BOREAS TE-20 NSA Soil Lab Data Summary This data set contains the major soil properties of soil samples collected at the tower flux sites in the NSA. The soil samples were collected by Hugo Veldhuis and his staff from the University of Manitoba. The mineral soil samples were largely analyzed by Barry Goetz, under the supervision of Dr. Harold Rostad at the University of Saskatchewan. The organic soil samples were largely analyzed by Peter Haluschak, under the supervision of Hugo Veldhuis at the Centre for Land and Biological Resources Research in Winnipeg, Manitoba. During the course of field investigation and mapping, selected surface and subsurface soil samples were collected for laboratory analysis. These samples were used as benchmark references for specific soil attributes in general soil characterization. Detailed soil sampling, description and laboratory analysis were performed on selected modal soils to provide examples of common soil physical and chemical characteristics in the study area. The soil properties that were determined include soil horizon; dry soil color; pH; bulk density; total, organic, and inorganic carbon; electric conductivity; cation exchange capacity; exchangeable sodium, potassium, calcium, magnesium, and hydrogen; water content at 0.01, 0.033, and 1.5 MPascals; nitrogen; phosphorus; particle size distribution; texture; pH of the mineral soil and of the organic soil; extractable acid; and sulfur. These data are stored in ASCII text files. Table of Contents * 1 Data Set Overview * 2 Investigator(s) * 3 Theory of Measurements * 4 Equipment * 5 Data Acquisition Methods * 6 Observations * 7 Data Description * 8 Data Organization * 9 Data Manipulations * 10 Errors * 11 Notes * 12 Application of the Data Set * 13 Future Modifications and Plans * 14 Software * 15 Data Access * 16 Output Products and Availability * 17 References * 18 Glossary of Terms * 19 List of Acronyms * 20 Document Information 1. Data Set Overview 1.1 Data Set Identification BOREAS TE-20 NSA Soil Lab Data 1.2 Data Set Introduction This data set was collected by Hugo Veldhuis, who worked under contract with the BOReal Ecosystem-Atmosphere Study (BOREAS) Terrestrial Ecology (TE)-20 team to collect soil samples at the BOREAS Northern Study Area (NSA) tower sites and to provide the results of various laboratory tests performed on the soil samples. 1.3 Objective/Purpose There was a general need within BOREAS for soil properties to be obtained. These data were not collected with any particular application in mind. Various groups in BOREAS needed measurements of soil carbon content, bulk density, electrical conductivity (EC), and other soil properties for use in ecological models. 1.4 Summary of Parameters The following soil parameters were measured: bulk density, pH of the soil, total carbon (TC), organic carbon (OC), inorganic carbon (IC), buffered cation exchange capacity (CEC), exchangeable sodium (Na), exchangeable potassium (K), exchangeable calcium (Ca), exchangeable magnesium (Mg), field moisture, saturated moisture, wilting moisture, total nitrogen (N), particle size distribution, extractable acidity, and total sulfur (S). 1.5 Discussion During the field investigation and mapping, selected surface and subsurface soil samples were collected for laboratory analysis. These samples were used as benchmark references for specific soil attributes in general soil characterization. Detailed soil sampling, description and laboratory analysis were performed on selected modal soils to provide examples of common soil physical and chemical characteristics in the study area. 1.6 Related Data Sets BOREAS Agriculture Canada Central Saskatchewan Vector Soils Data BOREAS CanSIS Regional Soils Data in Vector Format BOREAS Regional Soils Data in Raster Format and AEAC Projection BOREAS Soils Data over the SSA in Raster Format and AEAC