Soil Nitrogen Mineralization — 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Net nitrogen mineralization, nitrification and ammonification potentials of surface soils (0-25 cm) for all MCSE treatments, as determined by changes in nitrate and ammonium content over short term (~21 days) field incubations of subsamples from composite soil samples. Since 2019, also includes samples collected 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 2021 |
| Dataset: | KBS021 |
| Datatable ID: | KBS021-004.109 |
| 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 initial sample date occurs | |
| Campaign | effort with which the sample is associated | |
| Treatment | treatment | |
| Description | Treatment description | |
| Replicate | replicate block | |
| station | sample station if sampled by station | |
| sub plot | sub plot (ie main plot as indicated by an empty string or the prairie strip as indicated by 'ST') | |
| T0 Date | date on which the soil sample was initially analyzed | |
| T21 Date | date on which the buried sample was retrieved | |
| NetNitrification | difference in nitrate levels (final minus the initial nitrate), divided by duration of the incubation. A positive sign means that there is more nitrate at the end of the incubation than at the beginning. | μg/g/day |
| NetMineralization | difference in nitrate + ammonium levels (final - initial nitrate + ammonium), divided by duration of the incubation. A positive sign means that there is more nitrogen at the end of the incubation than the beginning. | μg/g/day |
| NetAmmonification | the difference in ammonium levels (final - initial) devided by the duration of the incubation. A positive value means that there was more ammonium at the end of the incubation than at the beginning. | μg/g/day |
Data Excerpt
| year | campaign | treatment | description | replicate | station | sub_plot | t0_date | t21_date | netnitrification | netmineralization | netammonification |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2022 | N mineralization | T1 | Conventional Management | R3 | 2022-07-14 | 2022-08-11 | 0.348371 | 0.243666 | -0.104705 | ||
| 2022 | N mineralization | T1 | Conventional Management | R4 | 2022-07-14 | 2022-08-11 | 0.174945 | 0.1480757 | -0.0268693 | ||
| 2022 | N mineralization | T1 | Conventional Management | R1 | 2022-07-14 | 2022-08-11 | 0.111453 | 0.0810635 | -0.0303895 | ||
| 2022 | N mineralization | T1 | Conventional Management | R2 | 2022-07-14 | 2022-08-11 | 0.167951 | 0.1277001 | -0.0402509 | ||
| 2022 | N mineralization | T1 | Conventional Management | R5 | 2022-07-14 | 2022-08-11 | 0.136557 | 0.1047914 | -0.0317656 |