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East Texas Forestlands Curtis L. VanderSchaaf Forest Resource Analyst [email protected] March 2010 A copy of the East Texas Forestlands factsheet can be downloaded from: http://txforestservice.tamu.edu/EconDev/Pubs

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Page 1: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

East Texas Forestlands

Curtis L. VanderSchaafForest Resource Analyst

[email protected]

March 2010A copy of the East Texas Forestlands factsheet can be downloaded from:

http://txforestservice.tamu.edu/EconDev/Pubs

Page 2: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

East Texas ForestlandsSeveral sources of data were used to produce the East Texas Forestlands factsheet and slidethe East Texas Forestlands factsheet and slide presentation:

d lFIA – Forest Inventory and Analysis

NWOS – National Woodland Owner Survey

Harvest Trends

Timber Price TrendsTimber Price Trends

Page 3: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

East Texas ForestlandsForest Inventory and AnalysisForest Inventory and Analysis

The FIA is a national program designed to quantify the amount of resources in forestlands.

Texas Forest Service in conjunction with the USDA Forest Service annually measures 20% of all plots establishedj y p

in East Texas. 

Variables include total height, diameter, volume, biomass, etc.

All FIA plots in East Texas are measured over a 5‐year period.

Page 4: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

East Texas ForestlandsNWOS Harvest Trends and Texas Timber Price TrendsNWOS, Harvest Trends, and Texas Timber Price Trends

National Woodland Owner Survey – NWOS assesses forestland owner characteristics.  Data were obtained from questionnaires sent out from 2002 to 2006 to an area weighted sample of 857 East Texas family forest land owners.  There was a 45 percent return rate.

Harvest Trends ‐ Texas Forest Service conducts an annual assessment of the amount of primary wood products produced in the state and the amount of stumpage purchased by county and exported to other states to produce primary wood products.

Texas Timber Price Trends – Texas Forest Service produces a bi‐monthly p ypublication reporting average prices paid for standing timber, commonly called stumpage price.

Page 5: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

East Texas ForestlandsForestland versus TimberlandForestland versus Timberland

Forestland – land that is at least 10 percent stocked by forest trees of any size or h h b l 10% k d i h d l d l d fthat has been at least 10% stocked in the past, and not currently developed for a nonforest use

Timberland forestland that is producing or capable of producing in excess of 20Timberland – forestland that is producing or capable of producing in excess of 20 cubic feet per acre per year

All timberland is forestland.

Examples of forestland that WOULD NOT BE classified as timberland are an extremely dry sandy, low fertility site or a marshland which produce less than 20 cubic feet/acre/yr of woody volume growth. 

Failing to be classified as timberland does not relate to current stocking but rather potential stocking and site productivity.

Page 6: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

ForestlandAcres

Percent forestland by county, 2008

Area of timberland, 1992‐2008

11

11.5

12

illion acres

Forestland makes up about 54 percent of the East Texas region.  

Almost all forestland is timberland (99 t)

10

10.5

1992 2003 2008

Mi

Year

(99 percent).

Nearly 39 percent of the region’s Timberland is located in just 10 of the 43 counties.

Oak pine

Other 3% Eastern redcedar 1%Longleaf‐slash pine 2%

Area of timberland, 2008There were 11,964, 913 acres of timberland estimated in 2008.

Loblolly‐shortleaf pine41%

Lowland hardwoods17%

Oak‐pine13%

Southern pine forests consist primarily of loblolly pine – about half planted and half occurring naturally.

Oak‐hickory24%

Lowland hardwoods consist of the oak‐gum‐cypress and elm‐ash‐cottonwood forest types.

Page 7: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

ForestlandAcres

Acres of timberland planted by species 2008

Region Species AcresLoblolly pine 1,883,074

Area of timberland by forest type and county, 2008

Acres of timberland planted by species, 2008  (Other includes bald cypress, cherrybark oak, longleaf pine, Scotch 

pine and Virginia pine)

Pine Planted Pine Oak‐Pine

Other 17,160Slash pine 104,097

Loblolly pine 882,616Other 18,256

SE Texas

NE Texas

< 2500

2500 to 5000

5000 to 10000

10000 to 20000

Slash pine 9,344

Area of timberland across all forest types by county, 2008Oak‐hickory Oak‐gum‐cypress Elm‐ash‐cottonwood

20000 to 35000

35000 to 50000

50000 to 100000

100000 to 150000

150000 to 200000

< 30000

30000 to 100000

100000 to 150000

150000 t 200000

TimberlandNE Texas

150000 to 200000

200000 to 250000

> 250000

150000 to 200000

200000 to 250000

250000 to 300000

300000 to 350000

350000 to 400000

400000 t 450000400000 to 450000

450000 to 525000

> 525000

SE Texas

Page 8: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

ForestlandOwnership

Other public 3%

Percent forestland by county, 2008 Private owners, consisting of Timber Investment Management Organizations (TIMOs) and Real Estate Investment Trusts (REITs) as well as family forest owners, control 92 percent of the timberland.

