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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use
Periodically, sub-samples from a soil sampling campaign are reburied in porous bags. After about 21 days, they are recovered and analyzed for N content. This table represents change in soil nitrate (plus nitrite) and ammonium over the incubation period.
This datatable is part of the Soil Inorganic Nitrogen on the Main Cropping System Experiment dataset. Measurement of soil inorganic nitrogen began in 1989 for all treatments on the LTER Main Site and 1993 on the Successional and Forest sites. Ammonium and nitrate are analyzed twice monthly or monthly during the growing season on baseline soil samplings. Additional datasets from the Baseline Soil Samplings include soil moisture, total N and total C.
Note
| Experiment: | Main Cropping System Experiment (MCSE) |
| Data available from: | January 1989 to June 2018 |
| Dataset: | KBS021 |
| Datatable ID: | KBS021-004.84 |
| Core Areas | Inorganic Nutrients,Disturbance |
| Repository link: | http://doi.org/10.6073/pasta/ad375cd7fa90c175ab71430a363fd72e |
| Related Tables: | |
| Personnel: |
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| Last Updated | 2020-07-10 |
| 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 | |
| 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. | micrograms/gram/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. | micrograms/gram/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. | micrograms/gram/day |
Data Excerpt
| year | campaign | treatment | description | replicate | t0_date | t21_date | netnitrification | netmineralization | netammonification |
|---|---|---|---|---|---|---|---|---|---|
| 2021 | N mineralization | T3 | Reduced Input Management | R3 | 2021-07-01 | 2021-07-22 | 0.258318 | 0.26438252 | 0.00606452 |
| 2021 | N mineralization | T3 | Reduced Input Management | R4 | 2021-07-01 | 2021-07-22 | -0.0418762 | -0.2035082 | -0.161632 |
| 2021 | N mineralization | T3 | Reduced Input Management | R1 | 2021-07-01 | 2021-07-22 | -0.0452976 | -0.03690097 | 0.00839663 |
| 2021 | N mineralization | T3 | Reduced Input Management | R2 | 2021-07-01 | 2021-07-22 | -0.0915802 | -0.0221726 | 0.0694076 |
| 2021 | N mineralization | T3 | Reduced Input Management | R5 | 2021-07-01 | 2021-07-22 | 0.849868 | 0.595669 | -0.254199 |