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| Registros recuperados: 4.506 | |
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| Fornazier, Armando; Pedrozo, Eugenio Avila. |
| A produção de produtos denominados orgânicos ou ecológicos tem sido uma realidade, porém, no processo de comercialização muitas vezes não se consegue caracterizar todos os atributos do produto. O objetivo deste trabalho foi de avaliar a percepção dos agentes envolvidos na produção e comercialização de produtos oriundos da agricultura ecológica comercializados numa feira de produtos ecológicos de Porto Alegre, estado do Rio Grande do Sul, avaliando o processo através de alguns aspectos da Economia dos Custos de Transação (ECT). Dessa forma, busca-se descrever como a confiança entre os membros permite o desenvolvimento de uma relação de afirmação na garantia de uma dada característica do produto. O estudo do caso mostrou ter relações de confiança entre os... |
| Tipo: Journal paper |
Palavras-chave: Farm economics; Farming Systems; Social aspects. |
| Ano: 2010 |
URL: http://orgprints.org/25013/1/Fornazier_Confian%C3%A7a.pdf |
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| Borsatto, Ricardo Serra; Carmo, Maristela Simões do. |
| Na última década, o Movimento dos Trabalhadores Rurais Sem-Terra (MST), que luta pela reforma agrária no Brasil, vem mudando de forma radical o seu discurso para uma proposta mais coerente com as diretrizes preconizadas pela agroecologia. Neste contexto, o intuito do presente trabalho foi o de compreender, a partir de uma abordagem teórico-histórica, a apropriação do conceito agroecologia como bandeira na luta pela reforma agrária defendida pelo MST. Para tanto, partiu-se de revisões sobre as concepções clássicas relativas ao papel do campesinato nas sociedades contemporâneas e buscou-se realizar "pontes teóricas" com os discursos e as ações praticadas pelo MST em sua história, baseando-se em análise documental. Por fim, este artigo conclui que a defesa da... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Farming Systems. |
| Ano: 2013 |
URL: http://orgprints.org/28508/1/Borsatto_a%20constru%C3%A7%C3%A3o.pdf |
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| Campos, Jurema Iara; Valente, Ana Lúcia Eduardo Farah. |
| Este estudo apresenta os principais resultados da análise de como habitantes de Alto Paraíso de Goiás estão buscando alternativas para o desenvolvimento sustentável do município, por meio da implantação, pela Embrapa, de projeto relativo ao resgate do café. A mineração e as atividades agropecuárias foram exercidas na região até os anos 60, quando a atividade principal passou a ser o turismo, a partir da criação do Parque Nacional da Chapada dos Veadeiros e da inauguração de Brasília. Em 2000, o fluxo de turistas decaiu devido a problemas relativos à saúde pública, acarretando estagnação da economia local. Nos últimos anos, produtores familiares despertaram para a existência, ali, de um café que pode ser comercializado em nichos de mercado de grãos... |
| Tipo: Journal paper |
Palavras-chave: Production systems; Markets and trade. |
| Ano: 2010 |
URL: http://orgprints.org/22600/1/Campos_Constru%C3%A7%C3%A3o.pdf |
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| Esperschütz, J.; Gattinger, A.; Buegger, F.; Lang, H.; Munch, J.; Schloter, M.; Winkler, J.. |
| A continuous labelling experiment using 13C-CO2 was set up in open-top chambers in order to follow fluxes of assimilates from the plant into the rhizosphere. Labelling was performed for one growing season by adding low amounts of CO2 depleted in 13C to the atmosphere of the open-top chambers, resulting in a difference of ∆ 13C 5‰ V-PDB compared to ambient conditions. The label was recovered in both plant parts and soil microbial communities, analysed via phospholipid fatty acid (PLFA) side chains. PLFA 18:2ω6,9 showed a significant incorporation of the 13C label in October, indicating that fungi utilized plant derived carbon. In bacterial PLFA no label incorporation was detected, probably due to a lower use of rhizodeposits or a preference to older carbon... |
