Nitrogen Mineralization of MCSE Baseline Study — Main Cropping System Experiment (MCSE)

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Nitrate (NO3-) and mineral nitrogen (NO3- + ammonium (NH4+)) and nitrification and minearlization potentials of surface soils (0-15 cm) collected in 1988 at an array of geo-referenced points across the LTER Main Site prior to the establishment of the MCSE.

This datatable is part of the Baseline Spatial Variability Study—Main Cropping System Experiment dataset.

This dataset contains the results of a spatial variability study conducted across the KBS LTER Main Site (48 ha) prior to establishment of the 1-ha treatment plots of the Main Cropping System Experiment (MCSE). During the 1988 growing season, the site was uniformly planted to a single variety of soybeans and a stratified unaligned sampling scheme was used to collect 400-600 geo-referenced samples across the site. Samples were analyzed for:

  1. geomorphology (elevation, soil bulk density and texture);
  2. soil chemistry (moisture, pH, inorganic N, total C and N);
  3. soil biology (microbial biomass C, respiration, and population size; N mineralization potentials; nematode counts by feeding type; seed bank);
  4. primary production (soybean biomass, soybean C and N).

Most soil samples (0-15 cm) were taken before crop emergence; plant biomass samples were taken at physiological maturity. Dried soil and plant samples were archived for potential future analysis.

Data in this dataset are summarized in the publication:
Robertson, G. P., K. M. Klingensmith, M. J. Klug, E. A. Paul, J. R. Crum, and B. G. Ellis. 1997. Soil resources, microbial activity, and primary production across an agricultural ecosystem. Ecological Applications 7:158-170.[0158:SRMAAP]2.0.CO;2


Experiment: Main Cropping System Experiment (MCSE)
Data available from: January 1988
Dataset: KBS003
Datatable ID: KBS003-007.101
Core Areas Inorganic Nutrients,Disturbance
Repository link:
Related Tables:
Last Updated 2024-03-18
Variate Description Units
year year of the observation
easting easting of the sample location in UTM 16N
northing northing of the sample location in UTM 16N
ino3 nitrate-N pool in ug N/g soil μg/g
pno3 net nitrification potential in ug N/g soil/d μg/g/day
imin mineral-N pool (NH4-N + NO3-N) in ug N/g soil μg/g
pmin net N mineralization potential in ug N/g soil/d μg/g/day
ino3 m2 nitrate-N pool (areal basis) in g N/m2 g/m2
pno3 m2 net nitrification potential (areal basis) in g N/m2/d
imin m2 mineral-N pool (NH4 + NO3 ) (areal basis) in g N/m2 g/m2
pmin m2 net mineralization potential (areal basis) in g N/m2/d

Data Excerpt

year easting northing ino3 pno3 imin pmin ino3_m2 pno3_m2 imin_m2 pmin_m2
1988 633981 4696121 3.8 0.42 6.94 0.4 0.86 0.095 1.56 0.09
1988 634280 4696128 7.1 0.41 9.45 0.4 1.58 0.091 2.1 0.089
1988 634081 4696127 7.22 0.52 12.97 0.4 1.42 0.102 2.55 0.079
1988 633913 4696126 9.72 0.7 15.18 0.61 1.55 0.111 2.41 0.097
1988 633914 4696128 4.64 0.53 7.3 0.54 0.75 0.086 1.18 0.087
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