National Forest 5%

, p

Questionnaires were sent out from 2002 to 2006 in an area weighted sample of 857 family forest owners.  There was a 45 percent return rate. 

According to survey results timber was harvested on 74 percent of

Private 92%

According to survey results, timber was harvested on 74 percent of      the family forest acreage.

The vast majority of owners possessed small tracts of land while just a few people held large tracts. 

Response by family forest owner (formerly Non‐Industrial Private Forest, or NIPF), 2006

Size of forest

Acres1‐910‐1920 49

5

Ownersthousand percentNumber

Area

680 11914 14

thousand percentAcres346 94 45

55 2631 15

Timber activity

Timber harvestYes

percent

74

Areamillion acres

4.820‐4950‐99100‐1000> 1000

2505 39841 13

914 141125 18

31 1517 811 5~ 1 ‐

No No answer

Harvested past 5 years 2.3

24236

1.50.1

Page 9: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

ForestlandStand Structure

Stand‐product class by survey year, timberland, 1992 to 2008 Stand Structure

5

6

7

cres

1992 2003 2008 Stand‐product class is the same as stand‐size class.

Sawtimber sized stands constitute 52 percent of the region.

0

1

2

3

4

b l b l dl k d

Million ac

p g

Poletimber sized stands constitute 22 percent. 

Sapling‐seedling sized stands make up the remaining 26 percent.  Sawtimber Poletimber Sapling‐seedling Nonstocked

Year

Stand‐diameter by stand‐product class, timberland, 2008

Stand‐product class

Not Determined

0 to     < 5

5 to     < 9

9 to    < 20

20 to      < 40

Sawtimber ‐ 122.8 876.3 4822.5 341.9

thousand acresArea

6163.4

Stand‐diameter class (inches d.b.h.)

Poletimber 103.5 2077.7 433.3 16.3Sapling‐seedling 1933.0 807.0 213.6 22.7Nonstocked 52.4 17.1 9.1 1.5Total 2211.6 3778.1 5478.4 382.4

109.079.46.1

11964.9 114.328.9

2636.93055.7

Sawtimber. As defined by FIA, softwood species 9.0 inches d.b.h and larger and hardwoods 11.0 inches d.b.h. and largerSawtimber. As defined by FIA, softwood species 9.0 inches d.b.h and larger and hardwoods 11.0 inches d.b.h. and larger

Poletimber. As defined by FIA, softwood species 5.0 to 8.9 inches d.b.h. and hardwoods 5.0 to 10.9 inches d.b.h.

Saplings. As defined by FIA, Live trees 1.0 to 4.9 inches d.b.h.

Seedlings. As defined by FIA, live trees < 1.0 inch d.b.h. and ≥ 1 foot tall for hardwoods,  ≥ 6 inches tall for softwoods

Page 10: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

Trees Per AcrePine Planted Pine Oak ‐Pine

None recorded

0 to 200

200 to 400

400 to 600

600 to 800

Oak ‐hickory Oak ‐gum‐cypress Elm‐ash‐cottonwood

800 to 1000

1400 to 1600

1000 to 1200

1200 to 1400

1600 to 1800

1800 to 2000

2000 to 2200

Across all forest types there was an average of 638 trees per acreAcross all forest types, there was an average of 638 trees per acre.

Page 11: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

VolumeStand Structure

Volume in live trees by dbh, timberland 1992 to 2008

0 8

1

1.2

1.4

bic feet

Softwoods

1992 2003 2008 Softwood volume is 9.5 billion cubic feet for live trees.

Hardwood volume is 7 8 billion cubic feet for live trees

timberland, 1992 to 2008

0

0.2

0.4

0.6

0.8

6 8 10 12 14 16 18 20 25 29+

Billio

n cub

Diameter class (inches)

Hardwood volume is 7.8 billion cubic feet for live trees.

