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    Effect of Timber Harvesting Techniques and Slopes on Soil Respiration of Young and Mature Black Pine Stands in Northwestern Turkiye
    (North Carolina State Univ Dept Wood & Paper Sci, 2025) Genc, cigdem Ozer; Sariyildiz, Temel; Aricak, Burak
    Releases of CO2 from forest soils was studied relative to different timber harvesting techniques, slope classes, and stand age. Three timber harvesting techniques (suspended skidding (SS), skidding by using a skidding cone (SC), and cable-pulling (CP)) were used in young and mature black pine stands at three different slopes (0 to 20% - S1, 20% to 33% - S2, and > 33% - S3). Soil respiration measurements were carried out at five-day intervals (1st, 5th, and 10th day) and 6 months later after the timber harvesting techniques. The soil respiration increased on the first day, decreased on the 5th and 10th days, and reached its lowest level on the 6th month. The SC technique in the young stands showed the highest soil respiration value on the slopes indicating that the cone placed on the head of the log during the skidding operations does not deform the soil. In the mature stands, all timber harvesting techniques and the undisturbed sites showed lower values than in the young stands on the S1. On the S2, mean value was higher in the mature stands. In contrast to the young stands, the undisturbed stands had the highest soil respiration.
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    The Current Status of Forest Residues and Disposal Machinery in Turkiye
    (Forest Engineering and Technologies Platform, 2024) Gülci, Sercan; Sariyildiz, Temel; Akay, Abdullah Emin
    The term "cutting residue" is a widely used term in Turkey, which refers to the leftover pieces of logs in the forest after cutting, except for the logs. As of yet, there is no specific expression and explanation for the term "slash" in Turkish forestry. Turkey carries out intensive forestry activities based on industrial wood production, primarily in mature stands and damaged after disasters such as fire or storm fall. Products that do not carry industrial woodiness in the stand, such as branches, roots, and tips that are not suitable for industrial production, are considered firewood and used for energy production or left in the stand. As a result, it is observed that the collected cutting residues from the fields that are sufficient in terms of benefit and cost is burned to generate electricity in electricity generation stations. Due to the demand for forest-based wood raw materials in recent years, some domestic companies have begun converting thick branches into industrial products such as paper and chipboard production. Additionally, some studies have been conducted to reduce transportation costs in bringing cutting residues to the economy, focusing on the storage and processing of forest cutting residues on the landing sites. In this regard, small-scale chipping machines have been produced by the domestic industry. Therefore, slash disposal and mechanization have a very limited place in Turkish forestry. Decision makers need to prepare action plans in this regard and provide support to joint research projects with academic units. © Copyright 2024 by Forest Engineering and Technologies Platform.