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| Registros recuperados: 214 | |
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| Dimitri, Carolyn; Tegene, Abebayehu; Kaufman, Phillip R.. |
| Retail consolidation, technological change in production and marketing, and growing consumer demand for produce have altered the traditional market relationships between producers, wholesalers, and retailers. Increasingly, produce suppliers are asked to provide additional marketing services and incentives in exchange for volume purchases and other commitments by buyers. This report synthesizes the results from a multiphase project that examined the dynamics of produce marketing, the produce shipper-retailer relationship, and how changes in the produce market affect the relative market influence of producers, retailers, and consumers. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Fresh fruits and vegetables; Fresh produce; Fresh produce marketing channels; Supermarket; Market power; Competition; Trading practices; Crop Production/Industries; Industrial Organization. |
| Ano: 2003 |
URL: http://purl.umn.edu/33907 |
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| Lasowski, Ophir; Kuhl, Rainer. |
| Cooperatives are not only a legal form, but also a form of organisation, which is owned by a group of individuals. For gaining and sustaining competitiveness cooperatives are forced to grow into certain minimum optimal size categories. Common measures of size are turnover or total assets. But, for cooperatives the number of members has been a quite popular measure for cooperatives' success, size, and their attractiveness. Although often mentioned, the number of members has only been taken as a given value, ignoring the influence of the group itself on its own size. However, there has been no attempt to measure the potential size of a group and its growth dynamic under a given set-up. With the development of a strategic decision game for a hypothetical... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Cooperatives; Growth Dynamic; Group-Size; Competition; Member-Value; Strategic Game; Agribusiness. |
| Ano: 2006 |
URL: http://purl.umn.edu/14974 |
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| SANTOS,R.N.V.; PIRES,T.P.; MESQUITA,M.L.R.; CORREA,M.J.P.; SILVA,M.R.M.. |
| ABSTRACT: In organic systems during the dry season, competition of weeds with okra increases the critical period of interference of these species and yield losses. The objective of this research was to determine the critical period of weed interference in organic okra during the dry season in São Luís - MA. The experiment was conducted from October/2014 to January/2015 in randomized blocks, with four replicates. The treatments were the periods of 07, 14, 21, 28, 35, 42 days after the transplanting of the crop with control and coexistence of the infesting community. The species with the highest importance value index were Cynodon dactylon, Eleusine indica, Amaranthus spinosus and Commelina benghalensis. The CPWI was 04 to 53 days after transplanting and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abelmoschus esculentus (L.) Moench.; Competition; Water deficit; Weed community. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100214 |
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| CASTRO,T.S.; ROCHA,P.R.R.; BARRETO,G.F.; MAIA,S.S.; ALBUQUERQUE,J.A.A.; ALVES,J.M.A.. |
| ABSTRACT: This study aimed to determine weed interference periods in semi-erect and semi-prostrate cowpea cultivars. Two simultaneous experiments were conducted with the cowpea cultivars BRS Guariba (semi-erect) and BRS Aracê (semi-prostrate). The experimental design was a randomized block design with four replications in a 7 × 2 factorial scheme, seven periods × two weed management (control and coexistence). Control and coexistence periods consisted of 0, 0-8, 0-16, 0-24, 0-32, 0-45, and 0-60 days after emergence (DAE) for the semi-erect cultivar and 0, 0-8, 0-16, 0-24, 0-32, 0-45, and 0-64 DAE for the semi-prostrate cultivar. Competition throughout the cycle reduced productivity by up to 39.81% for BRS Guariba and 37.27% for BRS Aracê. The cultivars BRS... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vigna unguiculata; Competition; Interference periods. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100277 |
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| SANTOS,G.C.; MAIA,V.M.; ASPIAZÚ,I.; PEREIRA,M.C.T.; DONATO,S.L.R.; NOBRE,D.A.C.. |
| ABSTRACT: In the state of Minas Gerais, the northern region is one of the main banana production cores. Weed interference can reduce crop growth and, consequently, lead to reduced yield and fruit quality. Therefore, the objective of this study was to evaluate the interference of weeds in the production of the first and second cycles of ‘Prata-Anã’ bananas. The experimental design was randomized blocks, with ten treatments and three replicates, evaluated in two crop cycles. The treatments were ten periods of weed control, from planting: without control; control throughout the whole experimental period; control only in the first month after planting; control until the second; third; fourth; fifth; sixth; eighth and tenth months after planting. The agronomic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Musa spp.; Competition; Control. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582019000100150 |
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| ULJOL,L.H.O.; BIANCO,S.; FILHO,A.B.C.; BIANCO,M.S.; CARVALHO,L.B.. |
| ABSTRACT: The objective of this work was to determine the interference periods of weeds of the bell pepper cultivar ‘Dahra’. Two experiments were conducted during the years 2014/15 (harvest with lower rainfall) and 2015/16 (harvest with higher rainfall). The treatments consisted of 11 growing periods of cohabitation and weed control with ‘Dahra’ bell peppers: 14, 28, 42, 56, 70, 84, 98, 112, 126, 140 and 154 days after transplanting (DAT). For the determination of the interference periods, the productivity data were analyze using the Boltzmann sigmoidal regression model. The main weeds were Eleusine indica, Brachiaria plantaginea, Digitaria nuda and Nicandra physaloides for presenting high biomass and relative density. The concomitance of these weeds... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Capsicum annuum; Competition; Coexistence. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582018000100247 |
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| Galon,Leandro; Basso,Felipe José Menin; Chechi,Leonardo; Pilla,Thalita Pedrozo; Santin,Carlos Orestes; Bagnara,Maico André Michelon; Franceschetti,Milena Barretta; Castoldi,Camile Thaís; Perin,Gismael Francisco; Forte,César Tiago. |
