Influences of Timber Harvesting Methods on Soil Disturbance
2017
Lee, E., Seoul National University, Seoul, Republic of Korea | Qiwen Li, Seoul National University, Seoul, Republic of Korea | Eu, S., Seoul National University, Seoul, Republic of Korea | Han, S.K., Korea National College of Agriculture and Fisheries, Jeonju, Republic of Korea | Im, S., Seoul National University, Seoul, Republic of Korea
Soil disturbance caused by timber harvesting is widely recognized as a potential threat to forest utilization. The degree and extent of soil disturbance is believed to vary with respect to harvesting methods and logging machines. This study has conducted to assess the degree of soil disturbance associated with ground-based cut-to-length (GC) and cable yarding with whole tree (CW) harvesting methods. Soil disturbance was classified using a visual assessment of harvest unit. The properties of soils in different disturbance levels were also evaluated to understand the influence of timber harvesting on soil structure with soil core sampling method. The deep disturbance and soil compaction were observed in sites by 48% and 23% through harvesting areas for GC and CW logging methods, respectively. The results showed that logging machine and number of machine passage had significant influences on soil bulk density and porosity. Soil disturbance types such as rutted, slash cover, and compact were influenced by equipment travel trends in a GC method.
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