KBS003:Baseline Spatial Variability Study—Main Cropping System Experiment
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:
- geomorphology (elevation, soil bulk density and texture);
- soil chemistry (moisture, pH, inorganic N, total C and N);
- soil biology (microbial biomass C, respiration, and population size; N mineralization potentials; nematode counts by feeding type; seed bank);
- 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
- Status: completed
- Temporal Coverage 1988-01-01 to 1988-01-01
- Repository Link https://doi.org/10.6073/pasta/b49a09795d29e0c1149efcc068f3426e
Tables
- KBS003-001 Soil Bulk Density and Texture of MCSE Baseline Study
Soil bulk density and texture (percentage sand, silt and clay) of surface soils (0-15 cm) sampled in 1988 at an array of spatially referenced points across the LTER Main Site prior to the establishment of the MCSE. The designated MCSE treatment plot that includes the referenced point is also given.
- KBS003-002 Soil Total Carbon and Nitrogen of MCSE Baseline Study
Total carbon and nitrogen content, plus soil moisture and pH, of surface soils (0-15 cm) sampled in 1988 at an array of geo-referenced points across the LTER Main Site prior to establishment of the MCSE. The designated MCSE treatment plot that includes the referenced point is also given.
- KBS003-003 Elevation of MCSE Baseline Study
Elevation in 1988 at an array of geo-referenced points across the LTER Main Site prior to establishment of the MCSE.
- KBS003-004 Soil Microbial Biomass and Respiration of MCSE Baseline Study
Biomass C, respiration and population counts of soil microbial communities in surface soils (0-15 cm) sampled in 1988 at an array of geo-referenced points across the LTER Main Site prior to establishment of the MCSE.
- KBS003-005 Nematode Density of MCSE Baseline Study
Population counts, by feeding group, of nematodes in surface soils (0-15 cm) sampled in 1988 at an array of geo-referenced points across the LTER Main Site prior to establishment of the MCSE.
These data are summarized in the following publication:
Robertson, G. P. and D. W. Freckman. 1995. The spatial distribution of nematode trophic groups across a cultivated ecosystem. Ecology 76:1425-1432. https://doi.org/10.2307/1938145- KBS003-006 Soybean Biomass and Total Carbon and Nitrogen of MCSE Baseline Study
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.
- KBS003-007 Nitrogen Mineralization of MCSE Baseline Study
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.
- KBS003-008 Seed Bank of MCSE Baseline Study
Seedbank analysis of surface soils sampled in 1988 at an array of geo-referenced points across the LTER Main Site prior to establishment of the MCSE.
- KBS003-009 Plot Polygons
Spatial coordinates of the 1-ha treatment plots of the Main Cropping System Experiment (MCSE) at the LTER Main Site and the unmanaged successional sites. Plot ids are given as MCSE treatment number (T1-T8, SF, CF, DF) and replicate number (R1-R6).