KBS021:Soil Inorganic Nitrogen on the Main Cropping System Experiment

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.

Tables

KBS021-001 Soil Inorganic Nitrogen by Treatment

Average concentrations of nitrate (NO3-N) and ammonium (NH4-N), expressed as micrograms N per gram dry soil, in surface soils (0-25 cm) of MCSE treatments. Treatment averages are derived from datatable KBS021-002.

KBS021-002 Soil Inorganic Nitrogen

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).

KBS021-004 Soil Nitrogen Mineralization

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).

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