TY - JOUR
T1 - Characterizing soils via portable x-ray fluorescence spectrometer
T2 - 2. Spodic and Albic horizons
AU - Weindorf, David C.
AU - Zhu, Yuanda
AU - McDaniel, Paul
AU - Valerio, Mitchell
AU - Lynn, Lorene
AU - Michaelson, Gary
AU - Clark, Mark
AU - Ping, Chien Lu
PY - 2012/11
Y1 - 2012/11
N2 - Differentiation of horizons in soils formed in volcanic ash can be problematic as recent ash deposits often have the same morphological appearance as eluvial albic horizons. Furthermore, differentiation of spodic horizons can be difficult as multiple horizons can appear homogeneous. A portable x-ray fluorescence (PXRF) spectrometer was utilized to scan volcanic ash-derived Spodosols, Andisols, and Inceptisols in northern Idaho and southern Alaska. Distinct patterns of elemental concentrations were identified in soil profiles. These data can be used to quantitatively differentiate seemingly nondescript horizons. Organic carbon variability within soil profiles was found to significantly correlate to elemental concentrations as evidenced by strong regression r 2 and low root mean squared errors (RMSEs). Specifically, Fe/Zr ratios proved useful for documenting spodic horizons in the studied profiles, and showed some potential for differentiating volcanic ash from true E horizons. In areas of frequent saturation or inundation, the PXRF also demonstrated the ability to distinguish depleted soil matrix materials from reduced Fe. Summarily, the PXRF proved to be a useful instrument for rapid, on-site analysis of volcanic ash soils.
AB - Differentiation of horizons in soils formed in volcanic ash can be problematic as recent ash deposits often have the same morphological appearance as eluvial albic horizons. Furthermore, differentiation of spodic horizons can be difficult as multiple horizons can appear homogeneous. A portable x-ray fluorescence (PXRF) spectrometer was utilized to scan volcanic ash-derived Spodosols, Andisols, and Inceptisols in northern Idaho and southern Alaska. Distinct patterns of elemental concentrations were identified in soil profiles. These data can be used to quantitatively differentiate seemingly nondescript horizons. Organic carbon variability within soil profiles was found to significantly correlate to elemental concentrations as evidenced by strong regression r 2 and low root mean squared errors (RMSEs). Specifically, Fe/Zr ratios proved useful for documenting spodic horizons in the studied profiles, and showed some potential for differentiating volcanic ash from true E horizons. In areas of frequent saturation or inundation, the PXRF also demonstrated the ability to distinguish depleted soil matrix materials from reduced Fe. Summarily, the PXRF proved to be a useful instrument for rapid, on-site analysis of volcanic ash soils.
KW - Iron
KW - Portable x-ray fluorescence spectrometry
KW - Spodosols
KW - Volcanic ash
UR - http://www.scopus.com/inward/record.url?scp=84865052319&partnerID=8YFLogxK
U2 - 10.1016/j.geoderma.2012.06.034
DO - 10.1016/j.geoderma.2012.06.034
M3 - Article
AN - SCOPUS:84865052319
SN - 0016-7061
VL - 189-190
SP - 268
EP - 277
JO - Geoderma
JF - Geoderma
ER -