0 4

0.6

0.8

1

1.2

on cub

ic feet

Hardwoods

1992 2003 2008

0

0.2

0.4

6 8 10 12 14 16 18 20 25 29+

Billio

Diameter class (inches)

Page 12: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

VolumeAmount

Region Species ft3

L bl ll i 1 642 423 818

Growing stock volume (ft3) on timberland by forest type and county, 2008

Growing stock volume of plantation timberland by species, 2008

Pine Planted Pine Oak ‐Pine

Loblolly pine 1,642,423,818Other 7,602,450Slash pine 148,559,642

Loblolly pine 812,981,142Other 23 063 621

SE Texas

NE Texas Other 23,063,621Slash pine 10,254,287

NE Texas

0 to 75,000,000

75 000 000 to 150 000 000

None recorded

75,000,000 to 150,000,000

150,000,000 to 225,000,000

225,000,000 to 300,000,000

300,000,000 to 375,000,000

375,000,000 to 450,000,000

Oak‐hickory Oak‐gum‐cypress Elm‐ash‐cottonwood

Pine is more heavily concentrated in the southern region while

450,000,000 to 525,000,000

525,000,000 to 600,000,000

600,000,000 to 675,000,000

Growing‐stock trees. Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently or potentially, if too small to qualify as a sawlog. The log(s) must meet dimension and merchantability standards to qualify. Trees must have one‐third of the gross board‐foot volume in sound wood, either currently or potentially.

Pine is more heavily concentrated in the southern region while oak‐hickory is more plentiful in the northern region.

Page 13: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

VolumeChangeg

Growth to removals ratio and average annual live tree (growing stock in parentheses) growth, removals and mortality for timberland

Item Sample estimateLand area (1,000 acres)

Components of change between 2003 and 2008

Item Softwoods Hardwoods

1.17 (1.17) 1.62 (1.69)

million ft 3

Net growth‐to‐removals ratio

removals, and mortality for timberland, 2003 to 2008

Land area (1,000 acres)Forestland 12128.7

Timberland 11964.9Reserved forestland 126.7Other forestland 37.1

All live on timberland (million ft 3 )Inventory 17292 3

Component of changeGross growth 742.5 (729.4) 381.7 (325.3)Mortality 74.9 (72.1) 74.8 (53.3)Net growth 667.5 (657.3) 306.9 (272.0)Removals 568.8 (560.2) 189.5 (161.1)

million ft Inventory 17292.3Net annual growth 974.4

Annual mortality* 149.7Annual removals 758.3

Growing stock on timberland (million ft 3 )Inventory 15982.9Removals 568.8 (560.2) 189.5 (161.1)Net annual growth 929.3

Annual mortality* 125.3Annual removals 721.3

Sawtimber on timberland (million fbm )Inventory 62897.5Net annual growth 3517.8

The positive net growth‐to‐removals ratios indicate growth exceeded 

Annual mortality* 536.6Annual removals 2616.0

* Net annual growth includes annual mortality.

removals.

For private lands, the ratio across all species was 1.33 for all trees and 1.31 for growing stock trees.

Page 14: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

BiomassStanding Biomass (oven‐dry tons) – Aboveground Wood and Bark

Region Species Oven‐dry tons

Biomass of all trees (oven‐dry tons) on plantation forestland by species, 2008

Softwood biomass is 206.1 million oven‐dry tons for live trees (dbh of 1.0 inch or greater).

Hardwood biomass is 238 7 million oven dry tons for live trees

Pi Pl t d Pi O k Pi

Loblolly pine 46,488,146Other 221,687Slash pine 4,464,736

Loblolly pine 22,924,925

SE Texas

Standing biomass (oven‐dry tons) of all trees on forestland by forest type and county, 2008

Hardwood biomass is 238.7 million oven‐dry tons for live trees.

Pine Planted Pine Oak ‐Pine Other 539,690Slash pine 278,597

NE Texas

Standing biomass (oven‐dry tons) of all trees on forestland by county, 2008

None recorded

0 500 000NE Texas

O k hi k O k El h tt d

forestland by county, 20080 to 500,000

500,000 to 1,000,000

1,000,000 to 3,000,000

3,000,000 to 5,000,000

5,000,000 to 7,000,000

1,000,000 to 4,000,000

4,000,000 to 7,000,000

0

0

Oak‐hickory Oak‐gum‐cypress Elm‐ash‐cottonwood5,000,000 to 7,000,000

7,000,000 to 9,000,000

9,000,000 to 11,000,000

11,000,000 to 13,000,000

13,000,000 to 15,000,000

7,000,000 to 10,000,000

10,000,000 to 13,000,000

13,000,000 to 16,000,000

16,000,000 to 19,000,000

SE Texas

19,000,000 to 22,000,000

Page 15: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

BiomassAverage Standing Biomass Per Acre

Pine Planted Pine Oak‐Pine

Average standing biomass (oven‐dry tons) per acre of all trees on forestland by county, 2008

None recorded

0 to 10

10 to 20

Oak hickory Oak gum cypress Elm ash cottonwood

10 to 20

20 to 30

30 to 40

40 to 50

50 to 60 Oak‐hickory Oak‐gum‐cypress Elm‐ash‐cottonwood

70 to 80

80 to 90

90 to 100

50 to 60

60 to 70

90 to 100

100 to 110

Page 16: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

Logging Residue

Harvesting operations produce logging residue – or biomass – that can potentially be used to produce bioenergy and biofuel.

