LUQ LTER DATA SETS DOCUMENTATION FORM

ON-LINE VERSION

A DATA SET is a series of observations collected by the same methodology. Each data set should have documentation sufficient for someone unfamiliar with the research to replicate the study. Data sets may be broken into subsets (data files) that are discrete in space and time, in that order. The documentation for a data set should include all spatial and temporal subdivisions of the data.

(Data, Abstract, Methods, Variables)

NOTES:

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PERSON(S) COMPLETING THIS FORM:	E-MAIL ADDRESS:
Jeff Merriam	jeff.merriam@unh.edu

DATA SET IDENTIFIER: Chemistry of soil solution collected from zero tension lysimeters in the Canopy Trimming Experiment (CTE) plots

PROJECT TITLE : Canopy Trimming Experiment soil solution chemistry

PROJECT DESCRIPTION : Soil solution was collected monthly from zero tension lysimeters installed in the CTE plots. Sampling began prior to cutting the canopy and continue to the present.

LTER CORE AREAS: Annotate all that apply (See online list)

Inorganic nutrients

disturbance

LEF LTER 1 RESEARCH TOPIC: (Annotate all that apply) (See online list)

We define a data file as a component of a data set. A data set can have only one data file or more. Basically, different data files have different data structures or format.
DATA SET FILES (SUBSETS):

Data File No.	Data File Identifier	On-Line Filename	Starting Date	Periodicity of sample	End Period
1	Lysimeter Chemistry	CTE-Lysimeter.txt	28-Jan-2003	monthly	28-Nov-2007

RESEARCH LOCATION: Canopy Trimming Experiment Plots. Block A: 30+ m West of western edge of Big Grid, on North and South side of Prieta stream, near Vogt old plots. Block B: 30+ m South of Big Grid, all plots along Oxcart Trail. Block C: 30+ m West of SE corner of Big Grid.

INVESTIGATORS:

PRINCIPAL INVESTIGATORS	E-MAIL ADDRESS:
William H. McDowell	wmcdowell@lternet.edu

Other Researchers	E-MAIL ADDRESS:

CONTACT PERSONS	Phone Number (Include area code)	E-MAIL ADDRESS:

SOURCE OF FUNDING (SPONSOR): NSF-LTER and UPR

DATA SET ABSTRACT: Soil solution chemistry

DATA SET METHODS: Soil solution was collected approximately every month from the zero tension lysimeters within the CTE plots. Samples were filtered through a pre-combusted GF/F filter, frozen and shipped to the Water Quality Analysis Lab for analysis at the University of New Hampshire, Durham, NH.

Analytical Techniques
Cl - liquid chromatography with conductivity detection
NO₃-N - liquid chromatography with conductivity detection
SO₄-S - liquid chromatography with conductivity detection
Na, K, Mg, and Ca - liquid chromatography with conductivity detection
NH₄-N - automated colorimetric analysis (phenolhypochlorite)
PO₄-P - automated colorimetric analysis (molybdate blue)
DOC - high temperature catalytic oxidation
TDN - high temperature catalytic oxidation with chemiluminescent detection
SiO₂ - automated colorimetric analysis (molybdate blue)
DON - by difference (TDN - NO₃-N - NH₄-N)

REFERENCES :

CROSS-REFERENCES (other data sets related to this one):

SAMPLE LOCATION :

STORAGE SITES (of data files):

INVESTIGATOR'S ASSIGNED KEYWORDS: lysimeter, soil solution chemistry, chloride, nitrate, sulfate, sodium, potassium, magnesium, calcium, ammonium, ortho-phosphate, soluble reactive phosphate, dissolved organic carbon, total dissolved nitrogen, silica, dissolved organic nitrogen

LEF LTER OFFICIAL KEYWORDS (See table ):

PUBLICATIONS :

DISSEMINATION :

RESTRICTED UNRESTRICTED X

REASONS TO RESTRICT DATA IN THIS DATA SET BEYOND ITS TWO: YEAR POLICY PERIOD*:

