Data/hora: 01/06/2024 08:31:50

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...	
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: 	--	
Registro original: 	Embrapa Cerrados (CPAC)	
Exemplares: 	CPAC - (13368-1) - ADD - TS - -- - T011/88 - CAS - T011/88 - DIS