Projection BOREAS TE-01 Soils Data over the SSA Tower Sites in Raster Format BOREAS TE-01 SSA Soil Lab Data BOREAS TE-20 Soils Data over the NSA and Tower Sites in Raster Format BOREAS TE-20 Soils Data over the NSA and Tower Sites in Vector Format BOREAS TGB-12 Soil Carbon and Flux Data of NSA-MSA in Raster Format BOREAS TGB-12 Soil Carbon Data over the NSA 2. Investigator(s) 2.1 Investigator(s) Name and Title Hugo Veldhuis, Senior Pedologist Agriculture & Agri-Food Canada 2.2 Title of Investigation Soils of Tower Sites and Super Site, Northern Study Area, Thompson, Manitoba, Canada 2.3 Contact Information Contact 1 -------------- Hugo Veldhuis Centre for Land & Biological Resources Research Manitoba Land Resource Unit Univ. of Manitoba Winnipeg, MB CANADA (204) 474-6124 (204) 474-7633 (fax) Contact 2 --------------- David Knapp Raytheon STX Corporation NASA GSFC Greenbelt, MD (301) 286-1424 (301) 286-0239 (fax) David.Knapp@gsfc.nasa.gov 3. Theory of Measurements A number of different soil properties were measured for use by BOREAS investigators. The theory and methods used to measure these properties are as follows: Bulk Density: An intact known volume of soil is removed, dried, and weighed; the density can then be calculated. TC: All types of carbon will be combusted into carbon dioxide (CO2) in a flow of oxygen (O2) at 2,500 °F. IC: IC reacts with acid producing CO2, which is quantified through titration. OC: Equals measured TC minus measured IC. EC: The soil’s ability to carry an electrical current which is indicative of salt content. CEC: If a soil is washed with one cation (Ba), and the other cations are leached, the first cation fills the exchange sites of the leached cation, and equals the soil's CEC. Exchangeable Cations: Equals the quantity of cations in the leachate after they have been exchanged off the soil. Soil Moisture Retentions: Equals the amount of water in soils under a suction equal to 1/10, 1/3, and 15 atmospheres (i.e., field moisture 10th, saturated moisture, and wilting moisture, as described respectively in the original soil analysis report). Soil Size Fractions: Clay and silt are measured based on the principle that the speed at which a particle will fall in water will depend on the size of the particle. 4. Equipment 4.1 Sensor/Instrument Description Bulk density: 10 cm diameter tube, 10 cm long. TC: LECO CR12 Carbon Determinator 781-600 CEC and exchangeable cations: Cation concentrations were measured by atomic adsorption-Perkin Elmer 3100. Equipment used in other procedures is listed in the references and manuals listed in Section 17. 4.1.1 Collection Environment None given. 4.1.2 Source/Platform Not applicable. 4.1.3 Source/Platform Mission Objectives Not applicable. 4.1.4 Key Variables Soil Horizon Soil Color (Dry) pH Bulk Density Total Carbon Organic Carbon Inorganic Carbon Electric Conductivity Cation Exchange Capacity Exchangeable Sodium Exchangeable Potassium Exchangeable Calcium Exchangeable Magnesium Exchangeable Hydrogen Water Content at a pressure of 0.1 atmospheres (0.01 MPascals) Water Content at a pressure of 0.33 atmospheres (0.033 MPascals) Water Content at a pressure of 15 atmospheres (1.5 MPascals) Nitrogen Phosphorus Percentage of Very Coarse Sand Percentage of Coarse Sand Percentage of Medium Sand Percentage of Fine Sand Percentage of Very Fine Sand Percentage of Total Sand Percentage of Total Silt Percentage of Total Clay Texture Horizon Number pH of the Mineral Soil (CaCl2) pH of the Organic Soil (CaCl2) pH of the Mineral Soil (H2O) pH of the Organic Soil (H2O) Extractable Acid Sulfur 4.1.5 Principles of Operation None given. 4.1.6 Sensor/Instrument Measurement Geometry Not applicable. 4.1.7 Manufacturer of Sensor/Instrument None given. 