Precommercial thinning direct-seeded longleaf pine on a medium site

Metadata:

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

These data were checked for basic accuracy and consistency using programs to check for things like diameter at breast height or height going down and number of trees going up. When issues were found, data were checked against original datasheets and adjustments made when possible. There is a variable in the data (error) that indicates potential problems that could not be fixed.

In checking the data, it was also observed that sometimes there are more trees at a subsequent date than the current date. This can be attributed to missed trees at the earlier date and sometimes trees that were thought to be dead surviving.

It is also important to note that there was no specific indicator of species in any of the data and related files, so all are assumed to be longleaf pine.

Logical_Consistency_Report:

See accuracy section.

Completeness_Report:

Not all variables were measured at all times, but all recorded data are included. Blank cells denote missing data.

Plots 15 and 24 were lost to southern pine beetle in 1993.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

See process steps for information related to accuracy of plot locations.

Lineage:

Methodology:

Methodology_Type: Field

Methodology_Description:

BACKGROUND

The area for this study is on the Longleaf Tract on the Palustris Experimental Forest in Rapides Parish, Louisiana. Site quality is estimated to be average for longleaf pine. The area was direct-seeded in December 1961. Initial establishment was considered good, but the following summer seedling mortality was heavy, so the area was reseeded in December 1962. Some seedlings in later years became infected with brown spot needle disease and multiple attempts were made to try to treat this using different spraying techniques.


STUDY DESIGN

The purpose of this study was to determine the effects of precommercial thinning in a dense young longleaf pine stand that was established by direct seeding on a medium site.

There were six treatments replicated four times in a randomized block design where treatments included: 1) thinning to 3000 trees per acre (TPA), 2) thinning to 1500 TPA, 3) thinning to 1000 TPA, 4) thinning to 750 TPA, 5) thinning to 500 TPA, and 6) cutting all trees on strips 9.9 feet wide leaving 3.3 foot-wide unthinned swaths with about 1500 trees per gross acre.

Prior to application of thinning (1968), the planned plots were inventoried for the number of trees using 25 milacre plots per study plot. Thinning treatments were applied in January and February of 1969. Initial measurements were taken in March 1969, but they are just counts of trees by height class. Plots were then remeasured at 5-year intervals. The data included in this data publication include approximate age of stand and diameter at breast height for every tree in each plot. Also included for a subset of trees each year is: height to base of live crown, tree height, crown class, bark thickness in two directions, and height of trees to 4 different outside bark diameters (2, 4, 6, and 8 inches). Height sample trees were selected by measuring every nth tree in a given diameter class. Coordinates for trees were first recorded in 2019 so only trees surviving until that time have coordinates.

Diameter at breast height (dbh) was measured with a diameter tape. Height was first measured with a teletop dendrometer, but later measurements were done with a Criterion laser device.

For more details see methodology citations.

Methodology_Citation:

Citation_Information:

Originator: Lohrey, Richard E.

Publication_Date: 1969

Title:

Establishment Report: Precommercial thinning direct-seeded longleaf pine on a medium site

Geospatial_Data_Presentation_Form: document

Publication_Information:

Publication_Place: Pineville, LA

Publisher: USDA Forest Service, Southern Research Station, RWU-1102

Other_Citation_Details:

(File included in data publication download: \Supplements\Establishment_Report_320.pdf)

Process_Step:

Process_Description:

There are plot location maps in the establishment report, but they are only approximate and take some effort to convert to on-the-ground locations. GPS coordinates were taken of these plots but true plot center is no longer marked so these coordinates will get you to the plot, but may not represent the exact plot center location. These coordinates were transferred to ArcMap and some adjustments were made to place plots closer to the grid they were supposed to be in. All of the measurement plots are 0.1 acres in size with a 33-foot buffer around each central plot so that the gross plots take up 0.4 acres.

