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| Registros recuperados: 214 | |
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| Marangoni,R.E.; Jakelaitis,A.; Tavares,C.J.; Rezende,B.P.M.; Mello Filho,O.L.; Cunha,P.C.R.. |
| This study aimed to evaluate the effects of weed interference on soybean cultivars at two sowing times in Urutaí, GO. The treatments were arranged in split-plots, and the sowing times (November 16 and December 16, 2009) were allocated in the plots; the soybean cultivars [BRSGO Amaralina, P98C81 (semi-late cycle) BRSGO Raissa, BRSGO Indiara, P98Y11 (median cycle) and BRSGO 7560, BRSGO Caiapônia, Emgopa 302RR (early cycle)] were allocated in the split-plots; and the coexistence or non coexistence of soybean cultivars with weeds, throughout their cycle, was allocated in the split-plots. Non coexistence was established by manual weeding. The experiment was arranged in randomized blocks with four replications. It was verified that the optimal time for sowing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glycine max; Competition; Crop yield. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582013000300003 |
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| Carvalho,Leonardo Bianco de; Alves,Pedro Luis da Costa Aguiar; Martins,José Valcir Fidelis. |
| Determination of competitive relationships among plant species requires appropriate experimental designs and method of analysis. The hypothesis of this research was that two species growing in coexistence show different growth and development due to their relative competitiveness. This research aims to measure the relative competitiveness of wheat crop compared to Alexandergrass by the interpretation of plant density and proportional effects using replacement series experiments. Monocultures were cultivated in densities of 1, 3, 5, 10 and 15 plants per pot and analyzed by regression of dry mass data. Mixture experiment was cultivated in wheat:Alexandergrass proportions of 0:6, 1:5, 2:4, 3:3, 4:2, 5:1 and 6:0 plants per pot and analyzed by graphical... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Brachiaria plantaginea; Triticum aestivum; Replacement series experiment. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052011000100007 |
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| ESMAEILZADEH,S.; AMINPANAH,H.. |
| ABSTRACTTo evaluate the effect of planting date and spatial pattern on common bean yield under weed-free and weed-infested conditions, an experiment was conducted in Kelachay, Northern Iran, in 2013. The experimental design was a randomized complete block in a factorial arrangement with three replicates. Factors were planting date (10 August and 20 August), spatial pattern (square and rectangular planting pattern, with a planting distance of 30 x 30 cm and 45 x 20 cm, respectively), and weed management regime (weed-free and weedy conditions, weeded and not weeded throughout the growing season, respectively). Results showed that the main effect of planting date was significant only for pod number per plant and seed number per pod. At the same time, pod... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Common bean; Competition; Planting date; Planting pattern; Phaseolus vulgaris. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582015000300425 |
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| Gomes,J.K.O.; Silva,P.S.L.; Silva,K.M.B.; Rodrigues Filho,F.F.; Santos,V.G.. |
| Intercropping combined with competitive maize cultivars can reduce the use of herbicides to control weeds. The objective of this work was to evaluate the effects of intercropping cowpea and maize, as well as hand-weeding on maize morphology and yield. The experimental design was in randomized complete blocks, with treatments arranged in split-plots and five replications. The plots consisted of four maize cultivars (BA 8512, BA 9012, EX 4001, EX 6004) and the split-plots consisted of the following treatments: no-weeding; twice hand-weeding (20 and 40 days after sowing); and intercropping with cowpea ('Sempre Verde' cultivar), both maize and cowpea sown at the same time. The variables evaluated were: maize fresh green ears and grain yield; characteristics of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Zea mays L.; Green ears; Grain yield; Competition; Vigna unguiculata (L) Walp. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582007000300001 |
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| Ronchi,C.P.; Silva,A.A.. |