4.2 Calibration Calibration information was provided for the following instruments: Total Carbon: LECO 501-034 12% Dry soil colors were measured according to the Munsell color chart. All other standards were prepared in the laboratory from pure analytical compounds and tested against National Institute of Standards and Technology (NIST) standards. 4.2.1 Specifications None given. 4.2.1.1 Tolerance None given. 4.2.2 Frequency of Calibration None given. 4.2.3 Other Calibration Information None. 5. Data Acquisition Methods Bulk Density: Cylinders of known volume and weight are pressed into the soil and filled with soil in its natural state. The soil and cylinder are dried at 105 °C and weighed. The soil weight is then calculated and divided by the cylinder volume (Manual on Soil Sampling and Methods of Analysis). TC: Measured by combustion of dried soil samples in a LECO CR12 Carbon Determinator (LECO Corporation Application Bulletin form no. 203-601-071). IC: Measured through digestion in acid, and evolved CO2 is measured directly as carbonic acid in a two-endpoint titration (Tiessen et al., 1983). OC: Equals measured TC minus measured IC. Total Nitrogen and Phosphorus: Digestion in H2SO4 and H2O2 (Thomas et al., 1967). Products NH4+ and P were measured colormetrically by the ammonia-salicylate method (Technicon, 1973) and acid-molybdate blue method (Murphy and Riley, 1962), respectively. Electrical conductivity and pH: Standard laboratory meter. CEC: The cations on the exchange are replaced with barium (Ba), which is then exchanged off the soil with NH4 and the amount of Ba is measured (p. 54, Manual on Soil Sampling and Methods of Analysis). Exchangeable Cations: Measured in leachate after Ba has exchanged them off the soil; Na+, K+, Ca2+, Mg2+ by atomic absorption and H+ by back titration with HCl to pH 5.1 (p. 83, Manual on Soil Sampling and Methods of Analysis). Soil Moisture Retentions: Pressure plate extraction (p. 45, Manual on Soil Sampling and Methods of Analysis). Soil Size Fractions: Pipette method (p. 6, Manual on Soil Sampling and Methods of Analysis). 6. Observations 6.1 Data Notes The table below lists soil classification (by order, sub-group, and soil type), site location, soil polygon (Polynum), and BOREAS site location of soil pits in this study. This information enables the user to spatially link soils data from this study to the TE-20 Soils Data over the NSA-MSA and Tower Sites in Raster Format and TGB-12 Soil Carbon and Flux Data of NSA-MSA in Raster Format. See TE-20 soils data documentation, TE-20 Soils Report, and Soil Classification Working Group (1998) for detailed description of soil classification. Soil Pit Order Sub- group Soil Type Site Polynum (TE-20 data set) BOREAS Site Location FEN02 ORGANIC TYF FEN Fen 21 NSA-FEN-FLXTR 9-TE20-SOLO2 FEN04 CRYSOLIC MEOC PAA Fen 16 NSA-FEN-FLXTR 9-TE20-SOLO4 FEN06 CRYSOLIC MEOC PAA Fen 16 NSA-FEN-FLXTR 9-TE20-SOLO6 FEN07 ORGANIC TYF BGC Fen 10 NSA-FEN-FLXTR 9-TE20-SOLO7 FEN08 CRYOSOLIC TMEOC PLH Fen 12 NSA-FEN-FLXTR 9-TE20-SOLO8 FEN09 ORGANIC TYF FCD Fen 8 NSA-FEN-FLXTR 9-TE20-SOLO9 OBS01 LUVISOLIC OGL WBW Obs 31 NSA-OBS-FLXTR 9-TE20-SOLO1 OBS02 LUVISOLIC OGL SWK Obs 19 NSA-OBS-FLXTR 9-TE20-SOLO2 OBS03 CRYOSOLIC RSC PLH Obs 12 NSA-OBS-FLXTR 9-TE20-SOLO3 OBS04 CRYSOLIC TFIOC NIC Obs 16 NSA-OBS-FLXTR 9-TE20-SOLO4 OBS05 CRYSOLIC TFIOC NIC Obs 21 NSA-OBS-FLXTR 9-TE20-SOLO5 OBS06 GLEYSOLIC OLG LPR Obs 15 NSA-OBS-FLXTR 9-TE20-SOLO6 OBS07 LUVISOLIC OGL WBW Obs 19 NSA-OBS-FLXTR 9-TE20-SOLO7 OJP01 BRUNISOLIC EDYB PCP Ojp 9 NSA-OJP-FLXTR 9-TE20-SOLO1 OJP02 BRUNISOLIC EDYB PCP Ojp 13 NSA-OJP-FLXTR 9-TE20-SOLO2 OJP03 BRUNISOLIC EDYB PCP Ojp 9 NSA-OJP-FLXTR 9-TE20-SOLO3 OJP04 BRUNISOLIC EDYB PCP Ojp 9 NSA-OJP-FLXTR 9-TE20-SOLO4 OJP05 BRUNISOLIC EDYB PCP Ojp 2 NSA-OJP-FLXTR 9-TE20-SOLO5 OJP06 BRUNISOLIC EDYB PCP Ojp 3 NSA-OJP-FLXTR 9-TE20-SOLO6 OJP07 GLEYSOLIC OG WTP Ojp 12 NSA-OJP-FLXTR 9-TE20-SOLO7 OTA01 LUVISOLIC OGL WBW Ota 5 NSA-90A-9TETR 9-TE20-SOLO1 OTA02 LUVISOLIC OGL PPU Ota 13 