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| Registros recuperados: 5.289 | |
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| Huynhthanh, S; Temperville, A. |
| The turbulent boundary-layer flow over flat rough beds due to a wave or to combined wave-current interaction is studied using a numerical turbulence closure model of K-L type. Different cases of modelling are discussed and illustrated by numerical examples. The model was run for a wide range of parameters of wave, current, bed roughness and angle of interaction. The curves of dimensionless mean and maximum bed shear stresses obtained present the non-linearity of the wave-current interaction. The parameterization of results is realized in order to facilitate the incorporation of bed shear stresses into coastal morphodynamic models. |
| Tipo: Text |
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| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00097/20867/18485.pdf |
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| Sexton, Richard J.. |
| Helmberger and Hoos' (HH) 1962 paper is a landmark in the economic theory of agricultural cooperatives, Along with the related work by Helmberger (1964), it represented the definitive treatment of marketing cooperative behavior and standard reading for graduate students in agricultural marketing for more than two decades, To understand fully HH's paper, appreciate its many strengths, and also recognize its weaknesses: one must interpret it both in the context of the work on cooperatives that preceded it over the prior two decades and in the framework of developments in general economic theory at that time, In this comment I attempt to provide such a perspective. |
| Tipo: Journal Article |
Palavras-chave: Agribusiness. |
| Ano: 1995 |
URL: http://purl.umn.edu/46178 |
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| Tullio,A. A.. |
| Esta pesquisa procurou identificar a prática pedagógica do professor de Engenharia Agronômica, quais as concepções do processo de aprendizagem e em que medida o conceito teórico do professor é coerente com a sua prática. A prática pedagógica foi aqui delimitada como sendo o cotidiano do professor na execução de seu ensino. O público alvo foram os docentes e discentes do Curso de Engenharia Agronômica da Escola Superior de Agricultura "Luiz de Queiroz"- Campus de Piracicaba da USP. O método expositivo foi predominante, apoiado no uso do quadro negro e retroprojetor. O professor nesse método é a figura central do processo ensino-aprendizagem. A freqüência bastante acentuada em Congressos tem trazido uma atualização constante em termos de conteúdo. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agronomia; Ensino; Pedagogia. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161995000300029 |
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| Lopes,Sidinei José; Storck,Lindolfo. |
| Foram estudados os efeitos de formas de controle de plantas daninhas, uniformidade de distribuição das sementes e adubo, e proteção das plantas jovens aos insetos sobre o erro experimental. As formas de manejo foram organizadas em três experimentos no delineamento inteiramente casualizado, sendo cada repetição das formas de manejo composta por seis linhas de 5,0m de uma cultivar precoce de milho. O controle de plantas daninhas, realizado pelo método químico ou pela capina manual não proporcionou diferença significativa no erro experimental. A estimativa do erro experimental da forma de distribuição de adubo mais uniforme foi menor do que na forma desuniforme. A distribuição de sementes na linha de semeadura, realizada manualmente, e não eqüidistante... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Precisão; Erro experimental; Manejo experimental. |
| Ano: 1995 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781995000100010 |
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| Dardignac, Marie-jose; Prou, Jean. |
| A retrospective study has been carried out on the possible relationships between the spat recruitment of mussels from the Pertuis Breton (France) and some environmental factors at different periods of the year. A significant negative correlation between recruitment and temperature has been found at two periods of the reproductive cycle; the first one coinciding with gametogenesis and the second one taking place just before spawning. But, no relation was noticed with temperature or salinity during the plantonic stage. These results are discussed. An interesting relationship was found between recruitment and "E.T.P.", an index expressing the drying power of air, taking into account temperature, wind, sunshine and moistness. Dessication appears to be... |
| Tipo: Text |
Palavras-chave: Charente Maritime; Pertuis Breton; ETP; Salinité; Température; Estimation biomasse; Mytilus edulis; Moules; Captage. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/1995/publication-3826.PDF |
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| Debertin, David L.; Luzar, E. Jane; Chambers, Orlando D.. |
| This article examines some difficult decisions that agricultural economists must confront in doing research. Over many years, rules and standards have developed in agricultural economics that guide researchers, providing an underlying framework for research methods. This article deals with applying these seldom discussed guidelines to specific research situations confronted by agricultural economists. With this article, we hope to stimulate a dialogue among agricultural economists about the need for additional, appropriate methodological guidelines in agricultural economics research. |
| Tipo: Journal Article |
Palavras-chave: Research and Development/Tech Change/Emerging Technologies. |
| Ano: 1995 |
URL: http://purl.umn.edu/30934 |
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| Skold, Melvin D.; Davis, Robert M.. |
| The incidence of benefits and costs from controlling rangeland grasshoppers on public grazing lands poses problems of economic efficiency and distributional equity. Public grasshopper control programs operate like public disaster assistance. However, grasshopper infestations are an insurable risk. This article proposes a rangeland grasshopper insurance program which reduces the economic inefficiencies and distributional inequities of the existing program. |
| Tipo: Journal Article |
Palavras-chave: Risk and Uncertainty. |
| Ano: 1995 |
URL: http://purl.umn.edu/30765 |
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| Buaha, Gabriel Toichoa; Apland, Jeffrey; Hicks, Dale. |
| This paper reports the results of a regression analysis of the relationship between planting date and corn yield. The study is based on experiments done at Agricultural Experiment Stations in Waseca, Lamberton and Morris, Minnesota. The experiments were conducted with several corn varieties. In addition to the date of planting, the estimated yield response equations include relative maturity as an explanatory variable. Other management practices included in the models are seeding and fertilization rates. Interactions among explanatory variables are estimated, also. |
| Tipo: Working or Discussion Paper |
Palavras-chave: Crop Production/Industries. |
| Ano: 1995 |
URL: http://purl.umn.edu/13872 |
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| Registros recuperados: 5.289 | |
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