Since the 70s, spectroscopic techniques, especially those with infrared radiation (NIRS -Near Infrared Spectroscopy and DRIFTS – Diffuse Reflectance Fourier Transformed Spectroscopy) have been proposed for inorganic soil analysis, but only few methods found routine use in Brazil so far. This fact is probably due to the difficulty in building calibration models based on multivariate tools with real soil samples that have a complex composition that varies geographically and according to the management. The objective of this study was to […]