• Address:
  705 Spear Street
  South Burlington, Vermont 05403
  United States of America
  
  Phone: (802) 391-4135
  Email: femc@uvm.edu
  Website: www.uvm.edu/femc

Ongoing forest soil monitoring is essential for understanding the impact of human activities. With funding from the Northern States Research Cooperative, we established 18 plots in Vermont's managed forests. Most are located in federal, state and town forests, parks and management areas. The initial primary focus was on soil carbon, which serves as a major reservoir for carbon storage in forests. Initial soil sampling was done in 2008/2009, along with measurement of aboveground biomass. In 2012/2013 we resampled to determine earthworm numbers and species, and also performed a detailed land-use history of each site. In addition, four sites were resampled to assess the impact of partial harvesting on carbon in the forest floor. We hope that these plots will continue to provide a good baseline for future work.

• dataset_eml_attributelistlabel: Site abbr.

• dataset_eml_attributelistdescription: Abbreviation for site

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: ordinal
• dataset_eml_attributelistformatstring: D-M-YY
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Pit number

• dataset_eml_attributelistdescription: Pit number (1-3). The pits were located at 0, 120, and 240 degrees from the plot center. The coring was performed every 60 degrees; therefore pit 2 was associated with core 3, and pit 3 associated with core 5.

• dataset_eml_attributeliststoragetype: int

• dataset_eml_attributelistmeasurementtype: ordinal
• dataset_eml_attributelistformatstring: D-M-YY
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Soil horizon identification

• dataset_eml_attributelistdescription: Simple soil horizon id. B horizons were often not further identified in the field, e.g. as Bh, Bhs, Bs, or Bw.

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: ordinal
• dataset_eml_attributelistformatstring: D-M-YY
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Soil horizon numbering

• dataset_eml_attributelistdescription: For sorting purposes, each horizon type was given a number: Oa=1, A=2, E=3, B=4, C=6 (not sure what happended to 5)

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: ordinal
• dataset_eml_attributelistformatstring: D-M-YY
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Upper boundary depth

• dataset_eml_attributelistdescription: Upper boundary depth of the horizon. Zero was assigned to the top of the Oa, if present, or A.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal

• dataset_eml_attributelistlabel: Lower boundary depth of the horizon

• dataset_eml_attributelistdescription: Lower boundary depth of the horizon. Zero was assigned to the top of the Oa, if present, or A

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: cm
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Soil deeper than lower boundary?

• dataset_eml_attributelistdescription: A plus sign next to the lowest boundary in a soil profile indicates that the soil was deeper than this boundary depth

• dataset_eml_attributeliststoragetype: text

• dataset_eml_attributelistmeasurementtype: ordinal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit:
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable aluminum

• dataset_eml_attributelistdescription: Exchangeable aluminum (Al3+) determined with a 1 molar ammonium chloride extraction

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: cmolc/kg (centimoles of charge per kilogram of soil)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable calcium

• dataset_eml_attributelistdescription: Exchangeable calcium (Ca2+) determined with a 1 molar ammonium chloride extraction

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• Unit: cmolc/kg (centimoles of charge per kilogram of soil)

• dataset_eml_attributelistlabel: Exchangeable magnesium

• dataset_eml_attributelistdescription: Exchangeable magnesium (Mg2+) determined with a 1 molar ammonium chloride extraction

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: cmolc/kg (centimoles of charge per kilogram of soil)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable potassium

• dataset_eml_attributelistdescription: Exchangeable potassium (K+) determined with a 1 molar ammonium chloride extraction

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: cmolc/kg (centimoles of charge per kilogram of soil)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable sodium

• dataset_eml_attributelistdescription: Exchangeable sodium (Na+) determined with a 1 molar ammonium chloride extraction

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: cmolc/kg (centimoles of charge per kilogram of soil)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Extractable iron

• dataset_eml_attributelistdescription: Extractable iron (Fe) determined with a 1 molar ammonium chloride extraction

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: cmol/kg (centimoles per kilogram of soil, not charge based)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Extractable manganese

• dataset_eml_attributelistdescription: Extractable manganese (Mn) determined with a 1 molar ammonium chloride extraction

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: cmol/kg (centimoles per kilogram of soil, not charge based)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Total organic carbon

• dataset_eml_attributelistdescription: Organic carbon determined by elemental analyzer

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: % (multiply by 10 to convert to g/kg)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Total nitrogen

• dataset_eml_attributelistdescription: Total nitrogen determined by elemental analyzer. The instrument calibration was off for the lower concentrations and values of 0.10% or lower were set as missing data (.)

