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CARBON AND NITROGEN IN THE LIGHT FRACTION OF A FOREST SOIL: VERTICAL DISTRIBUTION AND SEASONAL PATTERNS
Abstract
We extracted light-fraction material densimetrically in Nal solution (specific gravity 1.65 g/cm3) from root-free soil samples from a forested site in the Oregon Cascade Mountains. We chose extraction at this density because it excluded most of the organomineral particles from the light fraction. Major components identifiable from scanning electron micrographs were dead root fragments, hyphae, charcoal, and pumice–all with adsorbed or entrapped colloidal particles. Total soil carbon (C) and nitrogen (N) at the site averaged 145 and 7.4 megagrams per hectare, respectively, to a depth of 83 centimeters. Light-fraction material accounted for 53 percent of the total C and 45 percent of the total N in the 0− to 3-cm layer; these proportions decreased abruptly in the next layer and then more gradually over the remainder of the 83-cm profile. Amounts of light-fraction material increased by 50 to 100 percent from early spring to summer and then peaked again in the fall. This large seasonal fluctuation indicates that the light fraction provides an important labile reservoir of C and nutrient elements in the forest ecosystem.
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Citations
Cited by
Soil carbon sequestration and land‐use change: processes and potential
Post, W. M., & Kwon, K. C. (2000) · Global Change Biology · doi:10.1046/j.1365-2486.2000.00308.x · Cited by 2,602
Towards a minimum data set to assess soil organic matter quality in agricultural soils
Gregorich, E. G., Carter, M. R., Angers, D. A., Monreal, C. M., & Ellert, B. H. (1994) · Canadian Journal of Soil Science · doi:10.4141/cjss94-051 · Cited by 1,150
Physical Fractionation of Soil and Organic Matter in Primary Particle Size and Density Separates
Christensen, B. T. (1992) · Advances in Soil Science · doi:10.1007/978-1-4612-2930-8_1 · Cited by 1,118
Haynes, R. J. (2005) · Advances in Agronomy · doi:10.1016/s0065-2113(04)85005-3 · Cited by 1,010
Dynamics of soil nitrogen and carbon accumulation for 61 years after agricultural abandonment
Knops, J. M. H., & Tilman, D. (2000) · Ecology · doi:10.1890/0012-9658(2000)081[0088:dosnac]2.0.co;2 · Cited by 595
Metadata
- Authors
- SPYCHER, G., SOLLINS, P., & ROSE, S.
- Venue
- Soil Science
- Published
- 1983-02
- Volume
- 135
- Issue
- 2
- Pages
- 79-87
- ISSN
- 0038-075X (ISSN-L)
- OpenAlex
- W2066074198
- Cited by
- 180
- References
- 0
- FWCI
- 2.03
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: CARBON AND NITROGEN IN THE LIGHT FRACTION OF A FOREST SOIL: VERTICAL DISTRIBUTION AND SEASONAL PATTERNS. https://app.cochat.ai/papers/10.1097/00010694-198302000-00002
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- SPYCHER, G., SOLLINS, P., & ROSE, S. (1983). CARBON AND NITROGEN IN THE LIGHT FRACTION OF A FOREST SOIL: VERTICAL DISTRIBUTION AND SEASONAL PATTERNS. Soil Science. https://doi.org/10.1097/00010694-198302000-00002
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
