Equations for Predicting Soil Organic Carbon Using Loss‐on‐Ignition for North Central U.S. Soils

Soil Science Society of America Journal - Tập 66 Số 6 - Trang 1878-1881 - 2002
Michael E. Konen1, Peter Martin Jacobs2, C. Lee Burras3, Brandi J. Talaga1, Joseph A. Mason4
1Dep. of Geography Northern Illinois Univ. DeKalb IL 60115
2Dep. of Geography and Geology Univ. of Wisconsin Whitewater WI 53190
3Dep. of Agronomy Iowa State Univ. Ames IA 50011
4Conservation and Survey Div. and Dep. of Geosciences Univ. of Nebraska Lincoln NE 68588

Tóm tắt

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−1 Within each MLRA, strong linear relationships were observed between LOI and organic C measured by the Leco instrument, with r2 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 method 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.

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Soil Science Society of America Journal

Tập 66 Số 6

1878-1881

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