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| Registros recuperados: 10 | |
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| Santorum, Márcia; Universidade Estadual do Oeste do Paraná; Nóbrega, Lúcia Helena Pereira; Universidade Estadual do Oeste do Paraná; Souza, Eduardo Godoy de; Universidade Estadual do Oeste do Paraná; Santos, Diego dos; Universidade Federal da Fronteira Sul; Boller, Walter; Universidade de Passo Fundo; Mauli, Márcia Maria; Universidade Estadual do Oeste do Paraná. |
| The objective of this study was to compare tests used to identify vigor in soybean seeds and to establish a model that relates the seeds’ vigor, as determined in the laboratory, with field emergence. Five soybean cultivars were evaluated based on their germination, sand emergence, immersion in sodium hypochlorite, accelerated aging, controlled deterioration, cold test, seedling growth, electrical conductivity, tetrazolium, emergence percentage, seedling length in the field and seedling dry weight. The experimental design was completely randomized and means were compared by the Tukey test at 5% probability. Assays for accelerated aging, controlled deterioration and tetrazolium showed the closest correlation to field emergence. The regression model included... |
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Palavras-chave: Fitotecnia germination; Seeds quality; Regression model Produção e Beneficiamento de sementes germination; Seeds quality; Regression model. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/14955 |
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| Zangeneh, Morteza; Banaeian, Narges. |
| For determination and assessing the effect of agricultural mechanization in irrigated corn of Iran, two indicators have been used: cultivated area (ha) and yield (kg/ha). Several regression models have been built, using Mechanization Level (ML) and Mechanization Ownership (MO) of all agricultural operations, as input, and cultivated area and yield as output, separately. The survey was carried out by means of data obtained from Agricultural Ministry of Iran in the period of 2001-2008. The results revealed that mechanization ownership of planting and harvesting have a significant effect on cultivated area of corn in Iran with 95% and 99% confidence, respectively. Based on obtained results, agricultural mechanization has an important role in improvement... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Yield; Regression model; Mechanization.. |
| Ano: 2014 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/2007 |
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| Galán Suárez, Erika Paola. |
| El presente trabajo estudia el proceso de transmisión de precios en la cadena comercial de la carne de res en México. Para esto se consideran precios mensuales de la carne de res en canal y de las presentaciones bistec, molida, retazo y cortes, donde la transmisión estudiada es de carne en canal al consumidor. Dado que los datos presentan evidencia de raíz unitaria el análisis de regresión puede ser inapropiado por el problema de regresión espuria. Por tanto, se emplea la prueba de co-integración de Johansen no rechazando la hipótesis de un vector co-integrante para los pares canal-bistec, canal-molida, canal-retazo y canal-cortes, implicando que existe una relación de largo plazo entre los pares de productos considerados. Se estima la elasticidad de... |
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Palavras-chave: Transmisión de precios; Elasticidad de transmisión de precios; Modelo de regresión; Price transmission elasticity; Regression model; Maestría; Economía. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/477 |
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| Galán Suárez, Erika Paola. |
| El presente trabajo estudia el proceso de transmisión de precios en la cadena comercial de la carne de res en México. Para esto se consideran precios mensuales de la carne de res en canal y de las presentaciones bistec, molida, retazo y cortes, donde la transmisión estudiada es de carne en canal al consumidor. Dado que los datos presentan evidencia de raíz unitaria el análisis de regresión puede ser inapropiado por el problema de regresión espuria. Por tanto, se emplea la prueba de co-integración de Johansen no rechazando la hipótesis de un vector co-integrante para los pares canal-bistec, canal-molida, canal-retazo y canal-cortes, implicando que existe una relación de largo plazo entre los pares de productos considerados. Se estima la elasticidad de... |
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Palavras-chave: Transmisión de precios; Elasticidad de transmisión de precios; Modelo de regresión; Price transmission elasticity; Regression model; Maestría; Economía. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/477 |
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| Christoforo,André L.; Arroyo,Felipe N.; Silva,Diogo A. Lopes; Panzera,Tulio H.; Lahr,Francisco A. R.. |
| ABSTRACT: Wood is a material that for years has been used by man for a variety of purposes, particularly in rural and civil constructions and furniture industry. The possibility of shortages of some wood species, the characterization of other unfamiliar species is an alternative source for use in civil and rural construction. This study aimed to determine, with the aid of Brazilian standard NBR 7190, physical and mechanical properties of Castelo (Calycophyllum multiflorum) wood specie. Twelve determinations were obtained by property, totaling 204 experimental values. In the characterization of wood, regression models were used to estimate the values of timber strength and stiffness as a function of apparent density, being density the physical property more... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Calycophyllum multiflorum; Physical-mechanical properties; Hardwood; Regression model. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000400637 |
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| Harry, Edric. |
| The research undertaken was four-fold. First, to investigate whether government policy provides protection and by extension, incentives for the local table egg farmers to remain in production. To do so, EPC's for all commercial farms in the industry were estimated to arrive at a weighted or industry EPC. The study also investigated whether the local tables egg industry had a comparative advantage or was efficient in the production of table egg. The Domestic Resource Cost (DRC) coefficient was used as a proxy of efficiency and comparative advantage. DRC's were calculated for the twenty-three farms. Having established that the industry was competitive, a sensitivity analysis was conducted to determine the extent to which feed costs, the major... |
| Tipo: Journal Article |
Palavras-chave: Regression model; Table egg industry; Domestic Resource Cost (DRC); Sensitivity; Agricultural and Food Policy. |
| Ano: 2007 |
URL: http://purl.umn.edu/36799 |
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| Medonos, Tomas; Vilhelm, Vaclav; Hruska, Martin; Jelinek, Ladislav. |
| The paper deals with the analysis of market land prices that were collected from land purchased contracts in the Czech Republic. Regression model was used to identify determinants explaining variability of market prices between 2008 and 2009. It was found out that type of plantation, region, type of buyers, plot size, distance to regional city or number of parcels play significant role. These factors explain more than a half of variance in land price. Quality of land that was expressed through administrative price has significant effect on market price. Yet, such effect became less import in regions nearby cities (e.g. Prague and Olomouc), where the market land price is significantly influenced by the distance to the district city. Land reform, however has... |
| Tipo: Article |
Palavras-chave: Land; Market price; Administrative price; Regression model; Region.; Land Economics/Use; GA; IN. |
| Ano: 2011 |
URL: http://purl.umn.edu/120242 |
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| Registros recuperados: 10 | |
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