NSA-90A-9TETR 9-TE20-SOLO2 US01 LUVISOLIC OGL SWK Sst 41 NSA-9BS-9TETR 9-TE20-SOLO1 YJP01 GLEYSOLIC OG PCH Yjp 12 NSA-YJP-FLXTR 9-TE20-SOLO1 YJP02 BRUNISOLIC EDYB PCP Yjp 1 NSA-YJP-FLXTR 9-TE20-SOLO2 YJP03 BRUNISOLIC EDYB PCP Yjp 14 NSA-YJP-FLXTR 9-TE20-SOLO3 YJP04 BRUNISOLIC GLEDYB PCB Yjp 9 NSA-YJP-FLXTR 9-TE20-SOLO4 YJP05 BRUNISOLIC GLEDYB LWP Yjp 9 NSA-YJP-FLXTR 9-TE20-SOLO5 YJP06 BRUNISOLIC EDYB CLK Yjp 17 NSA-YJP-FLXTR 9-TE20-SOLO6 SOILDEV = Soil development (soil classification). Order Sub-Group Brunisolic EDYB Eluviated Dystric Brunisol GLEDYB Gleyed Eluviated Dystric Brunisol EEB Eluviated Eutric Brunisol GLEEB Gleyed Eluviated Eutric Brunisol Gleysolic OHG Orthic Humic Gleysol RHG Rego Humic Gleysol OG Orthic Gleysol FEG Ferric Gleysol OLG Orthic Luvic Gleysol HULG Humic Luvic Gleysol Luvisolic OGL Orthic Gray Luvisol DGL Dark Gray Luvisol GLGL Gleyed Gray Luvisol GLDGL Gleyed Dark Gray Luvisol Organic TYF Typic Fibrisol MEF Mesic Fibrisol TF Terric Fibrisol TMEF Terric Mesic Fibrisol HYF Hydric Fibrisol TYM Typic Mesisol FIM Fibric Mesisol TM Terric Mesisol TFIM Terric Fibric Mesisol THUM Terric Mesic Humisol TH Terric Humisol TFIH Terric Fibric Humisol TMEH Terric Mesic Humisol Cryosolic OSC Orthic Static Cryosol RSC Regosolic Static Cryosol OTC Orthic Turbic Cryosol RTC Regosolic Turbic Cryosol FIOC Fibric Organic Cryosol MEOC Mesic Organic Cryosol HUOC Humic Organic Cryosol TFIOC Terric Fibric Organic Cryosol TMEOC Terric Mesic Organic Cryosol THUOC Terric Humic Organic Cryosol VARIANT Code Class c Cryic l Lithic p Peaty SOIL TYPE (See TE-20 Soils Report for descriptions of soil types.) ATK - Atik BDY - Baldy BGC - Bog Collapse BRN - Brannigan Creek BTT - Button CLK - Clarke CMK - Cormorant Lake FCD - Fen Collapse FEN - Fen GRS - Grass River LPR - La Perouse LWP - Low Pine MDR - Medard NIC - Nichols Lake PAA - Palsa PCB - Partridge Beak PCH - Partridge Head PCP - Partridge Crop PKW - Pakwa PLH - Palsa Hummock PLT - Plateau PPU - Pipun ROK - Roe Lake SWK - Sipiwesk SYB - Sandy Bog TBL - Turnbull TFN - Thaw Fen TYL - Tyrrell WBW - Wabowden WRL - Warren Landing WTP - Wet Pine YGP - Young Pine SOIL PHASE Code d Deep h Humus s Shallow v Very deep w Very shallow x Complex Note: The TGB-12 and TE-20 raster data sets cover the same area of the NSA-MSA. Both data sets contain a raster image and an attribute file that describes each soil polygon. The TGB-12 raster data was modified to account for the 1981 burn. In this data set polygons with POLYNUM 238 - 248 are within the burn. 6.2 Field Notes None given. 7. Data Description 7.1 Spatial Characteristics 7.1.1 Spatial Coverage The tower flux sites are located in the NSA at the following North American datum 1983 (NAD83) coordinates: Longitude Latitude ----------- ----------- Old Black Spruce (OBS) 98.48139 W 55.88007 N Old Jack Pine (OJP) 98.623958 W 55.9284153 N Fen 98.420716 W 55.9148083 N Young Jack Pine (YJP) 98.287056 W 55.8957528 N Aspen (aux. site T2Q6A) 98.674786 W 55.8869081 N 7.1.2 Spatial Coverage Map None. 7.1.3 Spatial Resolution These data represent point locations. 7.1.4 Projection Not applicable. 7.1.5 Grid Description Not applicable. 7.2 Temporal Characteristics 7.2.1 Temporal Coverage All measured parameters will change only over the long term, so any data could be valuable to generalize the soil characteristics of the area for many years in the future. 7.2.2 Temporal Coverage Map The measurement of these soil properties was based on soil samples that were collected in 1994. 7.2.3 Temporal Resolution The soil samples were collected at a certain point in time. However, the soil properties that were derived from the samples do not tend to change significantly with time. 7.3 Data Characteristics Data characteristics are defined in the companion data definition file (te20sldn.def). 7.4 Sample Data Record Sample data format shown in the companion data definition file (te20sldn.def). 