Simultaneous Determination of N, Cl, P and K in Tobacco by FT-NIR Spectrometry

The calibration models for predicting the contents of N, Cl, P and K in tobacco root, stalk and leaves with NIR spectrography were established by processing the data collected from FT-NIR spectra of 1210 representative samples during various growing stages with PLS method.The statistical results showed that there was no significant difference between the predicted and found values when the level of significance was over 5%.