation and mitigation in Kenya" Deadline: 31.05.2025.
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Gatien Falconnier @gatienfalconnier.bsky.social · 09/04/2025
Could drought and poor soil undermine the performance of intercropping ? Our study in semi-arid Zimbabwe found that the benefits of intercropping are maintained even with water and N stress. doi.org/10.1016/j.fc... Congrats Illiana Kwenda - A nice combination of field experiments and modelling
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Rémi Cardinael @remicardinael.bsky.social · 08/04/2025
Check out this paper just published by our colleague Antoine Couëdel @cirad.bsky.social in @naturefood.bsky.social Statistical approaches are inadequate for accurate estimation of yield potential and gaps at regional level www.nature.com/articles/s43...
nature.com
Statistical approaches are inadequate for accurate estimation of yield potential and gaps at regional level - Nature Food
Yield potential estimates from statistical models and process-based crop models are compared across diverse climates and soil conditions. The findings reveal limitations of statistical methods, unders...
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CIMMYT @cimmyt.bsky.social · 08/04/2025
🌍 We hosted the 10th #AgMIP Global Workshop at #CIMMYT, where global leaders tackled urgent conversations! From science & policy to crop modeling, we’re advancing #FoodSecurity and a #Sustainable future. 🌱
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Rémi Cardinael @remicardinael.bsky.social · 07/04/2025
Carbon #sequestration in #agroforestry 🌳 🌽 🥑 🐄 is a hot topic. Here we provide #openaccess guidelines to improve the quantification & reporting of carbon stocks in #soils & #biomass & additional #carbon storage in agroforestry systems, and to maximize manuscript acceptance. doi.org/10.1007/s104...
doi.org
Guidelines for improved quantification and reporting of carbon stocks and additional carbon storage in agroforestry systems - Agroforestry Systems
The number of scientific publications related to biomass carbon or soil organic carbon under various land management practices has globally and dramatically increased during the last two decades, the ...
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Louise Leroux @lerouxlouise.bsky.social · 03/04/2025
Interested in participatory approaches and spatial modelling applied to smallholder farming system? ➡️ we have a PhD opportunity in the #GALILEO project on #agroforestery for #climatechange resilience! 🌍🧑‍🌾🌳🌽 📅Deadline : 11 May 2025 📝Modalities : gaia.umontpellier.fr/documents/SU...
gaia.umontpellier.fr
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Agricultural Model Intercomparison and Improvement Project @agmip.bsky.social · 01/04/2025
#AgMIP10 officially launched this morning, but we hosted seven pre-workshop Side Meetings yesterday, including the GGCMI, Wheat, Ozone, Global Econ, Low-Input, and Calibration #AgMIPTeams.
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Gatien Falconnier @gatienfalconnier.bsky.social · 04/04/2025
#Agmip10 Understanding of nutrient soil supply is key to design relevant srategies for fertility management in smallholder system We are kick-starting a new Agmip intercomparison to asses how well models deal with soil organic matter mineralisation
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Rémi Cardinael @remicardinael.bsky.social · 07/04/2025
#JustOut #openaccess Combining two years of on-farm experiments & modeling with the STICS soil-crop model, we showed that land productivity benefits of maize-cowpea #intercropping can be maintained in conditions of high water and nitrogen stress @gatienfalconnier.bsky.social doi.org/10.1016/j.fc...
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Rémi Cardinael @remicardinael.bsky.social · 20/03/2025
A few aerial pictures from some of our on-farm experiments and demo plots in Murehwa & Mutoko districts, 🇿🇼. Beautiful landscape as always in 🇿🇼 🤩! #intercropping #mulch #manure #fertilizers #RAIZ_project @cirad.bsky.social @cimmyt.bsky.social @gatienfalconnier.bsky.social @kelvinchipoyi.bsky.social
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Rémi Cardinael @remicardinael.bsky.social · 12/03/2025
A great group !!
