@article{fdi:010042712,
  title = {{C}omparison between predictions of {G} and {N} contents in tropical soils using a {V}is-{NIR} spectrometer including a fibre-optic probe versus an {NIR} spectrometer including a sample transport module},
  author = {{B}runet, {D}idier and {B}ernoux, {M}artial and {B}arthes, {B}ernard},
  editor = {},
  language = {{ENG}},
  abstract = {{I}ncreasing attention is being paid to near-infrared reflectance ({NIR}) spectroscopy for the rapid and cost-effective determination of soil carbon ({C}) and nitrogen ({N}) contents. {T}he objective of the present paper was to compare the performances of two spectrometers: one covered the visible and {NIR} ranges ({V}is-{NIR}, 350-2500 nm) and included a fibre-optic probe and the other covered the {NIR} range only (1100-2500 nm) and included a sample transport module. {T}he comparison was carried out on two sets of clayey (n = 97) and sandy (n = 72) soil samples from tropical {A}frica and {A}merica. {O}n the whole, both technologies provided good calibrations ({R}-2>0.74) and predictions ({R}-2>0.62) of soil {C} and {N} contents. {T}he most accurate calibrations were achieved with the {NIR} spectrometer ({R}-2>0.86), which also yielded the most accurate predictions for the sandy soils ({R}-2 = 0.90 and standard error of prediction < 15% of the mean). {F}or the clayey soils, the best predictions of both spectrometers were similar ({R}-2 >= 0.68 and standard error of prediction <20% of the mean). {U}sing first or second derivatives of spectra did not affect calibration but had an impact on validation.},
  keywords = {},
  booktitle = {},
  journal = {{B}iosystems {E}ngineering},
  volume = {100},
  numero = {3},
  pages = {448--452},
  ISSN = {1537-5110},
  year = {2008},
  DOI = {10.1016/j.biosystemseng.2008.04.008},
  URL = {https://www.documentation.ird.fr/hor/fdi:010042712},
}