Soybean Biomass and Total Carbon and Nitrogen of MCSE Baseline Study — 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Data in the KBS LTER core database may not be published without written permission of the lead investigator or project director Full terms of use

Biomass and total carbon and nitrogen content of whole, aboveground soybean plants at harvest in 1988 at an array of geo-referenced points across the LTER Main Site prior to 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. https://doi.org/10.1890/1051-0761(1997)007[0158:SRMAAP]2.0.CO;2

Note

Experiment: Main Cropping System Experiment (MCSE)
Data available from: January 1988
Dataset: KBS003
Datatable ID: KBS003-006.83
Core Areas Primary Production,Populations,Organic Matter,Disturbance
Repository link: http://doi.org/10.6073/pasta/b49a09795d29e0c1149efcc068f3426e
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Last Updated 2023-10-24
Variate Description Units
year year of the observation
easting easting of the sample location in UTM 16N
northing northing of sample location in UTM 16N
soyn soybean whole-plant N content at maturity in %N %
soyc soybean whole-plant C content at maturity in %C %
soycn soybean whole-plant C:N ratio
soy gm soybean whole-plant biomass at maturity (areal basis) in g/m2 g/m2
soy gp soybean whole-plant biomass at maturity (per plant basis) in g/ plant
soy n gm soybean whole-plant N content at maturity (areal basis) in g N/m2
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Data Excerpt

year easting northing soyn soyc soycn soy_gm soy_gp soy_n_gm
1988 633981 4696121
1988 634280 4696128 3.23 43.7 13.53 240.16 18.3 7.76
1988 634081 4696127 3.03 42.57 14.05 134.86 20.55 4.09
1988 633913 4696126 3.84 43.23 11.26 245.89 31.23 9.44
1988 633914 4696128 3.82 45.1 11.81 250.39 63.6 9.56
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