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Efficiency modeling, an important factor in the development of sheep and goat production in a semiarid region. Author(s): ABREU, U. G. P. de; LIMA, L. D. de; ALBUQUERQUE, F. H. M. A. R. de; SOUZA, J. D. F. de The paper aims to use the Data Envelopment Analysis (DEA) approach to evaluate the performance of sheep and goat production systems in the semi-arid region in Brazil. By applying a questionnaire with... ... Repository: BDPA Publication year: 2022
Modelling conditional measures of efficiency to assess the influence of covariates on agricultural production in Brazil. Author(s): SOUZA, G. da S. e; GOMES, E. G. ABSTRACT: Brazilian agriculture is productive, efficient, and profitable for a few farmers. However, due to the restricted access to technology, the major part of the rural producers are marginalized... ... Repository: BDPA Publication year: 2022
Probabilistic measures of efficiency and the influence of contextual variables in nonparametric production models: an application to agricultural research in Brazil. Author(s): SOUZA, G. da S. e; GOMES, E. G. In a research institution it is important to identify which management practices have influence on production efficiency. In this paper we assess the statistical significance of contextual variables t... ... Repository: BDPA Publication year: 2010
Probabilistic measures of efficiency and the influence of contextual variables in nonparametric production models: an application to agricultural research evaluation in Brazil. Author(s): SOUZA, G. da S. e; GOMES, E. G.; STAUB, R. B. Repository: BDPA Publication year: 2009
Rice yield estimation based on weather conditions and on technological level of production systems in Brazil. Author(s): MONTEIRO, J. E. B. de A.; AZEVEDO, L. da C.; ASSAD, E. D.; SENTELHAS, P. C. The objective of this work was to evaluate an estimation system for rice yield in Brazil, based on simple agrometeorological models and on the technological level of production systems. This estimatio... ... Repository: BDPA Publication year: 2013
Temporal variability of the water requirement and productivity for irrigated maize crop. Author(s): ANDRADE, C. de L. T. de; AMARAL, T. A.; ALVES, M. E. B.; SILVA, D. F. There is a worldwide effort to produce food with less water consumption, due to scarcity trend of this resource. The study aimed to evaluate water productivity, simulated by the decision support model... ... Repository: BDPA Publication year: 2011
Economic and socio-environmental performance assessment of beef cattle production systems: a data envelopment analysis (DEA) approach with weight restrictions. Author(s): GOMES, E. G.; ABREU, U. G. P. de; MELLO, J. C. C. B. S. de; CARVALHO, T. B. de; ZEN, S. de This study evaluated the performance of 21 beef cattle modal production systems that conduct only the raising phase. These production systems were developed in 21 municipalities in seven Brazilian sta... ... Repository: BDPA Publication year: 2015
Effects of education and investment in research in agricultural production in Brazil. Author(s): GOMES, E. G.; SOUZA, G. da S. e; GAZZOLA, R.; AVILA, A. F. D. We use census data (1996 and 2006) to model the agricultural production at state level in Brazil. Cost efficiency measurements are computed using data envelopment analysis and the response is assessed... ... Repository: BDPA Publication year: 2010
Effects of using phenotypic means and genotypic values in GGE biplot analyses on genotype by environment studies on tropical maize (Zea mays). Author(s): GRANATO, I. S. C.; FRITSCHE-NETO, R.; RESENDE, M. D. V. de; SILVA, F. F. The objective of this study was to examine the effects of the type and intensity of nutritional stress, and of the statistical treatment of the data, on the genotype x environment (G x E) interaction... ... Repository: BDPA Publication year: 2016
Modeling for fertilization and liming for sugarcane in low fertility soils. Author(s): FREIRE, F. J.; SILVA, F. C. da; VENEGAS, V. H. A. Currently fertilizers recommendation for the sugar cane culture in Brazil are based on growth curves, obtained from the relationship between fertilizer rates and yield increment. Predictive recommenda... ... Repository: BDPA Publication year: 2019

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