In this study, degree of soil compaction and rutting caused on the skid road by rubber-tired tractor was investigated in northern pine plantation forest in Turkey. In research area, the cross sections were selected in every 20 meter along the skid road. Penetrometer measurements were made in each cross section. Also, the soil samples were collected to on the skid road and forest site. The rutti...

Nacrtak Extracting logs from stump to landings causes extensive damages to forest stand and soil. In this research two parcels adjacent to each other were selected in order to assess the effect of traditional and mechanized methods of logging on regeneration and soil compaction. A skid trail and a mule trail with similar longitudinal slope, skidding direction and total volume of extracted wood ...

Grapple skidder is a machine designed for the extraction of tree bunches after felling. Several factors influence its technical performance and costs such as terrain slope, operator experience time, type, size each operating cycle, among others. Thus, it becomes necessary to weigh variables that most productivity grapple skidder. So, main objective was evaluated according bunch using two feller...

ABSTRACT To reduce the damage caused by logging in Amazon rainforest, new metaheuristics have been implemented and tested to ensure sustainability of this economic segment. Therefore, study aimed compare alternatives for road sizing log deck allocation. In a forest management unit, skidding decks was evaluated two different areas. determine skidding/log relation, georeferenced points were gener...

The traditionally used mixed grouser of the metal track link causes a decrease in traction qualities agricultural tractor. use rear on link, our opinion, will significantly improve properties an tractor with and reduce soil destruction. When is immersed soil, additional horizontal deformation occurs, which changes law distribution along support surface trackdrive, ensures alignment shares imple...

We give a mathematical description of the initial stage both axles skidding for wheeled vehicle on bend that arises in case blocking or slipping wheels one its axles. It is shown within framework Zhuravlev’s model friction, which takes into account moments spinning friction (they appear as result interaction with reference plane), less than Coulomb model.

In this paper, a realistic simulation model for Wheeled Mobile Robot (WMR) is given by a dynamical system that switches between three models corresponding to three different tire/road contact conditions: ideal condition, skidding condition and slipping condition. Then, an algebraic based numerical identification for the discrete state (tire/road contact condition) of this switching system is pr...

in forest harvesting, there is an ongoing trend to increase constantly the size, power and load of logging machines. this may cause soil degradation in forest ecosystems as the passes of these machines modify important soil structural characteristics. the present study was conducted to examine impact of skidding traffic, trail slope, traffic frequency, and soil depth on bulk density and soil co...