An estimated 2.3 million green tons of logging residue (including tops, limbs, and unutilized cull trees but excluding stumps) was generated during 2008 harvests.

Due to logistics harvesting techniques and economics not all

Logging residue (green tons per acre), 2008

Due to logistics, harvesting techniques, and economics, not all logging residue will be available for bioenergy/biofuel production – some believe only 30 to 60% of residues will be utilizable.

0 to 20,00020,000 to 40,00040 000 to 60 00040,000 to 60,000

60,000 to 80,00080,000 to 100,000100,000 to 120,000

120,000 to 140,000140,000 to 160,000

160,000 to 180,000180,000 to 200,000

Page 17: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

Acres Planted by Year

Year Family forest All1999 48,358      147,0892000 43,181      164,430

Number of acresBoth the number of family forest (formerly non‐industrial private forest landowners) and the total number (also includes private companies and public agencies) of acres planted have declined over the past , ,

2001 48,438      156,8752002 33,164      114,3922003 26,358      90,1932004 36,896      113,6862005 33 296 103 601

planted have declined over the past decade.  

‘Year’ refers to fiscal year.  For example, fiscal year 2006 began on Oct 1, 2005 and 

d d 2005 33,296      103,6012006 26,710      92,0302007 37,229      105,9362008 25,960      86,546

ended Sept. 30, 2006.

All species are included.

Page 18: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

Major Mill Shutdowns/Closures

Company Name Mill Location Mill TypeAbitibi‐Consolidated Inc. Lufkin, TX Paper millClemsa Lumber Co. Pollok, TX Lumber millGeorgia‐Pacific Logansport, LA PlywoodGeorgia‐Pacific Springhill, LA PlywoodInternational Paper Co. Bastrop, LA Paper millLouisiana‐Pacific Corp. Silsbee, TX Oriented Strand Board (OSB)Norbord Inc. Jefferson, TX Oriented Strand Board (OSB)North American Procurement Co. Moscow, TX Chip millPasadena Paper Co. Pasadena, TX Paper millPotlatch Corp. Prescott, AR Lumber millTemple‐Inland Pineland, TX Softwood VeneerWeyerhaeuser Mountain Pine, AR Plywood

Several large‐scale mills in East Texas and surrounding states have halted operations, some permanently while others indefinitely, resulting in an impact on the long term timber supply.

Page 19: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

Timber Stumpage Price TrendsCurrent softwood sawtimber stumpage prices are at their lowest since the late 1990sCurrent softwood sawtimber stumpage prices are at their lowest since the late 1990s.

Hardwood sawtimber has also dropped after peaking in 2007‐2008.

Hardwood and softwood pulpwood prices also dropped since peaking in 2007‐2008.

Chip‐n‐saw prices gradually dropped following a peak period from 2004 to 2007.

Prices below are from Jan/Feb 1999 to Jan/Feb 2009.

20

25

30

on 10

12

14

16

18

on

NE Texas

SE Texas

Softwood sawtimber Softwood chip‐n‐saw Softwood pulpwood

40

50

60

70

on

0

5

10

15

1999

 Jan/Feb

1999

 Mar/A

pr1999

 May/Jun

1999

 Jul/Aug

1999

 Sep

/Oct

1999

 Nov

/Dec

2000

 Jan/Feb

2000

 Mar/A

pr2000

 May/Jun

2000

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2000

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2000

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2001

 Jan/Feb

2001

 Mar/A

pr2001

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2001

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2002

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2003

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2003

 Mar/A

pr2003

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2003

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2003

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2004

 Jan/Feb

2004

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 May/Jun

2004

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2004

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2005

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2005

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pr2005

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2006

 Jan/Feb

2006

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pr2006

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2006

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2006

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2006

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/Dec

2007

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2007

 Mar/A

pr2007

 May/Jun

2007

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2007

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2008

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2008

 Mar/A

pr2008

 May/Jun

2008

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2008

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/Oct

2008

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/Dec

2009

 Jan/Feb

$/to

NE Texas

SE Texas0

2

4

6

8

1999

 Jan/Feb

1999

 Mar/Apr

1999

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Page 20: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

Definition of TermsComponent of change. References the change in the volume of Forestland. Land at least 10% stocked by forest trees of any size or trees averaged over the years of the intersurvey period, specifically:

Average annual gross growth. Change in the volume of trees inthe absence of cutting and mortality 

A l li V l f h di d f

that has been at least 10% stocked in the past, and not currently developed for nonforest use. The minimum dimensions are 1 acre in size and 120 feet in width.

