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| Registros recuperados: 24 | |
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| Abecassis, Joël; David, Christophe; Fontaine, Laurence; Taupier-Létage, Bruno; Viaux, P.. |
| The main challenge for organic farmers, millers and bakers is to fulfill consumers’ expectations of providing healthy and safe products. The quality of organic grain can be modulated by agronomic modifications on genotypes, crop management, crop rotation and soil fertility, but the milling process and finally the baking process are also key factors in producing bread of high baking quality, nutritional value, taste and flavour. Nitrogen (N) is a key nutrient in achieving acceptable yield levels of sufficient bread-making quality, but previous results have shown that organic wheat tends to have lower protein content, dough mixing tolerance and loaf volume. The selection of genotypes with high N use efficiency, weed competitiveness and disease resistance... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food systems. |
| Ano: 2008 |
URL: http://orgprints.org/12529/1/12529.pdf |
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| David, Christophe; Jeuffroy, Marie-Hélène. |
| Advances in scientific understanding of the plant and soil behaviour in a cultivated field led to the design of numerous soil-crop models simulating crop growth. The frequent low predictive quality of these models is linked to uncertainties in inputs, parameters and equations. The AZODYN crop model predicting wheat grain yield and grain protein content was previously developed to support decision for N management of conventional and organic wheat crops. This paper outlines a sequential approach to improve the predictions of the AZODYN model by testing various formalisms. This study is based on the comparison of 38 versions of the model assessed in multi-environment trials carried out under conventional or low-input conditions. This paper describes and... |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Composting and manuring Nutrient turnover. |
| Ano: 2009 |
URL: http://orgprints.org/19494/1/David_et_Jeuffroy%2C_2009.pdf |
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| Casagrande, Marion; David, Christophe; Etienne, Catherine; Makowski, David; Valantin-Morison, Muriel; Jeuffroy, Marie-Hélène. |
| A regional agronomic diagnosis was implemented to identify factors responsible for low values of Grain Protein Content (GPC) in a network of 35 organic winter wheat fields in South-Eastern France. The influence of water nutrition, radiation and temperature, weed density at flowering, nitrogen (N) status of crop at flowering and variety type were studied. Two statistical methods were used successively: classical linear regression and a mixing model approach based on a weighted sum of all possible linear combinations of explanatory variables. GPC was significantly related to variety type, crop N status and weed density. An analysis of variance showed that weed density was related to soil type and nitrogen supply. |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2008 |
URL: http://orgprints.org/11825/1/Casagrande_11825_ed.doc |
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| Celette, Florian; Peigne, Joséphine; Thomsen, Ingrid Kaag; Carcea, Marina; Aveline, Anne; Hellou, Guénaëlle; Mäder, Paul; Hiltbrunner, Jürg; Mayer, Jochen; Dubois, David; Thommen, Andreas; Schweinzer, Agnes; Friedel, Juergen K.; David, Christophe. |
| A common handbook was conceived in the CORE Organic AGTEC-Org project in order to give some elements of field trial monitoring. |
| Tipo: Working paper |
Palavras-chave: Crop combinations and interactions Composting and manuring Soil tillage Soil Crop health; Quality; Protection Weed management. |
| Ano: 2008 |
URL: http://orgprints.org/16461/1/AGTEC_Agronomy_Handbook_of_Methods.pdf |
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| Celette, Florian; Goulevant, Gael; Amosse, Camille; David, Christophe. |
| One of the key issues of organic arable systems is to increase use of N2 fixation from legume plants while enhancing autonomy by the limitation of off-farm inputs. Wheat yield in organic agriculture is generally low and variable. Grain yield and protein content are strongly affected by N deficiency and weed competition (Casagrande et al., 2009). Previous research had clearly demonstrated the benefits of forage legumes to improve N balance and preserve weed infestation (den Hollander et al., 2007). Several authors highlighted the interest of crop mixtures combining cereal and legumes to provide higher overall productivity, enhance ecological services and improve economical profitability (Malezieux et al., 2008). Nevertheless, previous research also... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Crop combinations and interactions Cereals; Pulses and oilseeds Farm nutrient management. |
| Ano: 2010 |
URL: http://orgprints.org/18891/1/Celette_2011_18891_conference_paper.pdf |
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| Peigne, Joséphine; Casagrande, Marion; David, Christophe; Sans, Francesc Xavier; Blanco-Moreno, José Manuel; Cooper, Julia; Gascoyne, Kate; Antichi, Daniele; Bàrberi, Paolo; Bigongiali, Federica; Surböck, Andreas; Kranzler, Andreas; Beeckman, Annelies; Willekens, Koen; Luik, Anne; Matt, Darja; Grosse, Meike; Heß, Jürgen; Clerc, Maurice; Dierauer, Hansueli; Mäder, Paul. |
