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Calhoun Long-Term Soil-Ecosystem Experiments - LTSE

Relationships
Publications: 
Bioavailability of slowly cycling soil phosphorus: Major restructuring of soil-P fractions over four decades in an aggrading forest
Publications: 
Changes in stable isotopic signatures of soil nitrogen and carbon during 40 years of forest development
Publications: 
Legacies of agriculture and forest regrowth in the nitrogen of old-field soils
Publications: 
Long-term soil potassium availability from a Kanhapludult to an aggrading loblolly pine ecosystem
Publications: 
Rapid accumulation and turnover of soil carbon in a re-establishing forest
Publications: 
Soil chemical change during three decades in an old-field loblolly pine (Pinus taeda L.) ecosystem
Publications: 
The Calhoun Experimental Forest
Publications: 
Understanding Ecosystem Change at the Calhoun Experimental Forest.
Images: 
Calhoun Gullies
Images: 
Calhoun Gullies along Road 1950s
Data Holder: 
Richter, Daniel
Location:
Sumter National Forest
SC
United States
Latitude: 34.607991
Longitude: -81.723872
Background
Continent: 
North America
Website: 
http://calhoun.env.duke.edu/
Year LTSE Began: 
1957
On-going or Terminated?: 
On-going
Comments: 
Box 90328; LSRC, NSEES, Duke University, Durham, NC 27708 USA Originators: Drs. Louis Metz and Carol G. Wells, USDA Forest Service scientists archive - Rain, throughfall, soil solutions every 2 or 3 weeks 1992-1994; 2003-2005. gas - Periodic collections of soil CO2 and gas fluxes. Radon, O2, and methane also occassionally collected.
Environment
Annual Precipitation (mm): 
1200-2000
Mean Annual Soil Temperature (C): 
Thermic: 15 to 22C
Soil moisture regime: 
Udic
Is atmospheric deposition chemistry monitored?: 
Yes
Dominant plant species (latin genus and species): 
Loblolly pine (Pinus taeda L.) seedlings planted 1957
Landuse: 
Forestry
Ecoregion: 
Warm Subtropical
Landform (general description): 
Upper level surface of interfluve
Slope (%): 
0-2%
Geological material: 
Granitic gneiss
Experimental Design
Design (short description): 
4x4 randomized block design
Permanent plot area (square meters): 
1000-3000
Number of permanent plots: 
10-20
Soil Classification
soilorder: 
Ultisol
Soil taxa (ex, Great Group of Soil Taxonomy): 
Fine, kaolinitic, thermic Typic Kanhapludult
Soil/Data Archive
Vegetative samples archived: 
Yes
Soil solid samples archived: 
Yes
Samples from multiple depths: 
Yes
Sample frequency: 
>Every 5 years
Year of first sampling for archive: 
1962
Year of last sampling for archive: 
2005
Soil Solid Data
pH and acidity: 
Yes
Organic Carbon: 
Yes
Nitrogen: 
Yes
Other macronutrients: 
Yes
Micronutrients: 
Yes
Bulk Density: 
Yes
Mineralogy: 
Yes
Soil Water Data
pH and alkalinity: 
Yes
Dissolved organic carbon: 
Yes
Other macronutrients: 
Yes
Micronutrients: 
Yes
Soil Gas Data
Surface Fluxes: 
Yes
Concentrations belowground: 
Yes
Vegetation Data
Biomass above ground: 
Yes
Biomass below ground: 
Yes
Macronutrient contents: 
Yes
Micronutrient contents: 
Yes
Soil Biota Data
Macro-invertebrates: Biomass, Densities, Taxonomy: 
Yes
Micro-invertebrates: Biomass, Densities, Taxonomy: 
Yes
Microorganisms: Biomass, Densities, Taxonomy: 
Yes
Molecular biology studies: 
Yes