| Tipo: Journal paper |
Palavras-chave: Soil. |
| Ano: 2009 |
URL: http://orgprints.org/26374/1/Esperschuetz_etal_2009_PS323.pdf |
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| Hilbeck, Angelika; Mc Millan, Johanna M.; Meier, Matthias; Humbel, Anna; Schläpfer-Miller, Juanita; Trtikova, Miluse. |
| Background: In 2008/2009, Schmidt and colleagues published a study reporting lethal effects of the microbial Bt toxins Cry1Ab and Cry3Bb on the coccinellid biological control organisms Adalia bipunctata. Based on this study, in concert with over 30 other publications, Mon810 cultivation was banned in Germany in 2009. This triggered two commentaries and one experimental study all published in the journal ‘Transgenic Research’ that question the scientific basis of the German ban or claim to disprove the adverse effects of the Bt toxins on A. bipunctata reported by Schmidt and colleagues, respectively. This study was undertaken to investigate the underlying reasons for the different outcomes and rebuts the criticism voiced by the two other commentaries.... |
| Tipo: Journal paper |
Palavras-chave: Research methodology and philosophy; Environmental aspects. |
| Ano: 2012 |
URL: http://orgprints.org/23046/1/Hilbeck-etal-2012-EnvironSciEu-24-10-p1-12.pdf |
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| Riar, Amritbir; Mandloi, Lokendra S.; Poswal, Randhir S.; Messmer, Monika M.; Bhullar, Gurbir S.. |
| Organic agriculture is one of the most widely known alternative production systems advocated for its benefits to soil, environment, health and economic well-being of farming communities. Rapid increase in the market demand for organic products presents a remarkable opportunity for expansion of organic agriculture. A thorough understanding of the context specific motivations of farmers for adoption of organic farming systems is important so that appropriate policy measures are put in place. With an aim of understanding the social and biophysical motivations of organic and conventional cotton farmers for following their respective farming practices, a detailed farm survey was conducted in Nimar valley of Madhya Pradesh state in central India. The study area... |
| Tipo: Journal paper |
Palavras-chave: Crop husbandry; India. |
| Ano: 2017 |
URL: http://orgprints.org/31989/1/riar-etal-2017-fpls-Vol08-p01289.pdf |
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| Jamar, Laurent; Lefrancq, Bruno; Fassotte, Christianne; Lateur, Marc. |
| In a field experiment conducted over two growing seasons, the effectiveness and phytotoxicity of inorganic fungicides such as sulphur, lime sulphur, copper, silicon and Armicarb (a new formulation of potassium bicarbonate) was compared with water for the control of primary apple scab infections in Belgium on high, medium and low scab-susceptible cultivars (cvs. ‘Pinova’, ‘Pirouette’ and ‘Reinette des Capucins’, respectively). In order to drastically reduce the amount of fungicide applied in the orchard, two approaches were used: (i) a strategy involving spraying during the infection process, just before conditions for infection had been fulfilled according to the RIMpro software warning system; and (ii) a tunnel sprayer machine for treatment applications.... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection. |
| Ano: 2008 |
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| Petersen, B.M.; Olesen, J.E.; Heidmann, T.. |
| Existing models of soil organic matter (SOM) turnover are implemented within rigid and often complex modelling environments, which makes the testing of influence of SOM model structure a rather difficult task. A new soil carbon turnover simulation tool is presented (C-TOOL v. 1.0). It facilitates the construction of a wide range of user-definable SOM models based on linked SOM pools and a decay described for each pool by first order kinetics. Simulation of carbon isotopes 13C and 14C is facilitated. No programming is necessary for defining or redefining models, as the model structure is given in set-up files. The program is fast, and can utilise a range of time-steps, which enhances the computation of steady level SOM contents. The ability of C-TOOL to... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2002 |