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Rémi Cardinael @remicardinael.bsky.social · 12/03/2025
📢 You are from Sub-Saharan Africa, have a MSc in biological science? Here is a PhD offer in 🇰🇪 w\ ICIPE, Univ Embu, CIRAD: "Evaluation of impact of #agroforestry 🌳🌽 & conventional farming systems on belowground #biodiversity 🐜🪱 & regulating services" 📅 19 Mar 2025 scholarships.icipe.org/calls/51
scholarships.icipe.org
ICIPE Scholarships portal
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Peter Gleick @petergleick.bsky.social · 10/03/2025
The Trump Administration is eliminating the Office of the Chief Scientist at NASA. The current head of that office is Dr. Katherine Calvin, an expert on climate change, global modeling, and international scientific negotiations. www.science.org/content/arti...
science.org
NASA to eliminate chief scientist position
Long-running advisory role cut along with two dozen others in agencywide reduction
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Rémi Cardinael @remicardinael.bsky.social · 10/03/2025
Visit of our Cirad-University of Zimbabwe rainfall exclusion experiment with the French Ambassador and the RAIZ project steering committee, followed by field days in Murewa and Mutoko 🇿🇼 gathering hundreds of farmers #agroecology #climatechange #climatesmartagriculture #intercropping #legumes
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Valentin Pret @pret-v.bsky.social · 27/02/2025
A must-read !
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Rémi Cardinael @remicardinael.bsky.social · 23/02/2025
#JustOut #openaccess 2nd PhD paper of R. Nyawasha 👏 ! A nice study about SOC stocks in a smallholder communal area of 🇿🇼 and how they are impacted by land use, soil type & historical management. Also includes a comparison w\ predicted SOC stocks from AfSIS @cirad.bsky.social doi.org/10.1016/j.ca...
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Dezene Huber 🍁 🌻 @dezene.me · 18/02/2025
The environmental cost of war is part of the human cost of war. 🇵🇸 🌍 e360.yale.edu/features/gaz...
Figure from the linked article, with heading: "Vegetation in Gaza in June 2021 and June 2024. FORENSIC ARCHITECTURE"

The 2024 map shows substantially reduced vegetation cover across Gaza compared to 2021.
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Kai Sonder @kaisonder.bsky.social · 16/02/2025
Mapped: How extreme weather is destroying crops around the world lnkd.in/eR_cfand
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Michael Grunwald @mikegrunwald.bsky.social · 12/02/2025
Drop everything and read this brilliant @charlescmann.bsky.social essay on how modern agriculture feeds the world. Fertilizer, irrigation, and genetics! www.thenewatlantis.com/publications...
thenewatlantis.com
We Live Like Royalty and Don’t Know It
Introducing “How the System Works,” a series on the hidden mechanisms that support modern life
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Emanuele Bevacqua @bevacquae.bsky.social · 10/02/2025
In Nature Climate Change, we show that a year above 1.5 °C signals that Earth is most probably within the 20-year period that will reach the Paris Agreement limit. @natclimchange.bsky.social
nature.com
A year above 1.5 °C signals that Earth is most probably within the 20-year period that will reach the Paris Agreement limit - Nature Climate Change
What a first year with temperature 1.5 °C above the pre-industrial baseline implies for long-term temperature goals is unclear. Here the authors show that such a first year above the baseline is highl...
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Valentin Pret @pret-v.bsky.social · 10/02/2025
🚨 #JustPublished "Farm resilience to climatic risk. A review" with @cirad.bsky.social and @w-u-r.bsky.social More comprehensive assessments are needed to measure farm #resilience, especially for #smallholders. For this, we are proposing 6 guidelines #OpenAccess 👉 t.co/djDpVPtbsC
@falcommer
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Andrew McGuire @agronomistag.bsky.social · 02/02/2025
Cropped fields aren’t degraded nature—they’re designed to feed us, which requires trade-offs. Using natural ecosystems as a benchmark for soil health or regenerative ag is misleading. My latest shows why: csanr.wsu.edu/soil-organic...
csanr.wsu.edu
Soil Organic Matter in Natural Ecosystems vs. Cropped Fields: A Misleading Comparison
As described in a previous post, the energy flows of cropped fields and natural ecosystems differ greatly. In natural systems, most of the solar energy captured by plants stays within the ecosystem, c...
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Chloe MacLaren @agent-sprout.bsky.social · 30/01/2025
Postdoc opportunity for someone with good data wrangling and analysis skills to explore the effects of agroecological farming practices using long-term experiment datasets 🌾🌻🌦️🌐📈🤎💚🧪 At SLU in Uppsala, Sweden, with Riccardo Bommarco, Giulia Vico, and me: www.slu.se/en/about-slu...
slu.se
Jobs and vacancies at SLU. | slu.se
Jobs and vacancies at SLU. Read more about each job by clicking the job title. Please, follow the instructions closely when applying.
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