| ABSTRACT The study of weed interference periods and the economic threshold level (ETL) of weeds on crops allows the adoption of management methods and the rationalized use of herbicides. The objective of this study was to determine the periods of interference and to test mathematical models to determine the economic threshold level of ryegrass in the wheat crop. Two experiments were carried out in a randomized block design with four replications. The first experiment was conducted in the 2014/2015 agricultural season. The periods of interference and control of ryegrass were studied in wheat. The periods of interference and/or control were: 0, 10, 20, 30, 40, 50 and 120 days after emergence (DAE). The second experiment was conducted in the 2016/2017... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triticum aestivum; Lolium multiflorum; Competition. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052019000300409 |
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| SOUZA,J.I.; SILVA,A.A.P.; CHAGAS,R.R.; OLIVEIRA NETO,A.M.; MACIEL,C.D.G.; RESENDE,J.T.V.; ONO,E.O.. |
| ABSTRACT The study was conducted with the objective of determining the critical periods of interference prevention (CPIP) and the best period for the management of weeds community in onion crop Crioula Mercosul genotype, transplanted in distinct plants densities. The experiment was carried out in field conditions in the Brazilian municipality of Guarapuava, Paraná State, during the 2012 and 2013 agricultural years, at Universidade Estadual do Centro-Oeste - UNICENTRO. Treatments were disposed in randomized complete blocks and experimental design, with five repetitions, consisting of weeds coexistence periods and weeds control at 14, 28, 56, 112 and 168 days after transplanting the seedlings (DATS), using 0.6, 0.8 and 1.0 million plants ha-1. Weeds... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allium cepa; Competition; Plant arrangement; Bulb yield. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200299 |
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| SILVA,A.A.P.; OLIVEIRA NETO,A.M.; NAIARA,G.; KARPINSKI,R.A.K.; MACIEL,C.D.G.. |
| ABSTRACT Several factors can influence wheat crop yield, they include the interference imposed by weeds is one of the most important. The objective of this study was to evaluate the critical periods of weed interference in early wheat in the midwest of the state of Paraná, Brazil. The experiment was conducted in an experimental area located in Campo Mourão - PR, during the year 2013, using the BRS Pardela cultivar. The treatments consisted of periods of coexistence and weed control in wheat. Periods of coexistence and control were 0, 7, 14, 28, 35 and the whole cycle at days after crop emergence (DAE). Number of reproductive tillers per plant, spike length, number of spikelets per spike, plant height and wheat crop yield, were significantly affected by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Raphanus raphanistrum; Triticum aestivum. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582016000200291 |
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| Lins,Hamurábi Anizio; Souza,Matheus de Freitas; Albuquerque,José Ricardo Tavares de; Santos,Manoel Galdino dos; Barros Júnior,Aurélio Paes; Silva,Daniel Valadão. |
| ABSTRACT The sesame crop (Sesamum indicum L.) is sensitive to competition with weeds because of its low competitiveness that is directly linked to its slow initial growth. The control of weeds in the crop is an essential practice to ensure the high productivity of this oilseed. Therefore, to define the critical period of interference prevention is important to ensure efficiency and low control costs. Factors such as cultivar, environmental conditions, and cultivation system may alter the critical weed interference prevention period (CPWC). Therefore, the objective of this work was to determine the critical weed interference prevention period in two sesame cultivars. The critical weed interference prevention period for sesame cultivars, BRS Seda and CNPA... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Competition; Leaf area; Plant height; Productivity; Oilseeds.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100220 |
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| Sauterey, Boris; Ward, Ben A.; Follows, Michael J.; Bowler, Chris; Claessen, David. |
| The functional and taxonomic biogeography of marine microbial systems reflects the current state of an evolving system. Current models of marine microbial systems and biogeochemical cycles do not reflect this fundamental organizing principle. Here, we investigate the evolutionary adaptive potential of marine microbial systems under environmental change and introduce explicit Darwinian adaptation into an ocean modelling framework, simulating evolving phytoplankton communities in space and time. To this end, we adopt tools from adaptive dynamics theory, evaluating the fitness of invading mutants over annual timescales, replacing the resident if a fitter mutant arises. Using the evolutionary framework, we examine how community assembly, specifically the... |
| Tipo: Text |
Palavras-chave: Phytoplankton; Competition; Trait-based adaptive strategies; Adaptive dynamics; Eco-evolutionary dynamics; Trade-off; Community; Global circulation model. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00617/72883/71917.pdf |
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| Шульман, Г. Е.; Никольский, В. Н.; Юнева, Т. В.; Щепкина, А. М.; Бат, Л.; Кидейш, А. Е.. |
| Рассмотрена многолетняя динамика содержания жира у шпрота и анчоуса Чёрного моря как индикаторов обеспеченности пищей в связи с температурой воды, концентрацией фитопланктона, величинами запасов и уловов этих рыб. Глобальным климатическим фактором, оказывающим прямое и косвенное влияние на обеспеченность мелких пелагических рыб Чёрного моря пищей, является температура. Региональные факторы, воздействующие на состояние шпрота и анчоуса, – пищевая конкуренция, речной сток и загрязнение водной среды. |
| Tipo: Journal Contribution |
Palavras-chave: Шпрот; Анчоус; Содержание жира; Обеспеченность пищей; Температура; Конкуренция; Фитопланктон; Запасы и уловы; Чёрное море; Sprat; Anchovy; Fat content; Food supply; Temperature; Competition; Phytoplankton; Stocks and yields; Black Sea; Камса; Вміст жиру; Забезпеченість їжею; Конкуренція; Фітопланктон; Вилови; Чорне море. |
| Ano: 2007 |
URL: http://repository.ibss.org.ua/dspace/handle/99011/854 |
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| Registros recuperados: 214 | |
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