URL: http://orgprints.org/85/1/85.doc |
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| Graef, Frieder; Römbke, Jörg; Binimelis, Rosa; Myhr, Anne Ingeborg; Hilbeck, Angelika; Breckling, Boder; Dalgaard, Tommy; Stachow, Ulrich; Catacora-Vargas, Georgina; Bohn, Thomas; Quist, David; Darvas, Béla; Dudel, Gert; Oehen, Bernadette; Meyer, Hartmut; Henle, Klaus; Wynne, Brian; Metzger, Marc J.; Knäbe, Silvio; Settele, Josef; Székács, András; Wurbs, Angelika; Bernard, Jeannette; Murphy-Bokern, Donal; Buiatti, Marcello; Giovannetti, Manuela; Debeljak, Marko; Andersen, Erling; Paetz, Andreas; Dzeroski, Saso; Tappeser, Beatrix; van Gestel, Cornelis A.M.; Wosniok, Werner; Séralini, Gilles-Eric; Aslaksen, Iulie; Pesch, Roland; Maly, Stanislav; Werner, Armin. |
| The assessment of the impacts of growing genetically modified (GM) crops remains a major political and scientific challenge in Europe. Concerns have been raised by the evidence of adverse and unexpected environmental effects and differing opinions on the outcomes of environmental risk assessments (ERA). The current regulatory system is hampered by insufficiently developed methods for GM crop safety testing and introduction studies. Improvement to the regulatory system needs to address the lack of well designed GM crop monitoring frameworks, professional and financial conflicts of interest within the ERA research and testing community, weaknesses in consideration of stakeholder interests and specific regional conditions, and the lack of comprehensive... |
| Tipo: Journal paper |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2012 |
URL: http://orgprints.org/23020/1/Graef-etal-2012-BioRisk-Vol7-p73-97.pdf |
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| Ferreira, Victor Rodrigues; Souza, Paulo Marcelo de; Ponciano, Niraldo José; Carvalho, Almy Júnior Cordeiro de. |
| O trabalho analisa a importância do cultivo de frutas como alternativa para o aumento de renda da agricultura familiar, no contexto dos financiamentos concedidos pelo PRONAF. Os resultados evidenciaram que o recurso financeiro foi a variável que mais limitou a escolha dos agricultores. Maracujá, goiaba e pinha foram identificadas como as melhores alternativas econômicas para os produtores familiares da região. A análise permitiu concluir que a concessão do crédito, pelo PRONAF, contribui para a melhor utilização dos recursos, para a obtenção de maior renda, bem como para a geração de empregos. |
| Tipo: Journal paper |
Palavras-chave: Production systems; Fruit and berries. |
| Ano: 2003 |
URL: http://orgprints.org/22669/1/Ferreira_Fruticultura.pdf |
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| Tresch, Simon; Moretti, Marco; Le Bayon, Renée-Claire; Mäder, Paul; Zanetta, Andrea; Frey, David; Fliessbach, Andreas. |
| Gardens are hot spots for urban biodiversity and provide habitats for many plant and animal species, both above- and below-ground. Furthermore, gardens provide a wide range of ecosystem services, including carbon (C) storage and nutrient cycling. Although the soil is the foundation of sustainable gardens providing those ecosystem services, very little is known about the consequences of garden management on soil quality. Here we present a comprehensive assessment of urban garden soil quality, including biotic and abiotic site characteristics combined with land-use history and garden management information in a multivariate evaluation. A set of 44 soil quality indicators was measured at 170 sites of 85 gardens in the city of Zurich, Switzerland, comprising... |
| Tipo: Journal paper |
Palavras-chave: Soil quality Ornamentals; Flower bulbs and tree nurseries. |
| Ano: 2018 |
URL: http://orgprints.org/33244/1/tresch-etal-2018-fenvs-06-00025.pdf |
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| Cheng, Hongyuan; Friis, Alan; Høeg Hansen, Jonas; Tolderlund Rasmussen, Hanne. |
