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Automated instrumental analysis of carbon and nitrogen in plant and soil samples
Abstract
An automated CHN Analyzer was compared with the Walkley‐Black and Kjeldahl methods for organic carbon (C) and nitrogen (N). Four organic compounds, twenty nine plant materials and five soils were tested. The CHN Analyzer gave C and N values that were not significantly different (P<0.05) to the theoretical weight percents of the organic compounds. The Walkley Black method gave soil C values significantly lower (P<0.05) than those obtained with the CHN Analyzer. The Kjeldahl method gave soil N values significantly lower (P<0.05) than the CHN Analyzer on three of five soils tested. The discrepancies observed between methods appear to be due to different oxidation efficiencies. CHN Analyzer and Kjeldahl N analyses were not significantly different (P<0.05) for the plant materials except where samples contained greater than 0.7% NO3‐N. Potassium nitrate was also added as a spike to a tall fescue sample. Based on recovery of the spiked NO3‐N, the Kjeldahl method was a poor measure of total N for plant materials containing greater than 0.7% NO3‐N. The findings suggest the CHN Analyzer can be used for the rapid, accurate and simultaneous determination of C and N in plant and soil samples.
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Cited by
Teague, W. R., Dowhower, S. L., Baker, S. A., Haile, N., DeLaune, P. B., & Conover, D. M. (2011) · Agriculture, Ecosystems & Environment · doi:10.1016/j.agee.2011.03.009 · Cited by 497
Soil and microbial properties of green infrastructure stormwater management systems
Deeb, M., Groffman, P. M., Joyner, J. L., Lozefski, G., Paltseva, A., Lin, B., Mania, K., Cao, D. L., McLaughlin, J., Muth, T., et al. (2018) · Ecological Engineering · doi:10.1016/j.ecoleng.2018.10.017 · Cited by 57
Temporal Variability of Soil Carbon and Nitrogen in Cotton Production on the Texas High Plains
Burke, J. A., Lewis, K. L., Ritchie, G. L., Moore‐Kucera, J., DeLaune, P. B., & Keeling, J. W. (2019) · Agronomy Journal · doi:10.2134/agronj2019.02.0066 · Cited by 33
Metadata
- Authors
- McGeehan, S. L., & Naylor, D. V.
- Venue
- Communications in Soil Science and Plant Analysis
- Publisher
- Informa UK Limited
- Published
- 1988-03
- Volume
- 19
- Issue
- 4
- Pages
- 493-505
- ISSN
- 0010-3624 (ISSN-L)
- 1532-2416
- OpenAlex
- W2026221068
- Cited by
- 260
- References
- 0
- FWCI
- 0.90
- Type
- journal article
- Language
- en
- Open access
- closed
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- McGeehan, S. L., & Naylor, D. V. (1988). Automated instrumental analysis of carbon and nitrogen in plant and soil samples. Communications in Soil Science and Plant Analysis. https://doi.org/10.1080/00103628809367953
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