Process_Date: Unknown

Spatial_Data_Organization_Information:

Direct_Spatial_Reference_Method: Vector

Point_and_Vector_Object_Information:

SDTS_Terms_Description:

SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains

Point_and_Vector_Object_Count: 24

Spatial_Reference_Information:

Horizontal_Coordinate_System_Definition:

Planar:

Map_Projection:

Map_Projection_Name: NAD 1983 StatePlane Louisiana North FIPS 1701 Feet

Lambert_Conformal_Conic:

Standard_Parallel: 31.16666666666667

Standard_Parallel: 32.66666666666666

Longitude_of_Central_Meridian: -92.5

Latitude_of_Projection_Origin: 30.5

False_Easting: 3280833.333333333

False_Northing: 0.0

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair

Coordinate_Representation:

Abscissa_Resolution: 0.000000028043156685697574

Ordinate_Resolution: 0.000000028043156685697574

Planar_Distance_Units: foot_us

Geodetic_Model:

Horizontal_Datum_Name: D North American 1983

Ellipsoid_Name: GRS 1980

Semi-major_Axis: 6378137.0

Denominator_of_Flattening_Ratio: 298.257222101

Entity_and_Attribute_Information:

Detailed_Description:

Entity_Type:

Entity_Type_Label: study320.csv

Entity_Type_Definition:

Tree measurements recorded every 5 years starting in 1974 on direct-seeded longleaf pine plots where trees were thinned in 1969 using several different levels of thinning (Study 3.20).

Entity_Type_Definition_Source:

producer defined

Attribute:

Attribute_Label: plot

Attribute_Definition:

The plot number within the study.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: block

Attribute_Definition:

The block number. There are 4 blocks in this study.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: latitude

Attribute_Definition:

The latitude in decimal degrees.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: longitude

Attribute_Definition:

The longitude in decimal degrees. West longitude is negative which includes all of my plots.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: elevation

Attribute_Definition:

Elevation above sea level in feet obtained from a topographic map.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: soil

Attribute_Definition:

Soil type

Attribute_Definition_Source:

Soil Survey of Rapides Parish

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: BeB

Enumerated_Domain_Value_Definition:

Beauregard silt loam 1-3% slope

Enumerated_Domain_Value_Definition_Source:

Soil Survey of Rapides Parish

Enumerated_Domain:

Enumerated_Domain_Value: GrC

Enumerated_Domain_Value_Definition:

Gore very fine sandy loam 1-5% slope

Enumerated_Domain_Value_Definition_Source:

Soil Survey of Rapides Parish

Enumerated_Domain:

Enumerated_Domain_Value: MaC

Enumerated_Domain_Value_Definition:

Malbis fie sandy loam 1-5% slope

Enumerated_Domain_Value_Definition_Source:

Soil Survey of Rapides Parish

Attribute:

Attribute_Label: treatment

Attribute_Definition:

thinning treatment

Attribute_Definition_Source:

producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition:

thin to 3,000 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition:

thin to 1,500 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 3

Enumerated_Domain_Value_Definition:

thin to 1,000 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 4

Enumerated_Domain_Value_Definition:

thin to 750 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 5

Enumerated_Domain_Value_Definition:

thin to 500 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 6

Enumerated_Domain_Value_Definition:

mow a 9.9-foot strip leaving 3.3-foot strip unthinned

Enumerated_Domain_Value_Definition_Source:

producer defined

Attribute:

Attribute_Label: init_tpa

Attribute_Definition:

The initial trees per acre on the plot.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: thin_tpa

Attribute_Definition:

The trees per acre left after thinning treatment.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: treeno

Attribute_Definition:

The tree number on the plot. Sometimes the tree numbers start at 1, but often they start at a higher number. Originally only trees that were part of the height sample had tree numbers. Starting at age 52 numbers were assigned to all trees in plot 9 and above. By age 57 all trees on all plots were assigned numbers.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: x-coord

Attribute_Definition:

The x coordinate of a tree in feet where the plot center is 0,0. Since plot center and corner markers are no longer present, the center is approximate, but the tree positions are relative to each other. The X axis is magnetic East-West.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: y-coord

Attribute_Definition:

The y coordinate of a tree in feet where the plot center is 0,0. Since plot center and corner markers are no longer present, the center is approximate, but the tree positions are relative to each other. The Y axis is magnetic North-South.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: age

Attribute_Definition:

The age of the stand in years, not necessarily the age of the individual tree.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: year

Attribute_Definition:

The year of measurement. This is always the year of the spring dormant season. If the plot was actually measured in the fall then this is the following year.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: dbh

Attribute_Definition:

The diameter at 4.5 feet above ground in inches.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: hblc

Attribute_Definition:

The height to the base of the live crown (hblc) in feet.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: totht

Attribute_Definition:

The total height of the tree in feet.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: crcl

Attribute_Definition:

The crown class of a tree.

