Baseline Spatial Variability Study - Nematodes — Main Cropping System Experiment (MCSE)

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Nematode counts were determined 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 (0-15cm) 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.


Experiment: Main Cropping System Experiment (MCSE)
Data available from: January 1988
Dataset: KBS003
Datatable ID: KBS003-005.48
Core Areas Populations,Disturbance
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Last Updated 2020-07-10
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
fungivorus nematodes m2 number of fungivorus nematodes per square meter number/metersquared
bacteriovorus nematodes m2 number of bacteriovorus nematodes per square meter number/metersquared
omnivorous nematodes m2 number of omnivorous nematodes per square meter number/metersquared
predaceous nematodes m2 number of predaceous nematodes per square meter number/metersquared
total nematodes m2 number of total nematodes per square meter number/metersquared

Data Excerpt

year easting northing fungivorus_nematodes_m2 bacteriovorus_nematodes_m2 omnivorous_nematodes_m2 predaceous_nematodes_m2 total_nematodes_m2
1988 633981 4696121 106236.0 318709.0 81721.0 40860.0 547527.0
1988 634280 4696128 456620.0 573429.0 42476.0 116809.0 1189335.0
1988 634081 4696127 48413.0 648739.0 125874.0 48413.0 871440.0
1988 633913 4696126 463998.0 263636.0 21091.0
1988 633914 4696128
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