1. Equations for predicting soil organic carbon using loss-on-ignition for North Central U.S. soils
- Author
-
Konen, Michael E., Jacobs, Peter M., Burras, C. Lee, Talaga, Brandi J., and Mason, Joseph A.
- Subjects
Carbon -- Analysis ,Soil chemistry -- Analysis ,Earth sciences - Abstract
Samples of 255 noncalcareous A, Ap, and AB horizons from selected major land resource areas (MLRA) in the north central USA were used to develop equations for predicting organic C content, as determined with a Leco C analyzer, from weight loss-on-ignition (LOI). Organic C concentrations of the samples ranged from 1.09 to 114.6 g [kg.sup.-1]. Within each MLRA, strong linear relationships were observed between LOI and organic C measured by the Leco instrument, with [r.sup.2] ranging from 0.94 to 0.98. Predictive equations developed by least-squares regression were significantly different for individual MLRA's. Loss-on-ignition is a rapid, inexpensive, and accurate for estimating organic C concentration in soils of the north central USA. We recommend that unique predictive equations be developed for individual soil-geographic regions.
- Published
- 2002