*WILL HAVE TO BE APPROVED BY LTER PRINCIPAL INVESTIGATORS: N. BROKAW, A. LUGO

FILING

_X_ "File" copy only : Data Management will only file an electronic copy of the data file and its documentation
___ "Enter" data on-line : Data Management will be in charge of entering the data on computer files (Contact Eda C. Meléndez)

SITES DESCRIPTIONS:

CTE experimental blocks are located in El Verde (18"19'N, 65'49'W), the site of a 70-ha research forest that is 350-500m a.s.1. and receives a mean annual precipitation of 3460 mm; mean monthly temperatures range between 21 and 25 oC (Brown et al. 1983). The vegetation is classified as subtropical wet forest (Ewe1 & Whitmore 1973) and lies in the tabonuco zone which is dominated by Dacryodes excelsa Vahl. (tabonuco) and Prestoea montana (R. Grah.) Nichols (sierra palm).

Geographical positional system (GPS) Coordinates for each location:

location	latitude	longitude

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	1	1	1	1
Abbreviation Abbreviation (as it appears on the data file)	UNH	Sample_Name	Collection_Date	Plot
NAME OF VARIABLE	Code for UNH database	Lysimeter Number	Collection Date	Plot Identifier
DEFINITION OF VARIABLE	Unique 5 digit number Assigned at UNH lab. Primary key in UNH database	Number assigned to the lysimeter	Date of sample collection	Name given to the Plot. The letter (A, B, C, D) indicates the experimental Block. The number indicates the Plot within the Block.
UNIT
PRECISION
RANGE OR LIST OF VALUES		LYS01, LYS02, LYS03, LYS04, LYS05, LYS06, LYS07, LYS08, LYS09, LYS10, LYS11, LYS12, LYS13, LYS14, LYS15, LYS16, LYS17, LYS18, LYS19, LYS20, LYS21, LYS22, LYS23, LYS24, LYS25, LYS26, LYS27, LYS28, LYS29, LYS30, LYS31, LYS32, LYS33, LYS34, LYS35, LYS36		A1, A2, A3, A4, B1, B2, B3, B4, C1, C2, C3, C4, D1, D2, D3, D4
DATA TYPE	integer	alphanumeric	datetime	alphanumeric
MISSING DATA CODES

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	1	1	1	1
Abbreviation Abbreviation (as it appears on the data file)	Treatment	Cl	NO3-N	SO4-S
NAME OF VARIABLE	Experimental Manipulation	Chloride	Nitrate	Sulfate
DEFINITION OF VARIABLE	What was done to the plot as part of the experiment	Concentration of Chloride (Cl^-) in soil solution. Values < 0.1 indicate a “no detect”. Empty cell means missing datum.	Concentration of Nitrate (NO3-N) in soil solution. Values < 0.005 indicate a “no detect”. Empty cell means missing datum.	Concentration of Sulfate (SO4-S)in soil solution. values < 0.05 indicate a “no detect”. Empty cell means missing datum.
UNIT		milligramsPerLitter	milligramsPerLitter	milligramsPerLitter
PRECISION		10%	5%	10%
RANGE OR LIST OF VALUES	Control, Trim+Removal, Trim+Detritus, Control+Detritus,	0.1 to 64.3, < 0.1 = “no detect”	0.005 to 7.383, < 0.005 = “no detect”	0.05 to 8.03, < 0.05 = “no detect”
DATA TYPE	alphanumeric	decimal	decimal	decimal
MISSING DATA CODES