8. Data Organization 8.1 Data Granularity All of the NSA Soil Lab Data are contained in one dataset. 8.2 Data Format(s) The data files contain numerical and character fields of varying length separated by commas. The character fields are enclosed with a single apostrophe marks. There are no spaces between the fields. Sample data records are shown in the companion data definition file (te20sldn.def). 9. Data Manipulations 9.1 Formulae None given. 9.1.1 Derivation Techniques and Algorithms Not applicable. 9.2 Data Processing Sequence 9.2.1 Processing Steps None given. 9.2.2 Processing Changes None given. 9.3 Calculations 9.3.1 Special Corrections/Adjustments None given. 9.3.2 Calculated Variables None. 9.4 Graphs and Plots None. 10. Errors 10.1 Sources of Error Most errors incurred would be due to the heterogeneity of soils and to equipment precision, all of which would be within the limits required for the use of these data. 10.2 Quality Assessment The soil survey was performed by a soil expert who has many years of soil survey field experience. As a result, there is a great deal of confidence in the field visual observations and in the quality of soil samples brought into the lab for analysis. All methods for measuring soil characteristics have been performed routinely in the soil survey division of the Centre for Land and Biological Resources Research. All methods have been tested thoroughly for accuracy, accepted for the general soil survey of Saskatchewan, and approved at the federal research level. 10.2.1 Data Validation by Source None given. 10.2.2 Confidence Level/Accuracy Judgment See Section 10.2. 10.2.3 Measurement Error for Parameters The error ranges for most of the parameters are as follows: pH: 5% Bulk Density: 5% TC and IC: 3% Total Nitrogen and Phosphorus: 5% EC and CEC: 5% Exchangeable H+: 10% Soil Moisture Retentions (0.3, 0.1, and 15 atm): 5% Particle Size Fractions: 5% 10.2.4 Additional Quality Assessments None. 10.2.5 Data Verification by Data Center A cursory review of the data was made to ensure that the data were as expected. Some spot checks were made to confirm that the data were within the realm of possibility. The data were checked after loading into the relational data base to ensure that no errors occurred during loading. 11. Notes 11.1 Limitations of the Data None given. 11.2 Known Problems with the Data None given. 11.3 Usage Guidance None given. 11.4 Other Relevant Information None. 12. Application of the Data Set This data set was created for use by BOREAS investigators to use in ecological models and other research purposes. 13. Future Modifications and Plans None. 14. Software 14.1 Software Description None. 14.2 Software Access None. 15. Data Access 15.1 Contact Information Ms. Beth Nelson BOREAS Data Manager NASA GSFC Greenbelt, MD (301) 286-4005 (301) 286-0239 (fax) Elizabeth.Nelson@gsfc.nasa.gov 15.2 Data Center Identification See Section 15.1. 15.3 Procedures for Obtaining Data Users may place requests by telephone, electronic mail, or fax. 15.4 Data Center Status/Plans The TE-20 lab soil data are available from the Earth Observing System Data and Information System (EOSDIS) Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC). The BOREAS contact at ORNL is: ORNL DAAC User Services Oak Ridge National Laboratory (865) 241-3952 ornldaac@ornl.gov ornl@eos.nasa.gov 16. Output Products and Availability 16.1 Tape Products None. 16.2 Film Products None. 16.3 Other Products The data are available as ASCII files. 17. References 17.1 Platform/Sensor/Instrument/Data Processing Documentation Manual on Soil Sampling and Methods of Analysis. 1978. J.A. McKeague (Ed). Canadian Soil Science Society. Technicon Industrial Systems. 1973. Nitrate and nitrite in water and waste water. Industrial Method No. 100-70W. Technicon Industrial Systems, Tarrytown, NY. 17.2 Journal Articles and Study Reports Murphy, J. and J.P. Riley. 