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Registros recuperados: 10
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Nitrogen management of organic winter wheat Decision-making through model-based explorations Organic Eprints
David, C.; Jeuffroy, M.H.; Meynard, J.M..
In organic wheat, nitrogen is one of the key limiting factors responsible for irregular productivity and low quality (David et al, 2005b), 5 to 50 % less than conventionally managed crops (Nieberg and Schulze Pals, 1996). On arable farms, the decreasing use of N-organic sources such as forage legumes, manures and composts relative to mixed-farms requires the development of suitable fertility strategies based on the use of off-farm organic fertilizers. Numerous mechanistic crop models simulating the dynamics of crop requirements and N supply in the soil (e.g. CERES, EPIC, APSIM, ARCWHEAT STICS) have previously been developed (Whisler et al, 1996). Although these models are highly used in research, their complexity and input requirements have limited their...
Tipo: Conference paper, poster, etc. Palavras-chave: Nutrient turnover Cereals; Pulses and oilseeds.
Ano: 2005 URL: http://orgprints.org/4215/4/4215%2DDavid_etal_4p_revised%2Ded.pdf
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Logiques et modes de coordination d’entreprises, perspectives d’évolution d’un marché en développement : le cas du secteur céréalier en agriculture biologique dans deux régions Pays de La Loire et Rhône Alpes Organic Eprints
Sylvander, Bertil; Schieb-Bienfait, Nathalie; Roque, Olivier; Neyrat, S.; David, C..
La remise en cause du modèle fordiste de l’agriculture européenne, fondée sur une contestation sociale de ses excès et de ses dérives, a conduit au cours des années 1980-90 à une légitimation d’alternatives, qui étaient souvent apparues au cours des décennies précédentes. Une convention sociale s’est progressivement développée autour de la prise en compte des problèmes sociétaux liés à ce modèle de développement : dégradation du goût des produits, présence de résidus de pesticides et de nitrates dans les sols, les eaux et l'alimentation, atteintes au bien être animal, dégradation des paysages, inquiétude sur la biodiversité et le réchauffement de la planète, etc…Bref, les analyses et les valeurs du courant écologiste, longtemps confinés à une petite...
Tipo: Conference paper, poster, etc. Palavras-chave: Social aspects; Farm economics.
Ano: 2005 URL: http://orgprints.org/6720/1/communication_PSDR_Bio_%2D_PDLL_%2D_RA_%2D_version_FINALE%2D_6oct05.pdf
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Adapting precision farming principles to organic crop production Organic Eprints
David, C..
Precision farming is a discipline that aims to increase efficiency in the management of agriculture throughout new technologies. Organic crop production systems in the future need to combine satisfactory productivity with long term sustainability. The aim of this paper is to present potentials and limits using precision farming priciples in organic crop production
Tipo: Conference paper, poster, etc. Palavras-chave: Production systems.
Ano: 2006 URL: http://orgprints.org/9057/1/9057.pdf
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AGTEC-Org Organic Eprints
David, C..
Agronomical and technological methods to improve organic wheat quality.
Tipo: Conference paper, poster, etc. Palavras-chave: "Organics" in general.
Ano: 2011 URL: http://orgprints.org/20098/1/COI_AGTEC_ORG_Christophe_David.pdf
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Techniques to improve technological and sanitary quality Organic Eprints
David, C.; Celette, F.; Abecassis, J.; Carcea, M.; Dubois, D.; Friedel, J.K.; Hellou, G.; Jeuffroy, M.-H.; Mäder, P.; Thomsen, I. K..
Agronomical ways for better quality and safety Choice of cultivar is an efficient way to obtain higher grain quality. Intercropping legumes (grain or forage) improves weed competition and N availability for wheat crop or succeeding crop. Green manure can be an effective alternative to farmyard manure. Fertilization with readily available nitrogen improves yield and quality when water is available. Reduced tillage affects soil fertility and wheat yield but has little effects on grain quality. Technological ways for better quality and safety Milling process strongly influences flour characteristics. Stone milling improves nutritive value; characteristics remain very stable independent of the milling yield. Flour characteristics from roller milling...
Tipo: Report Palavras-chave: Food security; Food quality and human health Cereals; Pulses and oilseeds.
Ano: 2012 URL: http://orgprints.org/20851/1/AGTEC_general_leaflet__FVMarch12.pdf
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Techniques to improve technological and sanitary quality Organic Eprints
David, C.; Celette, F.; Abecassis, J.; Carcea, M.; Dubois, D.; Friedel, J. K.; Hellou, G.; Jeuffroy, M.-H.; Mäder, P.; Thomsen, I. K..
