datsoilspc: Geeves dataset
In AlexandreWadoux/soilspec: The soilspec R package

The Geeves dataset (Geeves et al., 1994) is a soil survey containing 391 soil samples collected in the wheatbelt of southern New South Wales and northern Victoria, Australia. The reflectance infrared spectra was obtained in the range 350-2500 nm at 1 nm resolution using an AgriSpec instrument with a contact probe (Analytical Spectral Devices, Boulder, Colorado, USA). A spectralon (Labsphere Inc., North Sutton, N.H., USA) was used as reflectance standard. Each spectrum in the dataset is a wavelength-average of 40 scans.

Total carbon (TC), clay, silt and sand were analysed in the laboratory using standard methods. TC was analysed by the dry-combustion method and is reported in g 100 g-1. The values of the TC range from 0.6 to 12.74 g 100 g-1. The TC does not contain inorganic carbon. The hydrometer method was used for the particle size distribution and their relative quantity was converted to percent. Clay content varies from 5 to 74%, silt content from 2 to 54% and sand content from 14 to 91%.

clay: Clay content (%).
silt: Silt content (%).
sand: Sand content (%).
TotalCarbon: Total carbon g 100 g-1.
spc: Table of size 391 by 2191 with vis-NIR spectra. Each row is a spectra.

1	data('datsoilspc')

Geeves G.W., Cresswell H.P., Murphy B.W., Gessler P.I., Chartres C.J., Little I.P., Bowman G.M. (1994) Physical, chemical and morphological properties of soils in the wheat-belt of southern NSW and northern Victoria. NSW Department of Conservation; Land Management/CSIRO Division of Soils Occasional Report, CSIRO, Australia