| The interest of organic farmers for adopting conservation agriculture practices is currently growing. But, there are few technical and scientific references available for organic farmers when they start applying conservation agriculture practices. The main objectives of this study are (1) to explore the diversity of crop management practices using conservation agriculture methods among European farmers, and (2) to identify main farmers’ strategies. We carried out a survey of 159 farmers located in 10 European countries with a questionnaire with closed-ended questions. Data were analysis with a multi factor analysis followed by clustering to identify groups of farmers that share the same type of spring and winter crop managements. Organic farmers in Europe,... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Surveys and statistics; Crop combinations and interactions; Soil tillage; Weed management. |
| Ano: 2014 |
URL: http://orgprints.org/23910/1/23910_revised%20version_MM.pdf |
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| Hallier, Arnaud; Celette, Florian; David, Christophe. |
| Deoxynivalenol was extracted from wheat grain and quantified by GC-ECD. The quantification of deoxynivalenol can be critical, for example in certifying the amount of the mycotoxin in a lot and determining if this amount is over or under a fixed limit. Thus, an objective was to obtain representative samples to monitor DON quantification variability. We show that among the different steps of analysis the critical one is grain sampling. We also show that we were able to significantly improve the extraction rate without increasing the variability by using a longer extraction time with a magnetic agitator, and a grinding process which takes into account both the heterogeneous repartition of deoxynivalenol within wheat grains and different extraction rates... |
| Tipo: Journal paper |
Palavras-chave: Food security; Food quality and human health Produce chain management. |
| Ano: 2011 |
URL: http://orgprints.org/18893/2/Hallier_et_al.pdf |
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| Peigne, Joséphine; Casagrande, Marion; Payet, Vincent; David, Christophe; Sans, F. Xavier; Blanco-Moreno, José M.; Cooper, Julia; Gascoyne, Kate; Antichi, Daniele; Bàrberi, Paolo; Bigongiali, Federica; Surböck, Andreas; Kranzler, Andreas; Beechman, Annelies; Willekens, Koen; Luik, Anne; Matt, Darja; Grosse, Meike; Heß, Jürgen; Clerc, Maurice; Dierauer, Hansueli; Mäder, Paul. |
| The interest of organic farmers in adopting conservation agriculture principles, including minimal soil disturbance, permanent soil cover and crop rotation has been growing since the early 2000s. However, currently there is no network for organic farmers practicing conservation agriculture, and a lack of knowledge on how organic farmers implement conservation agriculture in practice. Consequently, few technical references are available for organic farmers when they start applying conservation agriculture practices, in particular on controlling weeds without the use of herbicides. The main objectives of this study were: (1) to explore the diversity of conservation agriculture techniques (i.e., reduced tillage, no-tillage and green manures) practiced among... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Soil quality; Environmental aspects; Europe. |
| Ano: 2016 |
URL: http://orgprints.org/31244/1/peigne-etal-2015-Howorganicfarmerspractice-RAaFS-31-1-p72-85.pdf |
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| David, Christophe; Abecassis, Joël; Carcea, M.; Celette, Florian; Corre-Hellou, Guénaëlle; Friedel, J.; Hiltbrunner, J.; Mäder, Paul; Messmer, Monika; Narducci, V.; Peigne, Joséphine; Thomsen, I. K.. |
| The organic bread wheat market has been diversified over time through the emergence of different sale channels. Processors require organic bread wheat of higher quality and safety in order to meet the consumers’ demand. The overall objective of the AGTEC-Org project was to identify agronomical and technological ways to improve the performance of organic wheat and flour. The findings would contribute to enhanced baking quality and nutritional value of organic flour, as well as prevention of mycotoxin contamination. The project involved 9 research centers or universities from 5 European countries for a total budget of about 1.5 million €. More than 400 experimental treatments were analyzed from 23 agronomic trials and 4 lab-experiments on food technology.... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions Food security; Food quality and human health Composting and manuring Processing; Packaging and transportation. |
| Ano: 2013 |
URL: http://orgprints.org/26013/1/David_2013_CIAG_Vol32.pdf |
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| Casagrande, Marion; David, Christophe; Valantin-Morison, Muriel; Jeuffroy, Marie-Hélène. |
| French organic farmers are asked to increase Grain Protein Content (GPC) of organic winter wheat to guarantee the breadmaking quality required from millers. Facing with the recent depletion of organic products, farmers also need to stabilize and increase the yield performance. The aim of our study is to give the explanations of the yield and GPC variability generally observed in organic production. A diagnostic method will be implemented on a network of ca. 10 fields per year during two crop years added with previous field network (77 fields) and experi-ments (4 experiments on cultivars). We will under-stand yield and GPC performance from environmental and agronomic conditions and relate the observed limiting factors with crop management, climatic... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Cereals; Pulses and oilseeds. |
| Ano: 2006 |
URL: http://orgprints.org/7358/1/ShortpaperMarionCasagrande.rtf |