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	1	1	1	1
Abbreviation Abbreviation (as it appears on the data file)	Na	K	Mg	Ca
NAME OF VARIABLE	Sodium	Potassium	Magnesium	Calcium
DEFINITION OF VARIABLE	Concentration of Sodium (Na⁺) in soil solution. Empty cell means missing datum.	Concentration of Potassium (K⁺) in soil solution. Empty cell means missing datum.	Concentration of Magnesium (Mg²⁺)in soil solution. Empty cell means missing datum.	Concentration of Calcium (Ca²⁺)in soil solution. Empty cell means missing datum.
UNIT	milligramsPerLitter	milligramsPerLitter	milligramsPerLitter	milligramsPerLitter
PRECISION	10%	10%	10%	10%
RANGE OR LIST OF VALUES	0.1 to 31.89 values < 0.1 indicate a “no detect”	0.1 to 18.09 values < 0.1 indicate a “no detect”	0.05 to 9.40 values < 0.05 indicate a “no detect”	0.1 to 17.06 values < 0.1 indicate a “no detect”
DATA TYPE	decimal	decimal	decimal	decimal
MISSING DATA CODES	-9999.00	-9999.00	-9999.00	-9999.00

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	1	1	1	1
Abbreviation Abbreviation (as it appears on the data file)	NH4-N	PO4-P	DOC	TDN-N
NAME OF VARIABLE	Ammonium	Ortho-phosphate, Soluble Reactive Phosphate	Dissolved Organic Carbon	Total Dissolved Nitrogen
DEFINITION OF VARIABLE	Concentration of Ammonium (NH₄-N)in soil solution. Empty cell means missing datum.	Concentration of soluble reactive phosphate (PO₄-P) in soil solution. Empty cell means missing datum.	Concentration of Organic Carbon in a filtered sample of soil solution. Empty cell means missing datum.	Concentration of all Nitrogen in a filtered sample of soil solution. Empty cell means missing datum.
UNIT	milligramsPerLitter	milligramsPerLitter	milligramsPerLitter	milligramsPerLitter
PRECISION	10%	10%	10%	10%
RANGE OR LIST OF VALUES	5 to 46131 values < 5 indicate a “no detect”	5 to 4130 values < 5 indicate a “no detect”	0.07 to 69.11 values < 0.07 indicate a “no detect”	0.05 to 38.19 values < 0.05 indicate a “no detect”
DATA TYPE	decimal	decimal	decimal	decimal
MISSING DATA CODES	-9999.00	-9999.00	-9999.00	-9999.00

VARIABLES (ATTRIBUTES):

File Name or # above (all in which the variable appears)	1	1	1
Abbreviation Abbreviation (as it appears on the data file)	SiO2	DON	Volume
NAME OF VARIABLE	Silica	Dissolved Organic Nitrogen	Volume
DEFINITION OF VARIABLE	Concentration of Silica (SiO₂) in soil solution. Empty cell means missing datum.	Concentration of Organic Nitrogen in a filtered sample of soil solution. DON =TDN – NO₃N – NH₄N. Empty cell means missing datum.	Volume of solution collected from the lysimeter. Empty cell means missing datum.
UNIT	milligramsPerLitter	milligramsPerLitter	liter
PRECISION	10%	10%	0.01
RANGE OR LIST OF VALUES	0.05 to 113.12, < 0.05 = "no detect”	0.01 to 1.68, < 0.01 = a “no detect”	0.01 to 2.6
DATA TYPE	decimal	decimal	decimal
MISSING DATA CODES	-9999.00	-9999.00	-9999.00

COMPUTATIONAL METHODS:

Variable Name	Formula

FOR DATA MANAGER USE ONLY

DATE OF LAST REVIEW: June 2, 2009

DATE OF LAST ENTRY : October 29, 2007

STAGE OF DATA SET MANAGEMENT (dates) :

RECEIVED: May 28, 2009
ENTERED: May 28, 2009
FILED ON-LINE: May 28, 2009
REVIEWED BY RESEARCHER:

FILING MEDIA :

NAME OF DOCUMENTATION FILE : lterdb166.htm, CTE Lysimeter Chemistry Metadata.htm
NAME OF ON - LINE CATALOG : LTERDBAS
RECORD # : 166
DOCUMENT TYPE : digital
PRIORITY TO BE ENTERED : N/A

Rev. date of this form: 28 July 200/ 15 July 2001/June 9, 2003/March 16, 2004/12 April 2005/ 8 November 2005