Attribute_Definition_Source:

producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition:

Dominant

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition:

Codominant

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 3

Enumerated_Domain_Value_Definition:

Intermediate

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 4

Enumerated_Domain_Value_Definition:

Suppressed

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 5

Enumerated_Domain_Value_Definition:

Dominant or Codominant

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 6

Enumerated_Domain_Value_Definition:

Intermediate or Suppressed

Enumerated_Domain_Value_Definition_Source:

producer defined

Attribute:

Attribute_Label: ha10-ha02

Attribute_Definition:

Height in feet to a given diameter on the tree. (i.e., ha04 is the height to a 4-inch outside bark diameter)

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: cw1-cw2

Attribute_Definition:

The crown width of trees in two perpendicular directions. This was only measured at age 12 and there are no field notes to say if this is radius or diameter.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: barkt1-barkt2

Attribute_Definition:

The bark thickness in two directions in inches.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: notes1, notes2

Attribute_Definition:

A codified representation of the notes that were scribbled on plot data sheets. They might be useful to explain odd data points of to exclude certain trees from selected calculations (i.e., trees with bad tops should not be used for site index calculations)

Attribute_Definition_Source:

producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 1

Enumerated_Domain_Value_Definition:

dead

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 2

Enumerated_Domain_Value_Definition:

dead top

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 3

Enumerated_Domain_Value_Definition:

off plot

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 4

Enumerated_Domain_Value_Definition:

dying

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 5

Enumerated_Domain_Value_Definition:

decreasing dbh (probably really happening due to growth conditions)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 6

Enumerated_Domain_Value_Definition:

dead due to suppression

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 7

Enumerated_Domain_Value_Definition:

dead due to insects

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 8

Enumerated_Domain_Value_Definition:

dead due to ice

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 9

Enumerated_Domain_Value_Definition:

decreasing height (probably real due to growth condtions)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 10

Enumerated_Domain_Value_Definition:

insects

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 12

Enumerated_Domain_Value_Definition:

bark beetles

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 14

Enumerated_Domain_Value_Definition:

Southern pine beetle

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 20

Enumerated_Domain_Value_Definition:

diseases

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 21

Enumerated_Domain_Value_Definition:

fungi

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 22

Enumerated_Domain_Value_Definition:

canker/catface

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 30

Enumerated_Domain_Value_Definition:

fire

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 40

Enumerated_Domain_Value_Definition:

animals

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 41

Enumerated_Domain_Value_Definition:

woodpecker

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 50

Enumerated_Domain_Value_Definition:

weather

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 51

Enumerated_Domain_Value_Definition:

windthrow (uprooted)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 52

Enumerated_Domain_Value_Definition:

lightning

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 55

Enumerated_Domain_Value_Definition:

ice damage

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 60

Enumerated_Domain_Value_Definition:

vegetation

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 61

Enumerated_Domain_Value_Definition:

still in grass stage (longleaf pine)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 70

Enumerated_Domain_Value_Definition:

people

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 71

Enumerated_Domain_Value_Definition:

paint scraped at dbh point

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 72

Enumerated_Domain_Value_Definition:

tree marked with tag nailed to tree

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 73

Enumerated_Domain_Value_Definition:

tree marked with pin in ground near tree

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 74

Enumerated_Domain_Value_Definition:

no tag

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 75

Enumerated_Domain_Value_Definition:

out of row

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 76

Enumerated_Domain_Value_Definition:

dbh is an estimate since it was not measured

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 77

Enumerated_Domain_Value_Definition:

tree ID discrepancy, try to resolve

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 78

Enumerated_Domain_Value_Definition:

not main species in study (identify correct species)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 80

Enumerated_Domain_Value_Definition:

logging, cut and used

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 81

Enumerated_Domain_Value_Definition:

logging damage

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 82

Enumerated_Domain_Value_Definition:

logging, cut and used for research

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 83

Enumerated_Domain_Value_Definition:

missing

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 84

Enumerated_Domain_Value_Definition:

ingrowth tree (once tagged it is always true for that tree)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 90

Enumerated_Domain_Value_Definition:

unspecified bad tree

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 91

Enumerated_Domain_Value_Definition:

form damage

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 92

Enumerated_Domain_Value_Definition:

forking (FK)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 93

Enumerated_Domain_Value_Definition:

bad top (BT)

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 94

Enumerated_Domain_Value_Definition:

broken off (no top, NT) includes broke top where there is still a crown

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 95

Enumerated_Domain_Value_Definition:

leaning

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 96

Enumerated_Domain_Value_Definition:

bent

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 97

Enumerated_Domain_Value_Definition:

bent over

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 98

Enumerated_Domain_Value_Definition:

laying on ground

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 99

Enumerated_Domain_Value_Definition:

cavity tree

Enumerated_Domain_Value_Definition_Source:

producer defined

Attribute:

Attribute_Label: error

Attribute_Definition:

During error checking of the data many odd things like decreasing diameters were found. Rather than fictionalize the data, if we could not determine what the true value should be, we simply flagged that measurement with one of the codes below. Trees flagged with these codes may or may not be measured incorrectly. They could have lost diameter or height due to breakage of bark sloughing, but they could be problems and are thus flagged.