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| David, Christophe; Celette, Florian; Abecassis, Joël; Carcea, Marina; Friedel, Jürgen K.; Corre-Hellou, Guénaëlle; Hiltbrunner, Jürg; Messmer, Monika; Peigne, Joséphine; Samson, Marie-Françoise; Schweinzer, Agnes; Thomsen, I.K.; Thommen, Andreas. |
| The total organic area in the EU-27 had an annual average growth rate of nearly 15% from 1998 to 2006 with winter wheat being the most important cereal crop. Wheat yield in organic farming is around 30% to 70% of yield of conventional farming but higher premia for organic wheat may to some extent compensate for this. Bread wheat is grown in a variety of crop rotations and farming systems and four basic organic crop production systems have been defined. Nitrogen deficiency and weed infestation are considered to be the most serious threat in organic wheat production. Organic wheat producers will have to fulfil the technological needs of bakers although the requirements differ widely from small artisan bakers to large enterprises handling the organic bread... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Food security; Food quality and human health Cereals; Pulses and oilseeds. |
| Ano: 2011 |
URL: http://orgprints.org/19483/1/OWBread_ISOFAR2011_David_et_al2011.pdf |
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| Casagrande, Marion; Peigne, Joséphine; David, Christophe; Sans, Francesc Xavier; Blanco-Moreno, José Manuel; Cooper, Julia; Gascoyne, Kate; Antichi, Daniele; Bàrberi, Paolo; Bigongiali, Federica; Surböck, Andreas; Kranzler, Andreas; Beeckman, Annelies; Willekens, Koen; Luik, Anne; Peetsmann, Elen; Grosse, Meike; Heß, Jürgen; Clerc, Maurice; Dierauer, Hansueli; Mäder, Paul. |
| As conservation agriculture and organic farming are currently considered as environmentally friendly options for producing food, this study explores the motivations and problems of organic European farmers that apply at least two of the following techniques: (i) no-tillage, (ii) reduced tillage and/or (iii) green manures conservation practices. We carried out a survey about motivations and problems of 159 farmers located in 10 European countries with a questionnaire with closed-ended questions. Data were analysis with a principal component analysis followed by clustering to identify groups of farmers that share the same type of motivations and problems. The most important motivations are related to soil preservation concerns and problems are mainly linked... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Surveys and statistics; Social aspects; Soil tillage; Weed management. |
| Ano: 2014 |
URL: http://orgprints.org/23939/1/23939_revised%20version_MM.pdf |
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| Casagrande, Marion; Peigne, Joséphine; Payet, Vincent; Mäder, Paul; Sans, F. Xavier; Blanco-Moreno, José Manuel; Antichi, Daniele; Barberi, Paolo; Beeckmann, Annelies; Bigongiali, Federica; Cooper, Julia; Dierauer, Hansueli; Gascoyne, Kate; Grosse, Meike; Heß, Jürgen; Kranzler, Andreas; Luik, Anne; Peetsmann, Elen; Surböck, Andreas; Willekens, Koen; David, Christophe. |
| Conservation agriculture and organic farming are considered as promising sustainable agricultural system for producing food, while minimizing environmental impacts. Despite an increasing number of experimental data on organic conservation practices and various studies dealing with the adoption of conservation agriculture by farmers, none of those studies have specifically addressed conservation agriculture adoption under organic conditions in Europe. We carried out a survey with 159 farmers located in 10 European countries. These farmers had applied at least two of the following conservation practices: (i) no-tillage, (ii) reduced tillage and (iii) green manures. Each farmer assessed socio-economic, agronomic and environmental motivations and problems for... |
| Tipo: Journal paper |
Palavras-chave: "Organics" in general; Soil tillage; Environmental aspects. |
| Ano: 2015 |
URL: http://orgprints.org/29478/1/casagrande-etal-2015-OrganicAgriculture-p1-15-OrgFarmersMotivations.pdf |
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| Cooper, Julia; Baranski, Marcin; Stewart, Gavin; Nobel-de Lange, Majimcha; Barberi, Paolo; Fliessbach, Andreas; Peigne, Joséphine; Berner, Alfred; Brock, Christopher; Casagrande, Marion; Crowley, Oliver; David, Christophe; De Vliegher, Alex; Döring, Thomas F.; Dupont, Aurélien; Entz, Martin; Grosse, Meike; Haase, Thorsten; Halde, Caroline; Hammerl, Verena; Huiting, Hilfred; Leithold, Günter; Messmer, Monika; Schloter, Michael; Sukkel, Wijnand; van der Heijden, Marcel G. A.; Willekens, Koen; Wittwer, Raphaël; Mäder, Paul. |
| Reduced tillage is increasingly promoted to improve sustainability and productivity of agricultural systems. Nonetheless, adoption of reduced tillage by organic farmers has been slow due to concerns about nutrient supply, soil structure, and weeds that may limit yields. Here, we compiled the results from both published and unpublished research comparing deep or shallow inversion tillage, with various categories of reduced tillage under organic management. Shallow refers to less than 25 cm. We found that (1) division of reduced tillage practices into different classes with varying degrees of intensity allowed us to assess the trade-offs between reductions in tillage intensity, crop yields, weed incidence, and soil C stocks. (2) Reducing tillage intensity in... |
| Tipo: Journal paper |
Palavras-chave: Soil quality; Soil tillage. |
| Ano: 2016 |
URL: http://orgprints.org/29974/1/Cooper-etal-2016-ASD-36_22.pdf |
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| Registros recuperados: 24 | |
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