The demand for high quality organic bread cereals is increasing. In spite of variable grain protein contents, baking quality of organic wheat was found to be acceptable to good. Mycotoxin (DON) contents were generally low on tested grain samples. Choice of the wheat cultivar is the most efficient way to obtain higher grain quality. Fertilization with readily available nitrogen and, to a lower extent, association with legumes and green manuring with mixtures containing fodder legumes can also improve grain quality. Reduced tillage affects soil quality and wheat yield but has little effects on grain quality.
Tipo: Report Palavras-chave: Cereals; Pulses and oilseeds.
Ano: 2012 URL: http://orgprints.org/20850/1/AGTEC_farmers_leaflet_v3March12.pdf
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Organic Bread Wheat Production and Market in Europe Organic Eprints
David, C.; Abecassis, J.; Carcea, M.; Celette, F.; Friedel, J.K.; Hellou, G.; Hiltbrunner, J.; Messmer, M.; Narducci, V.; Peigné, J.; Samson, M.-F.; Schweinzer, A.; Thomsen, I.K.; Thommen, A..
This chapter is a first attempt to analyse bottlenecks and challenges of European organic bread wheat sector involving technical, political and market issues. From 2000, the organic grain market has largely increased in Western Europe. To balance higher consumer demand there is a need to increase organic production by a new transition and technical improvement. Bread wheat is grown in a variety of crop rotations and farming systems where four basic organic crop production systems have been defined. Weeds and nitrogen deficiency are considered to be the most serious threat inducing lowest grain yield under organic production. The choice of cultivar, green manure, fertilization and intercropping legumes – grain or forage – are efficient ways to obtain high...
Tipo: Book chapter Palavras-chave: Cereals; Pulses and oilseeds Crop husbandry Markets and trade.
Ano: 2012 URL: http://orgprints.org/26365/1/David_etal_2013_SAR.pdf
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Agronomical techniques to improve technological and sanitary quality Organic Eprints
David, C.; Celette, F.; Abecassis, J.; Carcea, M.; Dubois, D.; Friedel, J.K.; Hellou, G.; Jeuffroy, M.H.; Mäder, P.; Thomsen, I.K..
In spite of variable grain protein contents, baking quality of organic wheat was found to be acceptable to good. Mycotoxin (DON) infestation was generally low on tested grain samples. Choice of wheat cultivar was the most efficient way to obtain higher grain quality. Fertilization with readily available nitrogen and, to a lower extent, association with legumes and green manures with mixtures containing fodder legumes also improved grain quality. Reduced tillage affected soil quality and wheat yield but had little effects on grain quality.
Tipo: Report Palavras-chave: Food security; Food quality and human health Cereals; Pulses and oilseeds.
Ano: 2012 URL: http://orgprints.org/21100/1/AGTEC_farmers_leaflet_Final_VJune12.pdf
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Technological quality of organic wheat in Europe Organic Eprints
David, C.; Celette, F.; Abecassis, J.; Carcea, M.; Dubois, D.; Friedel, J. K.; Hellou, G.; Jeuffroy, M.-H.; Mäder, P.; Thomsen, I. K..
The demand for high quality organic bread wheat is increasing. The quality level of organic wheat harvested in EU is mainly dependant on variety, environmental conditions and agronomic practices. In some countries, protein content and composition, influencing technological value, are equivalent to those produced under conventional practices. Beside agronomical techniques, technological processes can help to maintain a good quality. Pre-treatments before milling such as debranning were found to be efficient in reducing DON contamination. The project highlighted the necessity to redefine the methods to assess the quality of organic wheat.
Tipo: Report Palavras-chave: Food security; Food quality and human health Cereals; Pulses and oilseeds.
Ano: 2012 URL: http://orgprints.org/20852/1/AGTEC_technological_leaflet_April_12FV.pdf
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Wheat yield and quality as influenced by reduced tillage in organic farming Organic Eprints
Peigné, J.; Messmer, M.; Aveline, A.; Berner, A.; Mäder, P.; Carcea, M.; Narducci, V.; Samson, M.-F.; Thomsen, I.K.; Celette, F.; David, C..
Organic farmers are interested in soil conservation by reduced tillage, techniques well known in conventional agriculture to protect soil quality and limit labor time and energy costs. However, organic farming and reduced tillage can modify weeds, soil structure, and thus soil nitrogen (N) mineralization which strongly influences wheat yield and quality. The main objectives of this study were to analyze how reduced tillage applied to organic wheat influenced (1) grain yield, protein concentration, and weed infestation; (2) deoxynivalenol (DON) contamination on grain; (3) technological quality parameters such as dry gluten, zeleny index, falling number, and gluten index; (4) protein composition (F1, F2, F3, F4, and F5 fractions, and UPP, gliadin/glutenin...
Tipo: Journal paper Palavras-chave: Cereals; Pulses and oilseeds Soil tillage.
Ano: 2014 URL: http://orgprints.org/26366/1/Peign%C3%A9_etal_2013_OA.pdf
Registros recuperados: 10
Primeira ... 1 ... Última
 

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