| Effects of extrusion parameters and raw materials on extrudate expansion are respectively investigated in a twin-screw extruder and a single-screw extruder extrusion cooking experiments for fish feed, wheat, and oat & wheat mixture processing. A new phenomenological model is proposed to correlated extrudate bulk density, extrusion parameters and raw material changes based on the experimental results. The average absolute deviation (AAD) of the correlation is 2.2% for fish feed extrusion in the twin-screw extrusion process. For the single-screw extrusion process, the correlation AAD is respectively 3.03%, 5.14% for wheat and oat & wheat mixture extrusion; and the correlation AAD is 6.6% for raw material change effects. The correlation results... |
| Tipo: Journal paper |
Palavras-chave: Technology assessment. |
| Ano: 2010 |
URL: http://orgprints.org/18204/1/18204.pdf |
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| Lichtenberg, Elinor M.; Kennedy, Christina M.; Kremen, Claire; Batáry, Péter; Berendse, Frank; Bommarco, Riccardo; Bosque-Pérez, Nilsa A.; Carvalheiro, Luísa G.; Snyder, William E.; Williams, Neal M.; Winfree, Rachael; Klatt, Björn K.; Åström, Sandra; Benjamin, Faye; Brittain, Claire; Chaplin-Kramer, Rebecca; Clough, Yann; Danforth, Bryan; Diekötter, Tim; Eigenbrode, Sanford D.; Ekroos, Johan; Elle, Elizabeth; Freitas, Breno M.; Fukuda, Yuki; Gaines-Day,, Hannah R.; Grab, Heather; Gratton, Claudio; Holzschuh, Andrea; Isaacs, Rufus; Isaia, Marco; Jha, Shalene; Jonason, Dennis; Jones, Vincent P.; Klein, Alexandra-Maria; Krauss, Jochen; Letourneau, Deborah K.; Macfadyen, Sarina; Mallinger, Rachel E.; Martin, Emily A.; Martinez, Eliana; Memmott, Jane; Morandin, Lora; Neame, Lisa; Otieno, Mark; Park, Mia G.; Pfiffner, Lukas; Pocock, Michael J. O.; Ponce, Carlos; Potts, Simon G.; Poveda, Katja; Ramos, Mariangie; Rosenheim, Jay A.; Rundlöf, Maj; Sardiñas, Hillary; Saunders, Manu E.; Schon, Nicole L.; Sciligo, Amber R.; Sidhu, C. Sheena; Steffan-Dewenter, Ingolf; Tscharntke, Teja; Veselý, Milan; Weisser, Wolfgang W.; Wilson, Julianna K.; Crowder, David W.. |
| Agricultural intensification is a leading cause of global biodiversity loss, which can reduce the provisioning of ecosystem services in managed ecosystems. Organic farming and plant diversification are farm management schemes that may mitigate potential ecological harm by increasing species richness and boosting related ecosystem services to agroecosystems. What remains unclear is the extent to which farm management schemes affect biodiversity components other than species richness, and whether impacts differ across spatial scales and landscape contexts. Using a global metadataset, we quantified the effects of organic farming and plant diversification on abundance, local diversity (communities within fields), and regional diversity (communities across... |
| Tipo: Journal paper |
Palavras-chave: Biodiversity and ecosystem services. |
| Ano: 2017 |
URL: http://orgprints.org/31821/1/Lichtenberg-etal-2017_GlobChangBiol_global_metastudy_arthropods_org_conv_.pdf |
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| Walkenhorst, M.; Ivemeyer, S.; Schaette, R.; Mayer, P.; Arndt, G.. |
| The gap between performance and feed intake in early lactating dairy cows often leads to metabolic imbalance which is connected to udder inflammation (UI). A study with 72 dairy cows calving from November 2010 to March 2011 on 10 Swiss and German farms was conducted to test the effect of a herbal feed additive (HFA) containing mainly Urtica dioica L. (herba), Silybum marianum (L.) Gaert. (fructus), Artemisia absinthium L. (herba) and Achillea millefolium L. (herba). Cows were stratified (farm and milk yield) randomised divided into three groups. From 14 days prior predicted calving to the end of the following lactation cows received daily 100 g pellets containing A: 100% HFA, B: 50% HFA and 50% alfalfa and C: 100% alfalfa (placebo). Two or three cows per... |
| Tipo: Journal paper |
Palavras-chave: Dairy cattle; Health and welfare. |
| Ano: 2013 |
URL: http://orgprints.org/25311/1/walkenhorst-etal-2013-PlantaMedical-79-PL25.pdf |
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| Registros recuperados: 4.506 | |
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