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| Registros recuperados: 214 | |
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| Dias,A.C.R.; Carvalho,S.J.P.; Marcolini,L.W.; Melo,M.S.C.; Christoffoleti,P.J.. |
| Weeds compete with field crops mainly for water, light and nutrients, and the degree of competition is affected by the weed density and the intrinsic competitive ability of each plant species in coexistence. The objective of this research was to compare the competitiveness of alexandergrass (Brachiaria plantaginea) or Bengal dayflower (Commelina benghalensis) in coexistence with soybean, cv. M-Soy 8045. A factorial experiment (2 x 5) with two weed species and five competition proportions was carried out in a completely randomized design with four replicates. Proportions were based on a replacement series competition design, always maintaining the total density of four plants per 10 L plastic pots, which corresponded to 60 plants m ². The weed-crop... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Brachiaria plantaginea; Commelina benghalensis; Competition; Dry mass; Substitutive series. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582010000300008 |
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| Azevedo, Paulo Furquim de; Politi, Ricardo Batista. |
| This article aims to evaluate the degree of competition in the dairy industry, in the relevant markets of Ultra High Temperature (UHT) milk and pasteurized milk, by means of price transmission and marketing margin behavior. The empirical analysis is based on the model formerly proposed by Houck (1977) and latter detailed by Carman and Sexton (2005).This model analyzes separately the effects of input price increases and reductions on consumer prices, allowing for estimations of price transmission and margin behavior. Cepea-USP and Fipe provide, respectively, weekly input prices and consumer prices, both for the period of December 1999 to December 2005. As a major result, the degree of competition in the UHT relevant market was found to be robustly different... |
| Tipo: Journal Article |
Palavras-chave: Competition; Price transmission; Dairy industry.; Agribusiness; L11; Q13. |
| Ano: 2008 |
URL: http://purl.umn.edu/61234 |
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| Saraiva,A.S.; Erasmo,E.A.L.; Mata,J.F.; Dornelas,B.F.; Dornelas,D.F.; SILVA,J.I.C.. |
| The aim of this study was to evaluate the growth and yield of soybean cultivar M-8766 in consortium with Brachiaria brizantha. BRS Piata and Brachiaria ruziziensis at different densities and sowing dates. The experimental design was randomized blocks with treatments arranged in a factorial 2 x 2 x 3 with four replications. Used as factors grass species (Brachiaria brizantha Piata and Brachiaria ruziziensis BRS) intercropped with soybean M-8766, sowing dates (12 and 24 days after soybean emergence) and three seeding rates (0, 5, 10 kg ha-1 of seed). At 71 days after soybean emergence were evaluated plant height, stem diameter, dry mass of leaves, stems and shoots, and 4 months after sowing determined the weight of 100 grains and soybean yield. The results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Glycine max; Brachiaria brizantha; Brachiaria ruziziensis; Crop-livestock integration; System holy faith. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300009 |
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| SÁ-OLIVEIRA,JÚLIO C.; ANGELINI,RONALDO; ISAAC-NAHUM,VICTORIA J.. |
| We investigated the niche breadth and overlap of the fish species occurring in four environments affected by the Coaracy Nunes reservoir, in the Amapá Brazilian State. Seasonal samples of fishes were taken using a standard configuration of gillnets, as well as dragnets, lines, and castnets. Five hundred and forty stomach contents, representing 47 fish species were analyzed and quantified. Niche breadth and overlap were estimated using indexes of Levins and Pianka, respectively, while interspecific competition was evaluated using a null model (RA3). ANOVA and the KruskalWallis test were used, respectively, to evaluate differences in niche breadth and overlap between areas. The data indicate that the majority of the fish species belong to the piscivore,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Neotropical reservoir; Diet; Species coexistence. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100383 |
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| Proença, Barbara; Romuald, Marine; Auby, Isabelle; Ganthy, Florian; Sottolichio, Aldo; Michalet, Richard. |
| Ecosystem engineering effects of dominant species on habitats and consequently on other species are likely to propagate through time at longer distance than the close neighbourhood. Such effects are important to disentangle from short-term biotic effects, especially in biological invasions, as engineering can explain changes in invasion rates over the course of the invasion. We assessed the contribution and spatial dynamics of ecosystem engineering effects of a strong invader, the cordgrass Spartina anglica, on Zostera noltei, a foundation seagrass species of muddy intertidal systems in Europe. Z. noltei transplants were grown at different positions along transects crossing intact S. anglica patches, cut patches and nearby bare sediment on tidal flats in... |
| Tipo: Text |
Palavras-chave: Biological invasion; Competition; Ecosystem engineer; Spartina anglica; Zostera noltei. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00507/61875/67507.pdf |
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| FERREIRA,Débora Najara de SOUZA; CAMARGO,José Luís Campana; FERRAZ,Isolde Dorothea Kossmann. |
