Soil Nitrogen Mineralization

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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 January 2015
Dataset: KBS021
Datatable ID: KBS021-004.47
Core Areas Inorganic Nutrients,Disturbance
Related Tables:
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Last Updated 2018-12-18
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
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
2015 N mineralization T1 Conventional Management R4 2015-07-07 2015-07-28 0.114845 0.1044301 -0.0104149
2015 N mineralization T1 Conventional Management R5 2015-07-07 2015-07-28 0.187761 0.1671907 -0.0205703
2015 N mineralization T1 Conventional Management R1 2015-07-07 2015-07-28 0.197455 0.1787614 -0.0186936
2015 N mineralization T1 Conventional Management R2 2015-07-07 2015-07-28 0.0385044 0.0214970 -0.0170074
2015 N mineralization T1 Conventional Management R6 2015-07-07 2015-07-28 0.150455 0.1336906 -0.0167644
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