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Adaptabilidade e estabilidade produtiva de feijão-caupi de porte semiprostrado. Repositório Alice
BARROS, M. A.; ROCHA, M. de M.; GOMES, R. L. F.; SILVA, K. J. D. e; NEVES, A. C. das.
O objetivo deste trabalho foi avaliar a adaptabilidade e a estabilidade produtiva de genótipos de feijão-caupi (Vigna unguiculata) de porte semiprostrado. Foram avaliados 20 genótipos de feijão-caupi com uso do modelo de efeitos aditivos principais e interação multiplicativa (AMMI) com genótipo e ambiente suplementares. Os ensaios foram conduzidos em nove ambientes (Balsas, MA, 2010; Balsas, MA, 2011; Bom Jesus, PI, 2010; Bom Jesus, PI, 2011; São Raimundo das Mangabeiras, MA, 2010; São Raimundo das Mangabeiras, MA, 2011; São João do Piauí, PI, 2011; Campo Grande do Piauí, PI, 2011; Buriti, MA, 2011), da região Meio‑Norte do Brasil, em delineamento de blocos ao acaso, com 20 tratamentos e quatro repetições. Os efeitos de genótipos, ambientes e da...
Tipo: Artigo de periódico Palavras-chave: Ambiente suplementar; Genótipo suplementar; Produtividade de grãos; Previsibilidade; Predictability; Supplementary environment; Supplementary genotype.; Vigna unguiculata; Grain yield; Ammi..
Ano: 2013 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/962543
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IS A PUBLIC REGULATION OF FOOD PRICE VOLATILITY FEASIBLE IN AFRICA? AN ARCH APPROACH IN KENYA AgEcon
Maitre d'Hotel, Elodie; le Cotty, Tristan; Jayne, Thomas S..
The 2007-2008 food crisis and current food price swings led economists to re-evaluate the potential for policy instruments to manage food price volatility. Many developing countries recently pursued price regulation policies, but the difficulties of these policies in promoting price stability is not fully understood. In particular, the ability of a stabilization policy to lower food price volatility does not depend on the nature of the policy instrument only, but also on the institutional conditions of its implementation. Kenya is a particularly interesting case as it is characterized by a rather long tradition of public intervention, and by the persistence of highly volatile prices. The consistency of the policy use appears to be key factor influencing...
Tipo: Presentation Palavras-chave: Volatility; Predictability; Consistency; Food; Policy; Kenya; Food Security and Poverty; International Development; Risk and Uncertainty; D84; Q13; Q18.
Ano: 2012 URL: http://purl.umn.edu/122551
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Nitrogen efficiency in oats on grain yield with stability AGRIAMBI
Silva,José A. G. da; Goi Neto,Constantino J.; Fernandes,Sandra B. V.; Mantai,Rubia D.; Scremin,Osmar B.; Pretto,Rafael.
ABSTRACT Nitrogen (N) is the nutrient most absorbed by the oat crop. Unfavorable climate conditions decrease its efficiency, generating instability and reduction in yield. The objective of this study was to improve N use efficiency in oat grain yield by the economic value of the product and of the input and by models that scale the stability, considering systems of succession of high and reduced residual-N release in favorable and unfavorable years for cultivation. The study was conducted in the years 2013, 2014 and 2015 in two systems of succession (soybean/oat, maize/oat) in randomized blocks with eight replicates, using the N-fertilizer doses of 0, 30, 60 and 120 kg ha-1. The N-fertilizer dose for maximum economic efficiency in oats should be considered...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Avena Sativa; C/N; Predictability; Biometric models; Optimization.
Ano: 2016 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662016001201095
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Restoring Riparian Ecosystems: The Challenge of Accommodating Variability and Designing Restoration Trajectories Ecology and Society
Hughes, Francine M. R; Anglia Polytechnic University; f.hughes@apu.ac.uk; Colston, Adrian; Wicken Fen National Nature Reserve; adrian.colston@nationaltrust.org.uk; Mountford, J. Owen; NERC Centre for Ecology and Hydrology; om@ceh.ac.uk.
Flood disturbance processes play a key role in the functioning of riparian ecosystems and in the maintenance of biodiversity along river corridors. As a result, riparian ecosystems can be described as mobile habitat mosaics characterized by variability and unpredictability. Any river restoration initiative should aim to mimic these attributes. This paper suggests that there needs to be an increased institutional capacity to accept some levels of both variability and unpredictability in the ecological outcomes of river restoration projects. Restoration projects have frequently used some form of historical or contemporary reference system to define objectives and to help in the evaluation process. Using these reference systems can give a false sense of the...
Tipo: Peer-Reviewed Synthesis Palavras-chave: River restoration; Predictability; Variability; Restoration trajectories; Reference systems; Wicken Fen; Floodplain forests; Restoration objectives; Restoration evaluation.
Ano: 2005
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SST Indexes in the Tropical South Atlantic for Forecasting Rainy Seasons in Northeast Brazil ArchiMer
Hounsou-gbo, Gbekpo Aubains; Servain, Jacques; Araujo, Moacyr; Caniaux, Guy; Bourles, Bernard; Fontenele, Diogenes; Martins, Eduardo Savio P. R..
May-to-July and February-to-April represent peak rainy seasons in two sub-regions of Northeast Brazil (NEB): Eastern NEB and Northern NEB respectively. In this paper, we identify key oceanic indexes in the tropical South Atlantic for driving these two rainy seasons. In Eastern NEB, the May-to-July rainfall anomalies present a positive relationship with the previous boreal winter sea surface temperature anomalies (SSTA) in the southeast tropical Atlantic (20 degrees-10 degrees S; 10 degrees W-5 degrees E). This positive relationship, which spread westward along the southern branch of the South Equatorial Current, is associated with northwesterly surface wind anomalies. A warmer sea surface temperature in the southwestern Atlantic warm pool increases the...
Tipo: Text Palavras-chave: Brazilian Northeast; Rainfall; Predictability; Tropical Atlantic.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00623/73547/73807.pdf
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THE PERFORMANCE OF AGRICULTURAL MARKET ADVISORY SERVICES IN MARKETING WHEAT AgEcon
Jirik, Mark A.; Irwin, Scott H.; Good, Darrel L.; Jackson, Thomas E.; Martines-Filho, Joao Gomes.
The purpose of this paper is to investigate the performance of agricultural market advisory services in marketing wheat. Two key performance questions are addressed: 1) Do market advisory services, on average, outperform an appropriate wheat market benchmark? and 2) Do market advisory services exhibit persistence in their wheat performance from year-to-year? Market advisory service recommendations for wheat are available from the AgMAS Project for the 1995, 1996, 1997 and 1998 marketing years. At least 20 advisory programs are included for each year. Tests of pricing performance relative to a market benchmark are based on the proportion of programs exceeding the benchmark price and the average percentage difference between the net price of advisory...
Tipo: Conference Paper or Presentation Palavras-chave: Wheat; Market advisory service; Benchmark; Market efficiency; Pricing performance; Predictability; Crop Production/Industries; Marketing.
Ano: 2000 URL: http://purl.umn.edu/18928
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