Abstract
The paper investigated the effects of ground-based skidding on soil physical properties. For this purpose, soil disturbance following skidding was assessed for four levels of traffic intensity and three levels of slope gradients; each combination replicated three times. Soil samples were collected from the depth interval of 0-10 cm before and after traffic with a Timberjack 450C skidder in control areas and on skid trails. All soil response measures revealed detrimental compaction and porosity conditions in the skid trails, particularly on steep slopes >20%. The results clearly showed that most of the potential impact occurred after the initial passes. Substantial increases in bulk density appeared right after the first two skidder passes on steep slopes. Regardless of traffic intensity, however, dry bulk density and microporosity increased and total porosity, macroporosity, void ratio and soil moisture content decreased considerably regardless of slope gradient. Nonetheless, compaction effects and changes in soil physical properties were much more pronounced on steeper compared to more gentle slopes. We suggest that the dramatic increase in soil disturbance on steeper slopes >20% may be associated with the combination of increased load on the rear axle and lower skidder speed.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 25-39 |
| Number of pages | 15 |
| Journal | Silva Balcanica |
| Volume | 18 |
| Issue number | 1 |
| State | Published - Jan 1 2017 |
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All Science Journal Classification (ASJC) codes
- Forestry
- Ecology
Cite this
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Compaction of forest soils with heavy logging machinery. / Naghdi, Ramin; Solgi, Ahmad; Zenner, Eric; Najafi, Akbar; Salehi, Ali; Nikooy, Mehrdad.
In: Silva Balcanica, Vol. 18, No. 1, 01.01.2017, p. 25-39.Research output: Contribution to journal › Article
TY - JOUR
T1 - Compaction of forest soils with heavy logging machinery
AU - Naghdi, Ramin
AU - Solgi, Ahmad
AU - Zenner, Eric
AU - Najafi, Akbar
AU - Salehi, Ali
AU - Nikooy, Mehrdad
PY - 2017/1/1
Y1 - 2017/1/1
N2 - The paper investigated the effects of ground-based skidding on soil physical properties. For this purpose, soil disturbance following skidding was assessed for four levels of traffic intensity and three levels of slope gradients; each combination replicated three times. Soil samples were collected from the depth interval of 0-10 cm before and after traffic with a Timberjack 450C skidder in control areas and on skid trails. All soil response measures revealed detrimental compaction and porosity conditions in the skid trails, particularly on steep slopes >20%. The results clearly showed that most of the potential impact occurred after the initial passes. Substantial increases in bulk density appeared right after the first two skidder passes on steep slopes. Regardless of traffic intensity, however, dry bulk density and microporosity increased and total porosity, macroporosity, void ratio and soil moisture content decreased considerably regardless of slope gradient. Nonetheless, compaction effects and changes in soil physical properties were much more pronounced on steeper compared to more gentle slopes. We suggest that the dramatic increase in soil disturbance on steeper slopes >20% may be associated with the combination of increased load on the rear axle and lower skidder speed.
AB - The paper investigated the effects of ground-based skidding on soil physical properties. For this purpose, soil disturbance following skidding was assessed for four levels of traffic intensity and three levels of slope gradients; each combination replicated three times. Soil samples were collected from the depth interval of 0-10 cm before and after traffic with a Timberjack 450C skidder in control areas and on skid trails. All soil response measures revealed detrimental compaction and porosity conditions in the skid trails, particularly on steep slopes >20%. The results clearly showed that most of the potential impact occurred after the initial passes. Substantial increases in bulk density appeared right after the first two skidder passes on steep slopes. Regardless of traffic intensity, however, dry bulk density and microporosity increased and total porosity, macroporosity, void ratio and soil moisture content decreased considerably regardless of slope gradient. Nonetheless, compaction effects and changes in soil physical properties were much more pronounced on steeper compared to more gentle slopes. We suggest that the dramatic increase in soil disturbance on steeper slopes >20% may be associated with the combination of increased load on the rear axle and lower skidder speed.
UR - http://www.scopus.com/inward/record.url?scp=85036534208&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85036534208&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:85036534208
VL - 18
SP - 25
EP - 39
JO - Silva Balcanica
JF - Silva Balcanica
SN - 1311-8706
IS - 1
ER -