1 = height accumulation (taper, height to a given diameter) problem
2 = height to base of live crown problem
3 = height accumulation and height to base of live crown problem
4 = total height problem
5 = height accumulation and/or total height problem
6 = total height and height to base of live crown problem
7 = height accumulation, height to base of live crown, and/or total height problem
8 = dbh problem
9 = dbh problem and height accumulation problem
10 = dbh problem and height to base of live crown problem
11 = dbh problem and hblc problem and height accumulation problem
12 = dbh problem and total height problem
13 = dbh problem and total height problem and height accumulation problem
14 = dbh problem and total height problem and hblc problem
15 = dbh problem and total height problem and hblc problem and height accumulation problem
16 = ingrowth tree (appeared from nowhere). An ingrowth tree is only tagged when it first appears.

This coding is based on a binary number where moving from least significant to most significant we have one bit for each of height accumulation problems, height to base of live crown problems, total height problems, and dbh problems. Moving back into base 10 numbers, we have:

1 = height accumulation problem
2 = height to base of live crown problem
4 = total height problems
8 = dbh problems

Multiple problems are just the sum of the 4 possible codes above. SAS has some functions that make it fairly easy to extract these error conditions from this single number. The following is an example of one way to do this:
errord=0;errort=0;errorh=0;errorv=0;
if error= '.1...'b then errord=1;
if error= '..1..'b then errort=1;
if error= '...1.'b then errorh=1;
if error= '....1'b then errorv=1;

Attribute_Definition_Source:

producer defined

Detailed_Description:

Entity_Type:

Entity_Type_Label: study_320.shp

Entity_Type_Definition:

Approximate location of each plot in Study 3.20.

Entity_Type_Definition_Source:

producer defined

Attribute:

Attribute_Label: FID

Attribute_Definition:

Internal feature number.

Attribute_Definition_Source:

Esri

Attribute:

Attribute_Label: Shape

Attribute_Definition:

Feature geometry.

Attribute_Definition_Source:

Esri

Attribute:

Attribute_Label: Name

Attribute_Definition:

study-plot

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: lat

Attribute_Definition:

latitude (decimal degrees)

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: long

Attribute_Definition:

longitude (decimal degrees)

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: treatment

Attribute_Definition:

thinning treatment

Attribute_Definition_Source:

producer defined

Attribute_Domain_Values:

Enumerated_Domain:

Enumerated_Domain_Value: 500

Enumerated_Domain_Value_Definition:

thin to 500 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 750

Enumerated_Domain_Value_Definition:

thin to 750 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 1000

Enumerated_Domain_Value_Definition:

thin to 1,000 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 1500

Enumerated_Domain_Value_Definition:

thin to 1,500 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: 3000

Enumerated_Domain_Value_Definition:

thin to 3,000 trees per acre, selectively

Enumerated_Domain_Value_Definition_Source:

producer defined

Enumerated_Domain:

Enumerated_Domain_Value: strip

Enumerated_Domain_Value_Definition:

mow a 9.9-foot strip leaving 3.3-foot strip unthinned

Enumerated_Domain_Value_Definition_Source:

producer defined

Attribute:

Attribute_Label: plot

Attribute_Definition:

plot number (1-24)

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: study

Attribute_Definition:

study number (3.20)

Attribute_Definition_Source:

producer defined

Detailed_Description:

Entity_Type:

Entity_Type_Label: PreTreat_1968.csv

Entity_Type_Definition:

Data collected in 1968 before the study treatments were applied, which includes a count of all trees found in each milacre plot and a count of trees found that had started height growth.

Entity_Type_Definition_Source:

producer defined

Attribute:

Attribute_Label: plot

Attribute_Definition:

The plot number within the study.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: all_#

Attribute_Definition:

The number of all trees found in the specified milacre plot: # = 1-25 in 1968.

