Este trabalho teve como objetivo avaliar o desempenho do Método de Pontos Interiores (MPI), tipo trajetória central, na maximização de funções-objetivos associadas à produção e receita agrícola com limitações de água e nitrogênio. Para isso, foi desenvolvido um procedimento iterativo buscando maximizar a produção e renda separadamente, em função da água e do nitrogênio aplicado numa caixa bidimensional de restrições, a partir de funções de produtividade para as culturas do melão e melancia. Após caracterização e implementação do modelo matemático, foram gerados resultados numéricos para diferentes cenários agrícolas. Concluiu-se que a metodologia de pontos interiores (MPI), utilizada neste estudo, foi capaz de maximizar a produtividade e receita, resultando na obtenção de valores confiáveis quando comparada com a metodologia Simplex. UNITERMOS: Metodologia de Pontos Interiores, programação não linear, otimização DELGADO, A. R. S.; DUARTE, W. S.; LIMA, V. N.; CARVALHO, D. F. de. MATHEMATICAL MODELLING FOR OPTIMATIZATION OF IN COME OF MELON AND WATERMELON IN WATER DEPTHS AND NITROGEN RATES DOSES FUNCTIONS 2 ABSTRACT The objective of this work was to evaluate the Interior Point Method (central path) in the maximization of objective functions associated to production and agricultural income with water and nitrogen constraints. Thus, a computational procedure to maximize the production in relation to water and nitrogen applied to the melon and watermelon cultivation was developed in a bi-dimensional box of constraints. The model was characterized and numerical results were presented for different agricultural scenes. It was concluded that the interior point method (IPM) used in this study was capable to maximize the productivity and revenue, obtaining reliable values when compared with Simplex method. KEYWORDS: Interior Point Method, nonlinear programming, optimization
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