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: % (multiply by 10 to convert to g/kg)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Bulk density calculated by site

• dataset_eml_attributelistdescription: Bulk density calculated using an individual equation developed by Juliette Juillerat for each site from the bulk densities core of increment samples. Carbon not used in the equation.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: Mg/m3 (g/cm3)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Bulk density calculated by single equation

• dataset_eml_attributelistdescription: Bulk density calculated using an equation developed by Juliette Juillerat for all sites combined from the bulk densities core of increment samples. Carbon not used in the equation. BD =0.07229+0.41609*ln(midpoint of horizon depth in cm))

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: Mg/m3 (g/cm3)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Bulk density calculated from organic carbon

• dataset_eml_attributelistdescription: From an equation developed in Watershed 3 of Hubbard Brook Experimental Forest that uses carbon. Not published. BD =1.4-0.756*log(org-C in %)

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: Mg/m3 (g/cm3)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Bulk density used to calculate cation pools

• dataset_eml_attributelistdescription: If the upper boundary was less than 10 cm, the equation with organic carbon was used. If not, the overall equation was used (developed from all 18 sites and based on the midpoint depth of the horizon). The shallow, high-carbon horizons were better suited to the equation using carbon.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: Mg/m3 (g/cm3)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Mass per m2 (kg)

• dataset_eml_attributelistdescription: The mass of the soil horizon per square meter, calculated from bulk density and horizon thickness. Used to calculate pools

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• Unit: kilograms per square meter

• dataset_eml_attributelistlabel: Thickness of horizon (m)

• dataset_eml_attributelistdescription: The lower boudary minus the upper boundary, expressed in meters. Used to calculate pools.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: meters
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Mass per m2 from 15x15 frame

• dataset_eml_attributelistdescription: The weight of the horizon sampled in a 15x15 cm frame. This was used in place of the calculated mass where feasible because it was deemed more accurate. Usually the average from three frames sampled adjacent to the soil pit.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: kilograms per square meter (kg/m2)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable aluminum cmolc/m2

• dataset_eml_attributelistdescription: Exchangeable aluminum (Al3+) pool calculated from concentration (determined with a 1 molar ammonium chloride extraction) and mass per square meter.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: centimoles of charge per square meter
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable calcium cmolc/m2

• dataset_eml_attributelistdescription: Exchangeable calcium (Ca2+) pool calculated from concentration (determined with a 1 molar ammonium chloride extraction) and mass per square meter.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: centimoles of charge per square meter
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable magnesium cmolc/m2

• dataset_eml_attributelistdescription: Exchangeable magnesium (Mg2+) pool calculated from concentration (determined with a 1 molar ammonium chloride extraction) and mass per square meter.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: centimoles of charge per square meter
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable potassium cmolc/m2

• dataset_eml_attributelistdescription: Exchangeable potassium (K+) pool calculated from concentration (determined with a 1 molar ammonium chloride extraction) and mass per square meter.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: centimoles of charge per square meter
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Exchangeable sodium cmolc/m2

• dataset_eml_attributelistdescription: Exchangeable sodium (Na+) pool calculated from concentration (determined with a 1 molar ammonium chloride extraction) and mass per square meter.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: centimoles of charge per square meter
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Extractable iron cmol/m2

• dataset_eml_attributelistdescription: Extractable iron (Fe) pool calculated from concentration (determined with a 1 molar ammonium chloride extraction) and mass per square meter.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: centimoles per square meter (not charge based)
• dataset_eml_attributelistnumbertype: -1

• dataset_eml_attributelistlabel: Extractable manganese cmol/m2

• dataset_eml_attributelistdescription: Extractable manganese (Mn) pool calculated from concentration (determined with a 1 molar ammonium chloride extraction) and mass per square meter.

• dataset_eml_attributeliststoragetype: decimal

• dataset_eml_attributelistmeasurementtype: nominal
• dataset_eml_attributelistformatstring: D-M-YY
• Unit: centimoles per square meter (not charge based)
• dataset_eml_attributelistnumbertype: -1