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The present study evaluates the economic viability of four different models of beef cattle production in the rio Vermelho hydrographic basin. The study focuses on the traditional extensive ranching system, which was compared to three intensive systems, one based on low levels of concentrated supplementation, a second with low levels of concentrated supplementation and confinement for fattening and an intensive grazing system, with supplementation during the dry and rainy seasons. The investments were estimated for the different levels of technical specifications of each system. The net present values and internal return rate were used for the assessment of the economic viability of the project, considering the minimum rate of attractiveness, equivalent to the inflation-adjusted savings interest rate (6.17%). The continuity of the sector was evaluated based on the gross and net margins, and profitability rates, where the system is already installed. All four systems had gross and net margins and profitability consistent with their economic sustainability over both the short and long terms. However, only two systems (reduced consumption of concentrated supplements and the intensive grazing system) were economically viable as start-ups. Key-words: economic viability, beef cattle ranching, production costs. Resumo: O presente trabalho tem por objetivo analisar a viabilidade econômica de implantação de quatro modelos de sistema de produção de bovinos de corte. Foram considerados os sistemas: média da bacia hidrográfica do rio Vermelho, sistema de baixo consumo de suplemento concentrado, sistema de baixo consumo de suplemento com terminação em confinamento e sistema intensivo a pasto, com suplementação nos períodos de águas e de seca. Investimentos foram estimados conforme o nível de tecnificação de cada sistema. A análise de viabilidade econômica do projeto foi realizada com uso do valor presente líquido e a taxa interna de retorno, considerando-se a taxa mínima de atratividade equivalente ao juro real da poupança (6,17%). Por meio da margem bruta, margem líquida e taxa de Data de submissão: 29 de abril de 2016. Data de aceite: 29 de outubro de 2017. 1. We would like to thank Fausto R. Aguiar, Nilton R. Reis, Valdeci G. Silva, Breno Vaz, Elmon P. Oliveira, Fausto Miziara and Laerte G. Ferreira, who provided important contributions to the discussion on production systems. We are also grateful to Augusto A. Castro Junior and Stephen F. Ferrari for additional comments and improvements to this paper. 2. Universidade Federal de Goiás. Goiânia, Goiás, Brasil. 3. Pontifícia Universidade Católica de Goiás. Goiânia, Goiás, Brasil. E-mail: elisreg@gmail.com 4. Universidade Federal de Goiás. Goiânia, Goiás, Brasil. E-mail: victorzootecnista@hotmail.com

Productive and Economic Viability of Raising Beef Cattle in the Savanna of the Brazilian State of Goiás