Latest Articles from Silva Balcanica Latest 3 Articles from Silva Balcanica https://silvabalcanica.pensoft.net/ Thu, 28 Mar 2024 21:59:15 +0200 Pensoft FeedCreator https://silvabalcanica.pensoft.net/i/logo.jpg Latest Articles from Silva Balcanica https://silvabalcanica.pensoft.net/ Short review of collecting technologies and methods in forest harvesting residues recovery https://silvabalcanica.pensoft.net/article/97620/ Silva Balcanica 24(1): 55-68

DOI: 10.3897/silvabalcanica.24.e97620

Authors: Mohammad Reza Ghaffariyan

Abstract: Tree felling and processing can create harvesting residues including leaves and twigs (needles), cones, barks, and branches. Collecting forest harvesting residues requires application of suitable machines and working methods. This article is aimed at reviewing the published reports to identify new harvesting machines and working methods for recovering harvesting residues and the current gaps. The scope of review included published research reports/articles from 2017 to 2022 (last five years). This global review results showed that popular methods for residue collection are chipping residues at roadside/landing and integrated biomass recovery. Forwarder, cable yarder and in-field chipper are predominantly applied within various recovery methods depending on ground and stand conditions. Harvesting residues are one of the promising sources for bioenergy production which requires developing efficient and low-cost harvesting systems. Latest research findings indicate that piling harvesting residues by a harvester-pro-cessor can improve the collecting productivity by the forwarder within cut-to-length harvesting opera-tions. Integrating residue biomass recovery with conventional timber supply can reduce the total supply chain cost by 2%. Researchers also recommend applying more climate-friendly technologies and focus-ing on developing new machines with lower fuel consumption and subsequent emissions. Future studies can focus on the following subjects; a) to determine the productivity and cost rates of various residue recovery systems, b) to develop and test technologies with lower fuel consumption rates and c) to find in-novative solutions to utilize thinning materials and best practices to store and process biomass materials.

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Review Article Wed, 22 Mar 2023 11:51:00 +0200
Work productivity assessment of small forwarders in forest operations: An international review https://silvabalcanica.pensoft.net/article/91143/ Silva Balcanica 23(2): 55-68

DOI: 10.3897/silvabalcanica.23.e91143

Authors: Mohammad Reza Ghaffariyan

Abstract: There are two types of forwarders available in the practice including conventional forestry forwarders and farm tractors equipped with a trailer/grapple loader that operate as a forwarder. Forwarders loading capacity can vary depending on the machine size. This paper aimed to review the work productivity of small size forwarders (payload

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Review Article Tue, 20 Dec 2022 17:14:00 +0200
A short review on studies on work productivity of mechanical tree planting https://silvabalcanica.pensoft.net/article/64233/ Silva Balcanica 22(2): 25-32

DOI: 10.3897/silvabalcanica.22.e64233

Authors: Mohammad Reza Ghaffariyan

Abstract: Reforestation can be carried out using natural regeneration or artificial regeneration. There are vari-ous methods for the artificial regeneration, including manual planting, mechanical planting and aerial/or ground seeding. This article aimed to review the current reports on the productivity of mechanical planting to provide a summary of productivity rates for the planting machines. According to the review’s results, mechanical planting productivity may vary from 143 to 475 seedlings per productive machine hours depending on the machine type, environment (such as surfaces obstacles and stoniness) and the operator experience. Employing skilled operators and selecting suitable worksites can help increasing the work productivity. Integrating and optimising the whole planting chain, from the nursery to the plant-ing phase, can assist also with reducing the cost and improving the productivity. As mechanical planting machines get more widely adopted in different countries, their overall efficiency will improve over time.

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Research Article Tue, 5 Oct 2021 08:35:00 +0300