Baseline Spatial Variability Study - Seed Bank

The seedbank was analyzed for an array of geo-referenced points prior to the start of the Main Cropping System Experiment.

This datatable is part of the Baseline Spatial Variability Study dataset. A spatial variability study conducted across the LTER Main Site area (45 ha) at KBS prior to dividing the site into 1-ha experimental plots. During the 1988 growing season a stratified unaligned sampling scheme was used to collect 400-600 geo-referenced samples across the site (uniformly planted to a single variety of soybeans) for:

  1. geomorphological characteristics (microtopography, soil horizon depths, bulk density, texture);
  2. soil chemical characteristics (pH, NO3, NH4, total C, total N, moisture, inorganic P, trace metals);
  3. soil biological characteristics (N mineralization potentials, microbial biomass C, microbial biomass N, fungal/bacterial ratios, nematodes and other soil invertebrates; seed bank size);
  4. plant weed species abundance, weed biomass at peak standing crop); and
  5. insect characteristics (major pest and predator species).

Most soil samples were taken before crop emergence, plant phenology samples were taken throughout the growing season, biomass samples were taken at physiological maturity, and insect samples were taken continuously. Dried soil and plant samples are archived for potential future analysis.

Note

Experiment: Main Cropping System Experiment (MCSE)
Data available from: January 1988
Dataset: KBS003
Datatable ID: KBS003-008.32
Core Areas Populations,Disturbance
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Last Updated 2017-01-26
Status
  • Completed
Variate Description Units
year year of the observation
easting easting of the sample location in UTM 16N meter
northing northing of the sample location in UTM 16N meter
depth soil sample depth in cm centimeter
species species name dimensionless
seedlings number of seedlings per sample dimensionless
comment a comment about this sample point

Data Excerpt

year easting northing species depth seedlings comment
1988 633913 4696126 Amaranthus albus L. 0-5 0
1988 633913 4696126 Amaranthus retroflexus L. 0-5 0
1988 633913 4696126 Apocynum cannabinum L. 0-5 0
1988 633913 4696126 Chenopodium album L. 0-5 0
1988 633913 4696126 Panicum capillare L. 0-5 0
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