Freschet G. T., Barthès Bernard, Brunet Didier, Hien E., Masse Dominique. (2011). Use of near infrared reflectance spectroscopy (nirs) for predicting soil fertility and historical management. Communications in Soil Science and Plant Analysis, 42 (14), 1692-1705. ISSN 0010-3624.
Titre du document
Use of near infrared reflectance spectroscopy (nirs) for predicting soil fertility and historical management
Freschet G. T., Barthès Bernard, Brunet Didier, Hien E., Masse Dominique
Source
Communications in Soil Science and Plant Analysis, 2011,
42 (14), 1692-1705 ISSN 0010-3624
This study tests the potential of near infrared reflectance spectroscopy (NIRS) for predicting soil fertility and management history from topsoil (0-10 cm deep) spectra. Soil fertility was assessed by measuring the growth of a test plant, and soil management history was determined through inquiries with farmers. Moreover, NIRS predictive value was compared with that of a group of topsoil parameters: total carbon and nitrogen, nitrate, potential respiration and denitrification, and microbial biomass. Modelling used partial and modified partial least square regressions to ensure comparisons between predictions by NIRS versus by soil parameters. Soil fertility and management history were well predicted by NIRS (Q(2) = 0.78 and R-2 = 0.89 both; Q(2) and R-2 are cross-validation and calibration coefficients of determination, respectively), as were the soil parameters (Q(2) = 0.79-0.92 and R-2 = 0.86-0.98). Soil fertility and management history were more accurately predicted by NIRS than by the set of soil parameters.
