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| Santos Filho,Joel Carneiro dos; Hostiou,Nathalie; Damasceno,Julio César; Dedieu,Benoît. |
| The objective of this study was to characterize and to analyze the room for manoeuvre in time in dairy production systems (DPS). Two interviews were conducted in twenty DPS in the Northern region of Paraná, Brazil, with the following objectives: to know the management and practices involving the herd, the land area and the commercialization; and to qualify and evaluate the work organization. In order to build the variables, the repertory grid method was used, and for the typology, the graphic methodology of Bertin adapted to small samples was used. The results showed that the room for manoeuvre in time of the DPS, quantified in hours available per year, varied between the farmers and was related to routine work and seasonal work durations, as well as the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Agriculture work; Dairy activity; Herd management; Labor; Production system; Work organization. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012001200010 |
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| Ojeda-Rojas,Oscar Alejandro; Gonella-Diaza,Angela Maria; Sá Filho,Manoel Francisco de; Nunes,Rubens; Gameiro,Augusto Hauber. |
| ABSTRACT The objective of this study was to develop a simulation model to analyse the technical, economic, and financial performance of using different reproductive strategies in dairy herds. Strategies simulated were: artificial insemination (AI) using conventional semen after oestrus detection (AIC), AI using sex-sorted semen after oestrus detection (AIS), timed artificial insemination (TAI) using conventional semen (TAIC), and TAI using sex-sorted semen (TAIS). The total time horizon analysed corresponded to 25 years, divided into 425 periods of 21 days. The model simulates the biological cycle that takes place within the bovine herd, and uses input information (productive parameters, investments, and reproductive program) to calculate output... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Herd management; Internal rate of return; Net present value; Payback; Reproduction performance. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982018000100710 |
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