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Table 1 Detailed information concerning articles that were selected for the meta-analysis

From: Impact of mechanized harvesting on compaction of sandy and clayey forest soils: results of a meta-analysis

Authors (publication year)

Location

Texture

Machine(s)

Number of passes

Number of replications

Number of substudies

Seixas and McDonald (1997)

North Carolina (USA)

Sand/other

Forwarder Timberjack 910 (6 tyres), front tyres 700/55-34.00, back tyres 48 × 31.00-20 (wide)

6/6

40/20

2/2

Forwarder Timberjack 910 (6 tyres), front tyres 700/55-34.00, back tyres 600/55-26.5 (narrow)

6

20

2

Forwarder Rottne Rapid (8 tyres), front tyres 600/55-26.5, back tyres 48 x 31.00-20

6

40

2

Brais (2001)

Quebec-Ontario (Canada)

Other

Clark 667C

5/15

9/9

1/1

Sand

Tree Farmer C8E

5/15

9/9

1/1

McNabb et al. (2001)

Western Alberta (Canada)

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Valmet 540 forwarder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Sand

Caterpillar D4H TSK

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Other

Timberjack 520A forwarder

3/7/12

16/16/16

3/3/3

Other

Skidder

3/7/12

16/16/16

3/3/3

Block et al. (2002)

Canada

Sand

Feller-buncher, grapple skidder, stroke delimber

 

29

2

Feller-buncher, grapple skidder, stroke delimber

 

30

2

Feller-buncher, grapple skidder, stroke delimber

 

30

2

Other

Line skidder

 

47

2

Feller buncher, grapple skidder

 

42

2

Sheridan (2003)

Victoria (Australia)

Other

Caterpillar Cat 518 Series II

2/4/10

10/10/10

3/3/3

Rab (2004)

Victorian Central Highlands (Australia)

Other

Rubber tyre skidder CAT 518 cable

 

6

3

Ares et al. (2005)

Washington (USA)

Other

CAT 330 L shovel with 70 cm

2

52

3

Simcock et al. (2006)

Auckland (New Zealand)

Clay

Rubber-tyred C6E Treefarmer skidder

2

65 (0–10 cm)

2

42 (10–20 cm)

Ampoorter et al. (2007)

The Netherlands, stand 1

Sand

Timberjack 1070D harvester

1

28

3

Timberjack 1070D harvester (1 pass), Timberjack 1110D forwarder (1 pass)

2

28

3

Timberjack 1070D harvester (1 pass), TImberjack 1110D forwarder (3 passes)

4

28

3

The Netherlands, stand 2

Sand

Timberjack 1070D harvester

1

28

3

Timberjack 1070D harvester (1 pass), Timberjack 1110D forwarder (1 passes)

2

28

3

Timberjack 1070D harvester (1 pass), TImberjack 1110D forwarder (3 passes)

4

28

3

Schack-Kirchner et al. (2007)

Brazil

Clay

Skidder CAT 528

1/3/9

6/6/6

3/3/3

Ampoorter et al. (2010)

Belgium, stand 1

Other

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

Belgium, stand 2

Other

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

Belgium, stand 3

Other

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

Belgium, stand 4

Other

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

Belgium, stand 5

Sand

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

Belgium, stand 6

Sand

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

Belgium, stand 7

Other

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

Belgium, stand 8

Other

New Holland TCE50

1/5

6/6

3/3

John Deere grapple skidder JD640

1/5

6/6

3/3

  1. Other represents all texture classes apart from the soil texture classes included in subsets Sand and Clay; number of passes refers to the number of passes the machine made; number of replications refers to the number of soil samples that were taken to determine the soil impact for a specific treatment
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Annals of Forest Science

ISSN: 1297-966X