| The effects of competition of seven weed species on the growth of coffee plants were evaluated under greenhouse conditions. Thirty days after coffee seedling transplantation into 12 L pots with soil level area of 6.5 dm², weeds were transplanted into or sown in those pots, at densities of 0, 1, 2, 3, 4 and 5 plants per pot. Competition or weedy periods from weed transplantation or emergence to plant harvesting, at weed pre-flowering stage, were: 77 days - Bidens pilosa, 98 days - Brachiaria decumbens, 180 days - Commelina diffusa, 82 days - Leonurus sibiricus, 68 days - Nicandra physaloides, 148 days - Richardia brasiliensis and 133 days - Sida rhombifolia. Coffee plant height, stem diameter, leaf number and shoot dry matter were determined. Effects of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Density; Coffea arabica; Competition; Weedy period. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582006000300001 |
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| Putsis, William P., Jr.. |
| This paper provides an overview of recent research on estimating competitive interaction in food product categories. In particular, the focus of this review is on research using scanner data conducted at the disaggregate (e.g., store, chain or local market) level, including empirical studies of vertical (i.e., within-channel) conduct. Studies addressing the competitive interaction on price, as well as non-price variables (e.g., in-store display and feature advertising) are considered. The author first describes the methodologies available for measuring the competitive interaction between firms and then briefly summarizes recent empirical developments. Given the complexity of the interactions that take place in practice, it is argued that much of the... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Competition; Competitive strategy; Channel behavior; Agribusiness; Demand and Price Analysis; Industrial Organization. |
| Ano: 1998 |
URL: http://purl.umn.edu/25221 |
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| Jacobs,Jennifer; Nole,Inés; Palminteri,Susanne; Ratcliffe,Brett. |
| Dung beetles (Coleoptera: Scarabaeidae: Scarabaeinae) compete intensively for dung resources, and most species forage in the understory. Here, we describe the unique behavior of one dung beetle species, Canthon aff. quadriguttatus (Olivier), associated with two species of monkeys from Peru. We observed this beetle species on the genital and anal regions of the brown titi monkey, Callicebus brunneus (Wagner), and subsequently falling with dung as the monkeys defecated. The same association was also observed with the bald-faced saki monkey, Pithecia irrorata irrorata (Gray). Using the " sit and wait" at the source behavior, C. quadriguttus may arrive first at the dung resource, possibly out-competing other dung beetle species. This paper is the first report... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Resource partitioning; Phoresy; Niche specialization. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-566X2008000600003 |
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| Montagna,Thiago S.; Neves,Érika F.; Antonialli-Junior,William F.. |
| First report of interspecific facultative social parasitism in the paper wasp genus Mischocyttarus Saussure (Hymenoptera, Vespidae). Parasitism of colonies of the social wasp Mischocyttarus cerberus Ducke, 1918 by females of Mischocyttarus consimilis Zikán, 1949 was observed in a rural area of Dourados, state of Mato Grosso do Sul, Brazil. In all monitored cases, the invasion occurred in the pre-emergence colony stage, generally by a single female of M. consimilis. The period of establishment of the foreign female in the host colony was marked by antagonistic behaviors between the host female and the invasive. In general, the architecture of the parasitized nest was modified from the typical architecture of the host species nest. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Interaction; Independent foundation; Neotropical wasp. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0085-56262012000200016 |
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| de Felipe, Isabel; Briz, Julian. |
| Food chain analysis is becoming a useful instrument to increase efficiency. We focus the attention in the fish sector looking at the links from consumer to wholesalers in the region of Madrid. In order to get adequate information we developed face to face enquiries to the consumers, retailers and wholesalers. The analysis of the Madrid market give us a useful approach of the national and international sector, due to the fact that Mercamadrid is the biggest fish wholesale market in Europe, and the consumption in Madrid is representative in many ways of the Spanish market. Finally there are some conclusions and recommendations oriented toward the stakeholders. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Fish; Food chain; Performance; Competition; Agribusiness. |
| Ano: 2004 |
URL: http://purl.umn.edu/24987 |
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| Registros recuperados: 214 | |
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