| ABSTRACT Polyembryony is the differentiation and development of multiple embryos in a single seed. This characteristic can provide advantages, as more than one embryo is produced with the same amount of resources, and the probability of establishment of at least one seedling increases. However, sibling seedlings may also increase competition, affecting development and survival. In the present study, the possible advantages and disadvantages of polyembryony were analyzed in the initial establishment of seedlings of Carapa surinamensis (Meliaceae), a tree species that produces monoembryonic or polyembryonic seeds. In this regard, the development of single seedlings was compared with a pair of seedlings emerging from polyembryonic seeds. We compared the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polyembryony; Andiroba; Crabwood; Seedling production; Competition. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672019000200097 |
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| Martens, M. Andrea. |
| This study analyzes Wal-Mart’s pricing practices and its influence on competitors’ input cost transmission. Previous attempts to analyze Wal-Mart’s pricing strategy in the United States have been limited by the company’s refusal to provide scanner data to third party research firms such as AC Nielsen. This is the first study to observe Wal-Mart’s prices over an extended period of time. Using weekly-store level price data between 2001 and 2006 that government officials collected in 12 Mexican cities, I find that Wal-Mart adjusts its prices 1/3-3 times slower to wholesale price increases than other retailers and responds 5-7 times faster to wholesale price decreases than its competitors. This evidence is robust to the comparison of Wal-Mart to other hypermarkets... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Wal-Mart; Cost pass-through; Competition; Agribusiness; Industrial Organization. |
| Ano: 2009 |
URL: http://purl.umn.edu/49459 |
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| Oliveira,C.; Agostinetto,D.; Vargas,L.; Ávila,L.A.; Tarouco,C.P.. |
| The objective this work was to investigate the competitive ability between resistant and susceptible ryegrass biotypes and of these with soybean crop. Four experiments were carried under greenhouse, in a completely randomized design with four replications, in 2011 and 2012. Treatments were arranged in additive series and replacement series assay. In each series, the proportions among ryegrass resistant and susceptible plants related to soybean were: 100:0, 75:25, 50:50, 25:75 e 0:100. Leaf area and shoot dry mass were evaluated. Competitiveness statistical analysis consisted in applying diagrams to the replacement series and alternative interpretations of the competitiveness indexes. The soybean crop had equivalent competitiveness to the susceptible... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lolium multiflorum; Glycine max; Competition. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000100021 |
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| Kalaydjian, Regis; Girard, Sophie. |
| The "French Maritime Economic Data" report is periodically published by Ifremer since 1997. It presents an economic assessment of the French maritime activities, their position in the national economy and in the world competition, as well as the significance of non market public services. Maritime activities in the industrial sector are assessed using a standard metrics to facilitate the periodical update of the report: turnover, gross value added, employment, number of enterprises, exports. These indicators are expressed at national level. The public sector is described by annual budgets, number of staff and personnel costs, broken down into the different public policy functions. Regional indicators are provided on activities whenever relevant and... |
| Tipo: Text |
Palavras-chave: Economie; Concurrence; Croissance; Emploi; Environnement; Europe; France; Industrie; Marin; Maritime; Valeur ajoutée; Secteur public; Services.; Economy; Competition; Employment; Environment; Europe; France; Growth; Industry; Marine; Maritime; Public sector; Value added; Services.. |
| Ano: 2017 |
URL: http://archimer.ifremer.fr/doc/00388/49962/50614.pdf |
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| Wilson, William W.; Dahl, Bruce L.. |
| The purpose of this paper is to analyze the dynamics of R&D investments, and the structure of the seed distribution sector using novel data sets that have not been used before to describe competition in these industries. The results describe four sets of issues of particular importance. One is that while all agbiotechology firms have increased their R&D expenditures, there have been sharp differences in the scope of this spending. Most important is that this has spawned the growth in what is now referred as “seeds and traits.” Second, a large number of future traits will be commercialized in the coming years. A third set of results indicates that one firm grew its market share by 14% and a portion of this growth has been through acquisition. The... |
| Tipo: Report |
Palavras-chave: Agbiotechnology; Grain seeds; Competition; Agribusiness; Crop Production/Industries; Demand and Price Analysis. |
| Ano: 2010 |
URL: http://purl.umn.edu/58487 |
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| Alvarez Moreno, Gumercindo; Rodríguez Garcia, Roselyn; Flores Montano, Amelia. |
| Aloe Vera is the base of a very lucrative business around the world, in which Mexico participates as the main Aloe Vera raw materials producer and exporter country. For the perishable nature of Aloe Vera raw materials, they go under a stabilization process that fulfills the final consumer requirements. Many of the companies certify their raw materials, processes and final products in order to guarantee to the final consumer the origin, purity, and product content, besides the ethical strictness of their promotional and commercial information. The certifying council (International Aloe Science Council) express in their promotion that certified companies are more competitive than those that don't certify their products. However, since the lack of evidences... |
| Tipo: Article |
Palavras-chave: Competition; Aloe Vera processor; Competitive profile; Certification seal; Raw materials.; Agribusiness. |
| Ano: 2012 |
URL: http://purl.umn.edu/120500 |
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| Registros recuperados: 214 | |
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