Soil Total Carbon and Nitrogen - Surface — Main Cropping System Experiment (MCSE)
Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Total carbon and total nitrogen of surface soils from the LTER Main Site and the Successional and Forested sites. Total C and N are analyzed on one date annually of the baseline soil samplings. Samples are combusted and measured on a CHN analyzer. These samples are taken from the 0-25 depth.
This datatable is part of the Soil Total Carbon and Total Nitrogen on the Main Cropping System Experiment dataset. Soil carbon and nitrogen are presented as % elemental carbon and nitrogen (g C or N / 100 g soil) for the sampling depth of the specific sampling date unless indicated otherwise. Samples were taken with either a 2.5 cm diameter soil corer (sampling by soil depth) or a 10 cm diameter Giddings probe (sampling by soil profile). See Baseline Soil Sampling protocol for general sampling information. For specific sampling details for a particular date, see Soil Sampling Field Log. Soil samples are sieved to 4mm and composited by plot. Soil % elemental carbon and nitrogen values are determined by sample combustion and subsequent TCD gas chromatography, using a Carlo Erba automated CHN analyzer as described in the sampling protocol.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | June 1989 to April 2001 |
| Dataset: | KBS024 |
| Datatable ID: | KBS024-001.26 |
| Core Areas | Organic Matter,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/751478bd34fc1d05e22113537c20d13d |
| Personnel: |
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| Last Updated | 2021-09-30 |
| Variate | Description | Units |
|---|---|---|
| sample date | date of sampling | |
| treatment | treatment | |
| replicate | replicate block | |
| n | number of analytical sample replicates | number |
| mean c | mean percent carbon | % |
| sd c | standard deviation percent carbon | % |
| mean n | mean percent nitrogen | % |
| mean cn | standard deviation percent nitrogen | % |
| sd n | undescribed | dimensionless |
| sd cn | ratio: mean C divided by mean N | g/g |
| year | year in which the date occurs |
Data Excerpt
| sample_date | treatment | replicate | n | mean_c | sd_c | mean_n | sd_n | mean_cn | sd_cn | year |
|---|---|---|---|---|---|---|---|---|---|---|
| 2001-04-04 | 1 | 3 | 3 | 1.09 | 0.05 | 0.12 | 0.0 | 8.99 | 2001.0 | |
| 2001-04-04 | 1 | 4 | 3 | 0.82 | 0.03 | 0.1 | 0.0 | 8.45 | 2001.0 | |
| 2001-04-04 | 1 | 1 | 3 | 0.65 | 0.06 | 0.08 | 0.0 | 7.85 | 2001.0 | |
| 2001-04-04 | 1 | 2 | 3 | 0.83 | 0.03 | 0.1 | 0.0 | 8.52 | 2001.0 | |
| 2001-04-04 | 1 | 5 | 3 | 0.65 | 0.01 | 0.08 | 0.0 | 7.98 | 2001.0 |