@article{articleeba8258e,
title   = {Spatial Modeling of a Soil Fertility Index using Visible-Near-Infrared Spectra and Terrain Attributes},
author = {Viscarra Rossel, R. A and Rizzo, Rodnei and Dematte, Jose Alexandre Melo and Behrens, T},
year = {2010},
doi = {10.2136/SSSAJ2009.0130},
journal   = {Soil Science Society of America Journal}
}