Soil Inorganic Nitrogen — 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Concentration of nitrate (plus nitrite) and ammonium (in micrograms N per gram dry soil) in surface soil (0-25 cm) samples, composited by replicate (R1-R6) for all MCSE treatments. Since 2019, also includes samples collected 3-4 times over the growing season from T3 and T4 sampling stations (1-5) and prairie strips (ST).
This datatable is part of the Soil Inorganic Nitrogen on the Main Cropping System Experiment dataset.
This dataset contains the inorganic nitrogen concentration and nitrogen mineralization potential of surface soils (0-25 cm) of the Main Cropping System Experiment (MCSE) at the LTER Main Site (Treatments 1-8, since 1989) and the Mid-successional (TSF) and Forested (TCF, TDF) sites (since 1993). Soil samples are routinely collected once or twice monthly during the growing season, composited by treatment replicate, and analyzed for ammonium and nitrate (plus nitrite); on a near annual basis subsamples are reburied in the field for estimation of nitrogen mineralization potential.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | January 1989 to January 2022 |
| Dataset: | KBS021 |
| Datatable ID: | KBS021-002.109 |
| Core Areas | Inorganic Nutrients,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/ad375cd7fa90c175ab71430a363fd72e |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2024-03-18 |
| Variate | Description | Units |
|---|---|---|
| Year | year in which the date occurs | |
| Campaign | sampling effort with which the data is associated | |
| Date | date of soil sampling | |
| Treatment | main LTER treatment | |
| Replicate | replicate block | |
| station | station id if the samples were not composited | |
| sub plot | The treatment sub_plot. The prairie strips (ST) in T3 and T4 | |
| dry soil g | dry soil weight used in the extraction | |
| solution ml | ml of KCL solution | ml |
| no3 ppm | measured NO3-N concentration in solution (ppm) | mg/L |
| nh4 ppm | measured NH4-N concentration in solution (ppm) | mg/L |
| Nitrate | soil extractable nitrate plus nitrite, as N (average of analytical replicates, screened for outliers and corrected for soil moisture) | μg/g |
| Ammonium | soil extractable ammonium, as N (average of analytical replicates, screened for outliers and corrected for soil moisture) | μg/g |
| top depth cm | top depth of the soil sample as measured from the soil surface | cm |
| bottom depth cm | bottom depth of the soil sample as measured from the soil surface | cm |
Data Excerpt
| year | campaign | date | treatment | replicate | station | sub_plot | dry_soil_g | solution_ml | no3_ppm | nh4_ppm | nitrate | ammonium | top_depth_cm | bottom_depth_cm |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2023 | Soil Inorganic N | 2023-10-11 | T1 | R1 | 8.62 | 101.38 | 0.61 | 0.18 | 7.19 | 2.12 | 0 | 25 | ||
| 2023 | Soil Inorganic N | 2023-10-11 | T1 | R2 | 8.54 | 101.46 | 1.31 | 0.16 | 15.6 | 1.87 | 0 | 25 | ||
| 2023 | Soil Inorganic N | 2023-10-11 | T1 | R3 | 8.44 | 101.56 | 1.46 | 0.16 | 17.62 | 1.89 | 0 | 25 | ||
| 2023 | Soil Inorganic N | 2023-10-11 | T1 | R4 | 8.65 | 101.35 | 1.07 | 0.2 | 12.58 | 2.39 | 0 | 25 | ||
| 2023 | Soil Inorganic N | 2023-10-11 | T1 | R5 | 8.64 | 101.36 | 1.73 | 0.37 | 20.27 | 4.34 | 0 | 25 |