Timberland. Forestland capable of producing 20 cubic feet ofd l ll d i hd f i bAverage annual mortality. Volume of trees that died from 

natural causes

Average net annual growth. Net change in volume in the absenceof removals, and calculated as average annual gross growthminus average annual mortality

wood volume per acre annually and not withdrawn from timberutilization

Reserved forestland. Public forestland capable of producing 20 cubic feet of wood volume per acre annually, but withdrawn from timber utilization through statute orminus average annual mortality

Average annual removal. Volume of trees removed from theinventory by harvesting, cultural operations, (e.g., timber‐standimprovement), land clearing, or change in land use and averagedover the years of the intersurvey period

withdrawn from timber utilization through statute or administrative  regulation

Other forestland. Forestland that is incapable of producing 20 cubic feet of wood volume per acre annually under natural conditions due to adverse site conditions such as

D.b.h. Tree stem diameter in inches measured outside the barkand 4.5 feet above the ground (breast height)

Family forest. Private land owned by individuals andf ili i l di f h th d t

sterile soils, dry climate, poor drainage, high elevation,steepness, or rockiness.  The term is synonymous with woodland in earlier FIA reports.

Forest type. Forestland classification of the species forming al lit f li t t ki d l l b d l ith ffamilies, including farms, where the owner does not own

a primary wood‐using plant or is not a formally incorporatedcompany or organization.  Formally referred to as non‐industrial private forest (NIPF) owners.

plurality of live tree stocking, and largely based on an algorithm of tallied trees

Growing‐stock trees. Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently orpotentially, if too small to qualify as a sawlog. The log(s) must meetpotentially, if too small to qualify as a sawlog. The log(s) must meet dimension and merchantability standards to qualify. Trees must have one‐third of the gross board‐foot volume in sound wood, either currently or potentially.

Page 21: East Texas Forestlands - Texas A&M Forest Service...Growing‐stock trees.Live trees that contain at least one 12‐foot or two 8‐foot logs in the saw‐log portion, either currently

Definition of TermsGrowth‐to‐removals ratio. The ratio of net growth in volume Poletimber. As defined by FIA, softwood species 5.0 to 8.9 inches divided by the volume removed by human activity, including  harvesting, land clearing, and changes in land use

Hardwoods. Dicotyledonous trees, usually broadleaf and deciduous.

L i id W d i l h i d f i

d.b.h. and hardwoods 5.0 to 10.9 inches d.b.h.

Saplings. As defined by FIA, Live trees 1.0 to 4.9 inches d.b.h.

Sawtimber. As defined by FIA, softwood species 9.0 inches d.b.h and l d h d d 11 0 i h d b h d lLogging residue.  Woody material that is not removed from sites 

during harvesting operations.  Types of logging residue include stumps, tops, limbs and unutilized cull trees. 

Stump residue is the part of the tree that is lower than the cutting   point and thus left after the harvesting operation, is generally not available commercially since the cost of obtaining the stump or

larger and hardwoods 11.0 inches d.b.h. and larger

Seedlings. As defined by FIA, live trees < 1.0 inch d.b.h. and  ≥ 1 foot tall for hardwoods,  ≥ 6 inches tall for softwoods

Softwoods Coniferous trees usually evergreen havingavailable commercially since the cost of obtaining the stump or root biomass is likely prohibitive. Tops refer to the tops of the trees that are either broken during harvesting or are cut off the central stem of the tree due to a  merchantability standard.  Limbs refer to the branches of the trees. 

Softwoods. Coniferous trees, usually evergreen, havingneedles or scale‐like leaves

Stumpage. Standing trees in the forest

Volume. The amount of sound wood in live trees at least 5.0 inches Cull trees are the trees that cannot be used to produce saw logs due to defects, rot, or form. Some cull trees are used as pulpwood and others are left unutilized as a part of logging residue. 

Tops, limbs, and unutilized cull trees are the logging residue that is t ti ll il bl bi f d ti h i l

d.b.h. from a 1‐foot stump to a minimum 4.0‐inch top diameter outside bark of the central stem

potentially available as biomass for energy production or chemical extraction.