Baseline Spatial Variability Study
Results from a study of spatial variability conducted across the main experimental 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 samples across the site (uniformly planted to a single variety of soybeans) for:
- geomorphological characteristics (microtopography, soil horizon depths, bulk density, texture);
- soil chemical characteristics (pH, NO3, NH4, total C, total N, moisture, inorganic P, trace metals);
- soil biological characteristics (N mineralization potentials, microbial biomass C, microbial biomass N, fungal/bacterial ratios, nematodes and other soil invertebrates; seed bank size);
- plant weed species abundance, weed biomass at peak standing crop); and
- 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.
- Status: complete
- Date Initiated: 1988-05-01
- Date Completed:
Tables
- KBS003-001 Baseline Soil Physical Properties
Baseline soil physical properties were analyzed for an array of sample points prior to the sta...
- KBS003-002 Baseline Soil Chemical Properties
Baseline soil chemical properties were analyzed for an array of sample points prio...
- KBS003_003 Elevation
- KBS003_004 Microbial Biomass and Respiration
- KBS003_005 Baseline Nematode Data
- KBS003_006 Baseline Soybean Biomass
- KBS003_007 Baseline Nitrogen Mineralization
- KBS003_008 Baseline Seedbank
- Baseline Seedbank was analyzed for an array of sample points prior to the start of the main site ...
Protocols
Personel
- Original investigators