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Abstract: LTER - Long-Term Ecological Research Program/Kellogg Biological
LTER/KBS003 [Summary adapted from the LTER Core Data Set Catalog]:
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 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
characteristics (rate of crop phenological development, crop biomass
at maturity, crop N content, 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 analyses.
Special Comments: Data set contains data for each variate at each
sample point as well as semivariograms and an interpolation file derived by
kriging at 3-m intervals across the site.
The 1,000 ha W.K. Kellogg Biological Station has been administered by
Michigan State University as a primary research facility since its
1929 deeding to the university by Kellogg. In its early years the
Station was devoted to wildlife, forestry, and soil conservation
research; during the past 20 years a research emphasis on ecology,
production agronomy, and forest genetics has led to well-established
and internationally recognized programs in each of these fields. The
mission of the Station, supported by 10 year-round resident faculty
from several university departments, in addition to campus-based
faculty and visiting scientists, puts a primary emphasis on
maintaining an environment for interdisciplinary research in ecology,
agriculture, and natural resources.
KBS LTER research topics include ecological interactions underlying
the productivity and environmental impact of production-level cropping
systems; patterns, causes, and consequences of microbial, plant, and
insect diversity in agricultural landscapes; gene transfer, community
dynamics and biogeochemical fluxes.
Information about the Long-Term Ecological Research (LTER) Program can
be obtained from:
LTER Network Office
ISO Topic Category
Access Constraints Available for public access.
Gross, Katherine L.; Karen A. Renner. 1989. "A new method for
estimating seed numbers in the soil", Weed Science, vol 37, pp.
Gross, Katherine L. 1990. "A comparison of methods for estimating seed
numbers in the soil" Journal of Ecology, vol. 78, pp. 1079-1093
Gross, Katherine L.; Deborah Maruca; Kurt S. Pregitzer. 1992.
"Seedling growth and root morphology of plants with different
life-histories". New Phytologist, vol 120, pp. 535-542
Paul, Eldor A.; G. Phillip Robertson. 1989. "Ecology and the
agricultural sciences: a false dichotomy", Ecology, vol. 70, pp.
Robertson, G. Philip. 1987. "Geostatistics in ecology: interpolating
with known variance", Ecology, vol. 68, pp. 744-748
See also: http://lter.kbs.msu.edu/Publications/index.htm
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