4 documents found, page 1 of 1
Modeling of the diameter of the canopy pruned coffee tree cultivated in differe...
Pereira, Adriele Aparecida; de Morais, Augusto Ramalho; Scalco, Myriane Stella; Fernandes, Tales JesusThe objective of authors was to describe and analyze, by means of the Brody and Logistics models, the evolution of the diameter of the canopy of coffee plants, cultivated in two planting densities and submitted to five irrigation regimes, after pruning. The analyzed data are originated from an experiment performed at the Universidade Federal de Lavras, in Lavras, Minas Gerais. After pruning the crop, the data w...
Parameterization effects in nonlinear models to describe growth curves
Fernandes, Tales Jesus; Muniz, Joel Augusto; Pereira, Adriele Aparecida; Muniz, Fabiana Rezende; Muianga, Carlos AlbertoVarious parameterizations of nonlinear models are common in the literature.In addition to complicating the understanding of these models, these parameterizations affect the nonlinearity measures and subsequently the inferences about the parameters. Bates and Watts (1980) quantified model nonlinearity using the geometric concept of curvature. Here we aimed to evaluate the three most common parameterizations of t...
Selection of nonlinear models for the description of the growth curves of coffe...
Fernandes, Tales Jesus; Pereira, Adriele Aparecida; Muniz, Joel Augusto; Savian, Taciana VillelaCoffee is one of the most important products of Brazilian agriculture, therefore studies aimed at improving the final quality of the coffee cherry has increasingly been the target of research. To know the growth curves of fruits allows a best crop management, as well as identify times of higher demand for nutrients. The aim of this work was to compare the nonlinear regression models Logistic e Gompertz in the d...
Description vegetative growth of coffee tree farming Rubi MG 1192 regression mo...
Pereira, Adriele Aparecida; de Morais, Augusto Ramalho; Scalco, Myriane Stella; Fernandes, Tales JesusAgricultural products constitute one of the bases of the Brazilian economy, and between them stands out the coffee. The objective of this study was to evaluate, over time, the vegetative growth of coffee plants, Rubi MG 1192 grown in densities 3333 and 10000 plants ha-1 and irrigation regimes control, 20 kPa and 60 kPa. The data are from an experiment carried out in Lavras, Brazil, using randomized blocks desig...