Abstract
The boll cutting technique allows cotton producers to gauge the maturity of cotton bolls to help in their decision-making in the final stages of management of their crop leading up to harvest. The aim of this work was to assess the feasibility of using portable near infrared technology as a non-destructive rapid replacement for the manual boll cutting technique. Near infrared spectra (702–1100 nm) were collected from bolls using a Felix F-750 Produce Quality Meter. Spectra were successfully calibrated with two levels of boll maturity (immature and mature) using a partial least squares model for a population of 201 bolls. Independent validation of the model using separate boll populations predicted boll maturity correctly with an average accuracy of 96%. Calibrations that used spectra collected from bolls under field conditions performed similarly to calibrations that used spectra collected from the same bolls under controlled laboratory conditions. There was no preferred spectral sampling location on the bolls that resulted in better calibration performance. Calibration performance did not improve when spectral mathematical pre-treatments were used.
© 2020 The Author(s)
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