1962. A modified single solution method for determination of phosphate in natural waters. Anal. Chim. Acta. 27: 31-36. Sellers, P. and F. Hall. 1994. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1994-3.0, NASA BOREAS Report (EXPLAN 94). Sellers, P., F. Hall, H. Margolis, B. Kelly, D. Baldocchi, G. den Hartog, J. Cihlar, M.G. Ryan, B. Goodison, P. Crill, K.J. Ranson, D. Lettenmaier, and D.E. Wickland. 1995. The boreal ecosystem-atmosphere study (BOREAS): an overview and early results from the 1994 field year. Bulletin of the American Meteorological Society. 76(9):1549-1577. Sellers, P., F. Hall, and K.F. Huemmrich. 1996. Boreal Ecosystem-Atmosphere Study: 1994 Operations. NASA BOREAS Report (OPS DOC 94). Sellers, P. and F. Hall. 1996. Boreal Ecosystem-Atmosphere Study: Experiment Plan. Version 1996-2.0, NASA BOREAS Report (EXPLAN 96). Sellers, P., F. Hall, and K.F. Huemmrich. 1997. Boreal Ecosystem-Atmosphere Study: 1996 Operations. NASA BOREAS Report (OPS DOC 96). Sellers, P.J., F.G. Hall, R.D. Kelly, A. Black, D. Baldocchi, J. Berry, M. Ryan, K.J. Ranson, P.M. Crill, D.P. Lettenmaier, H. Margolis, J. Cihlar, J. Newcomer, D. Fitzjarrald, P.G. Jarvis, S.T. Gower, D. Halliwell, D. Williams, B. Goodison, D.E. Wickland, and F.E. Guertin. 1997. BOREAS in 1997: Experiment Overview, Scientific Results and Future Directions. Journal of Geophysical Research, 102(D24):28,731-28,770. Soil Classification Working Group (Eds.). 1998. The Canadian System of Soil Classification. 3rd edition. Agriculture and Agri-Food Canada Publication 1646. 187 pp. Research Branch, Agriculture and Agri-Food Canada, National Research Council of Canada, Ottawa, Ontario. Thomas, R.L., R.W. Sueurd, and J.P. Moyer. 1967. Comparison of conventional and automated procedures for nitrogen, phosphorus and potassium analysis of plant material using a single digest. Agron. J. 99: 240-243. Tiessen, H., T.L. Roberts, and J.W.B. Stewart. 1983. Carbonate analysis in soils and minerals by acid digestion and two-endpoint titration. Commun. Soil Sci. Plant Anal. 14: 161-166. Veldhuis, H. 1995. Soils of Tower Sites and Super Site, Northern Study Area, Thompson, Manitoba, Canada. BOREAS Project Soils Report for NSA. Veldhuis, H. and G. Rapalee. 1999. Soil carbon stocks and distribution in soil and landscapes of the Glacial Lake Agassiz basin, north-central Manitoba. In Proceedings of 42nd Annual Manitoba Soil Science Society Meeting, Winnipeg MB. 181-188. 17.3 Archive/DBMS Usage Documentation None. 18. Glossary of Terms None. 19. List of Acronyms ASCII - American Standard Code for Information Interchange BOREAS - BOReal Ecosystem-Atmosphere Study BORIS - BOREAS Information System CEC - Cation Exchange Capacity DAAC - Distributed Active Archive Center EC - Electric Conductivity EOS - Earth Observing System EOSDIS - EOS Data and Information System GSFC - Goddard Space Flight Center IC - Inorganic Carbon NASA - National Aeronautics and Space Administration NIST - National Institute of Standards and Technology NSA - Northern Study Area OA - Old Aspen OBS - Old Black Spruce OC - Organic Carbon OJP - Old Jack Pine ORNL - Oak Ridge National Laboratory PANP - Prince Albert National Park PI - Principal Investigator SSA - Southern Study Area TC - Total Carbon TE - Terrestrial Ecology URL - Uniform Resource Locator YJP - Young Jack Pine 20. Document Information 20.1 Document Revision Date Written: 01-Jan-1997 Last Revised: 12-Apr-1999 20.2 Document Review Date(s) BORIS Review: 20-Aug-1998 Science Review: 14-Jul-1998 20.3 Document ID 20.4 Citation Please contact Hugo Veldhuis before publishing any results that are based on these data. 20.5 Document Curator 20.6 Document URL KEYWORDS BULK DENSITY CATION EXCHANGE CAPACITY CARBON EXCHANGEABLE CATIONS MOISTURE RETENTION PH SOIL TE20_NSA_Soil_Lab.doc 05/07/99