Study on the growth curve of the internal cavity of ‘Dwarf green’ coconut fruits
Keywords:
Regression. Least squares. Autoregressive errors. Non-linear.Abstract
The aim of the work was to evaluate the adjustment of the logistic and gompertz model with structure of
first-order autoregressive errors in the study on the ‘Dwarf green’ coconut fruit growth based on longitudinal and crosssectional internal cavity diameter data (DLCI and DTCI). Model adjustments showed positive residual autocorrelation,
according to the Durbin-Watson test and for both variables, DLCI and DTCI, the residue was modeled according to firstorder autoregressive process (AR1). The analysis was performed using the least squares method in the PROC MODEL of
the SAS software and results indicated that for both characteristics under study, the logistic model was the most appropriate
in describing fruit growth and, according to the model, fully developed ‘Dwarf green’ coconut fruits have longitudinal and
cross-sections internal cavity diameter of approximately 7.39 cm and 7.60 cm, respectively.
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