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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
17/12/1996 |
Data da última atualização: |
17/12/1996 |
Autoria: |
CASTRO, A. M. G. de. |
Título: |
A systems approach to determining priorities for natural rubber research in Brasil. |
Ano de publicação: |
1988 |
Fonte/Imprenta: |
Reading: University of Reading, 1988. |
Páginas: |
290p. |
Idioma: |
Inglês |
Notas: |
PhD. Thesis. |
Conteúdo: |
A systems approach was demonstrated to determine priorities and resource allocation for agricultural research in Brazil with the objective being to alleviate the subjectivity of the process which often has led to internal conflict and loss of efficiency in the traditional approach. The research program in natural rubber, an important commodity in Brazil, was chosen to represent the single commodity research in that country. A review of the Brazilian rubber farmers and problems faced by them, was given together with a description of the natural rubber research organization. Performance was assessed at the two primary rubber producing centers of Brazil, Manaus and S. Paulo. A preliminary crop growth model was built in order to simulate rubber growth and produc-tion. The model consists of a carbon & water flow can simulate the modrubber growth and yield on daily basis. Two submodels were developed to determine the nutrient uptake and yield losses resulting from foliar diseases. The model was constructed using data from Brazil but data from other producing countries was also included when information was not available. Only a qualitative model evaluation was attempted at this stage of the model contruction. The output of the biological model was fed into a specially built budgetary model, which was used to assess the relative importance of alternative research, measured by its impact on rubber yield and profitability. Alternative research was simulated through sensitivity analysis and by grouping parameters... MenosA systems approach was demonstrated to determine priorities and resource allocation for agricultural research in Brazil with the objective being to alleviate the subjectivity of the process which often has led to internal conflict and loss of efficiency in the traditional approach. The research program in natural rubber, an important commodity in Brazil, was chosen to represent the single commodity research in that country. A review of the Brazilian rubber farmers and problems faced by them, was given together with a description of the natural rubber research organization. Performance was assessed at the two primary rubber producing centers of Brazil, Manaus and S. Paulo. A preliminary crop growth model was built in order to simulate rubber growth and produc-tion. The model consists of a carbon & water flow can simulate the modrubber growth and yield on daily basis. Two submodels were developed to determine the nutrient uptake and yield losses resulting from foliar diseases. The model was constructed using data from Brazil but data from other producing countries was also included when information was not available. Only a qualitative model evaluation was attempted at this stage of the model contruction. The output of the biological model was fed into a specially built budgetary model, which was used to assess the relative importance of alternative research, measured by its impact on rubber yield and profitability. Alternative research was simulated through sensitivity analys... Mostrar Tudo |
Palavras-Chave: |
Brasil; Management; Modelo; Production; Resource allocations; Rsearch; Sistema; Systems. |
Thesagro: |
Administração de Pesquisa; Agricultura; Análise; Borracha; Crescimento; Pesquisa; Produção; Simulação; Sistema de Produção. |
Thesaurus Nal: |
agriculture; Brazil; planning; rubber; simulation models; systems analysis. |
Categoria do assunto: |
-- |
Marc: |
LEADER 02553nam a2200409 a 4500 001 1556590 005 1996-12-17 008 1988 bl uuuu m 00u1 u #d 100 1 $aCASTRO, A. M. G. de 245 $aA systems approach to determining priorities for natural rubber research in Brasil. 260 $aReading: University of Reading$c1988 300 $a290p. 500 $aPhD. Thesis. 520 $aA systems approach was demonstrated to determine priorities and resource allocation for agricultural research in Brazil with the objective being to alleviate the subjectivity of the process which often has led to internal conflict and loss of efficiency in the traditional approach. The research program in natural rubber, an important commodity in Brazil, was chosen to represent the single commodity research in that country. A review of the Brazilian rubber farmers and problems faced by them, was given together with a description of the natural rubber research organization. Performance was assessed at the two primary rubber producing centers of Brazil, Manaus and S. Paulo. A preliminary crop growth model was built in order to simulate rubber growth and produc-tion. The model consists of a carbon & water flow can simulate the modrubber growth and yield on daily basis. Two submodels were developed to determine the nutrient uptake and yield losses resulting from foliar diseases. The model was constructed using data from Brazil but data from other producing countries was also included when information was not available. Only a qualitative model evaluation was attempted at this stage of the model contruction. The output of the biological model was fed into a specially built budgetary model, which was used to assess the relative importance of alternative research, measured by its impact on rubber yield and profitability. Alternative research was simulated through sensitivity analysis and by grouping parameters... 650 $aagriculture 650 $aBrazil 650 $aplanning 650 $arubber 650 $asimulation models 650 $asystems analysis 650 $aAdministração de Pesquisa 650 $aAgricultura 650 $aAnálise 650 $aBorracha 650 $aCrescimento 650 $aPesquisa 650 $aProdução 650 $aSimulação 650 $aSistema de Produção 653 $aBrasil 653 $aManagement 653 $aModelo 653 $aProduction 653 $aResource allocations 653 $aRsearch 653 $aSistema 653 $aSystems
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163. | | REZENDE, A. C. B.; CASTRO, M. FERNANDA P. M. de; PORTO, E.; UCHIMA, C. A.; BENATO, E.; PENTEADO, A. L. Occurrence of Salmonella spp. in persimmon fruit (Diospyrus kaki) and growth of Salmonella enteritidis on the peel and in the pulp of this fruit. Food Control, Maryland Heights, v. 20, n. 11, p. 1025-1029, nov. 2009.Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
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178. | | BERGAMASCHI, M. A. C. M.; VICENTE, W. R. R.; BARBOSA, R. T.; MACHADO, R.; MARQUES, J. A.; FREITAS, A. R. de. Ultrasound assessment of fetal development in Nelore cows. Archivos Zootecnia, v.53, n.204, p.1-4, 2004.Tipo: Artigo em Periódico Indexado | Circulação/Nível: Internacional - B |
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