Attribute:

Attribute_Label: htgro_#

Attribute_Definition:

The number of trees that had started height growth in the specified milacre plot: # = 1-25 in 1968. (Longleaf pine has a grass stage where there is no height growth and this variable indicates trees that have made the transition to height growth.)

Detailed_Description:

Entity_Type:

Entity_Type_Label: PostTreat_1969.csv

Entity_Type_Definition:

Data collected in 1968 before the study treatments were applied, which includes a count of all trees found in each milacre plot and a count of trees found that had started height growth.

Entity_Type_Definition_Source:

producer defined

Attribute:

Attribute_Label: plot

Attribute_Definition:

The plot number within the study.

Attribute_Definition_Source:

producer defined

Attribute:

Attribute_Label: ht_##

Attribute_Definition:

The number of trees in each 0.5-foot height class (in feet) post-treatment, in 1969. Height classes (##) are denoted without the decimal point, therefore ## = 05, 10, 15, 20, … 135 represent height classes: 0.5, 1.0, 1.5, 2.0, …, 13.5. (I.e., ht_05 = number of trees with a height ≤ 0.5 feet; ht_10 = number of trees in height class 1.0, where height > 0.75 feet and ≤ 1.25 feet, etc.)

Overview_Description:

Entity_and_Attribute_Overview:

Below you will find a list and description of the files included in this data publication.

DATA FILES (4)
Descriptions for the variables included in these data files can be found in the Entity and Attribute Detailed section above. Descriptions for the comma-delimited ASCII text files can also be found in \Supplements\Data_and_Study_Descriptions.pdf.

1. \Data\PostTreat_1969.csv: Comma-delimited ASCII text (CSV) file containing data collected after the stand was treated, but before detailed measurements began. It has a row for each plot followed by a count of trees on each plot in each height class. The height classes missing the decimal point since that does not work well in variable naming. Thus ht_05 is a count of trees in the 0.5-foot height class and ht_135 is the count of trees in the 13.5-foot height class.

2. \Data\PreTreat_1968.csv: CSV file containing data collected before the study treatments were applied. There is one row for each plot with columns for each of the 25 milacre plots which were used to sample the stand. Each milacre has a count of all trees found (all_?) and a count of trees found that had started height growth (htgro_?).

3. \Data\study320.csv: CSV file containing tree measurements recorded on direct-seeded longleaf pine plots on the Palustris Experimental Forest in Rapides Parish, Louisiana where six different thinning treatments were applied in 1969 (Study 3.20). Data such as diameter at breast height, tree height, height to base of life crown and crown class were recorded in 1974 and every 5 years until the present.

4. \Data\PlotLocations\study_320.shp: Shapefile (and associated files) containing approximate location of each plot in Study 3.20. This file provides the plot "Name", which is the plot number.


SUPPLEMENTAL FILES (4)

1. \Supplements\Data_and_Study_Description.pdf: Portable Document Format (PDF) file containing a short summary of Study 3.20 and a complete list and description of the variables included in the data file study320.csv.

2. \Supplements\Establishment_Report_320.pdf: PDF file containing the actual establishment report "Precommercial thinning direct-seeded longleaf pine on a medium site," which includes maps and description of the experiment.

3. \Supplements\Progress_Report_320.pdf: PDF file containing a progress report as of 1975 for this study, "Precommercial thinning direct-seeded longleaf pine on a medium site." It includes much of the establishment report and also some preliminary results.

4. \Supplements\Study_320_Plot_Map.pdf: PDF file containing a printed map of the plot layout. It is mainly a drawing of what is in the shapefile with some background graphics.

Entity_and_Attribute_Detail_Citation:

none provided

Metadata_Reference_Information:

Metadata_Date: 20211109

Metadata_Contact:

Contact_Information:

Contact_Organization_Primary:

Contact_Organization: USDA Forest Service, Southern Research Station, RWU-4158

Contact_Person: Daniel Leduc

Contact_Position: Statistician

Contact_Address:

Address_Type: mailing and physical

Address: 2500 Shreveport Hwy

City: Pineville

State_or_Province: LA

Postal_Code: 71360

Country: USA

Contact_Voice_Telephone: 318-473-7243

Contact_Electronic_Mail_Address: daniel.leduc@usda.gov

Metadata_Standard_Name: FGDC Biological Data Profile of the Content Standard for Digital Geospatial Metadata

Metadata_Standard_Version: FGDC-STD-001.1-1999