Determining forest stand characteristics after thinning, in order to assess the quality of work and update inventory data thinned stand, is one few management tasks for which an efficient accurate automation solution has not yet been developed. Currently, are determined by a certified expert using manual instruments such as range finder, digital or calliper, Bitterlich gauge. Manual measurements add significant cost management, automating this process could increase competitiveness owners...

Tracked forwarders is one of the solutions for forest soils with poor bearing capacity providing ability to use well-known technology reasonable cost improve accessibility resources.Tracked are not common in nowadays and only a few models produced serially.The ProSilva F2/2 new middle-class forwarder, whose frontal tracks replaced big tires, ensuring large contact surface, increased mobility machine significantly reduced mass without loosing load (15 tonnes).The aim study was evaluate...

The aim of this study is to investigate potential uses Kranman Bison 10000 6WD forwarder in stands, where roundwood extracted with a chainsaw and Vimek 404 T5 harvester normal difficult forwarding conditions. Productivity was compared medium-sized John Deere 810 under In total 230 loads were forwarded during the study, including 63 from areas, harvested chainsaw, 167 harvester. average load 2.0 m³ (the maximum 2.5 therefore capacity 80%). 33 minutes productive work time spent by one...

The topicality of the study is determined by increasing demand for sanitary felling services currently mainly provided manual work. Harvesting using hand-held motor instruments a physically hard work whose costs are rapidly, but labor availability declining. In cuttings, additional complications caused use conventional machinery in harvesting, which necessitates creation wide (4 m) technological corridors and significantly increases proportion damaged remaining trees stand (according to past...

Productivity of a harvester significantly affects costs mechanized felling, which in turn determines, if commercial thinning will be profitable. The objective this study is to estimate productivity and prime cost Logset 5HP GT with increased boom length (11 m), equipped the TH45 felling head, thinning. Trials are conducted Latvia, eastern Vidzeme, coniferous stands. To evaluate GT, time was carried out. Influence small trees (diameter at breast height < 8 cm) on harvesting...

The aim of the study was to compare productivity and logging costs using small class harvester Vimek 404 T5 in thinning birch plantations young coniferous stands.It found that due a lower fuel consumption, maintenance initial investment, cost working hour is significantly smaller than middle harvester.The confirmed suitable for plantation; also previous conclusions about main advantages compared first -low consumption maintenance, high equipment compactness, which allow reduce strip road...

The aim of the study is to evaluate impact accumulating grapple on forwarding productivity in thinning comparison standard and potential areas application grapples.Trials were conducted 3 coniferous stands nutrient-poor mineral soil with total area 15.2 ha.Two work methods are compared -forwarding a John Deere 1110D ECO III forwarder, equipped either an (first method) or (second method).According results use slight increase (2.3 % per load 1.4 m logs).The difference not significant, however...

The aim of this study is to clarify the possibilities for applying compact class logging machines in Latvian conditions.The equipment evaluated Vimek harvester and forwarder.The possibility using both forest operations from ditch clearing final felling has been terms productivity economy.The can be characterized by polynomial equations.Statistical significantly higher pre-commercial thinning was observed spring trials areas with or without extracted undergrowth trees comparison dense...

The aim of the study was to evaluate impact harvester head feed roller type on fuel consumption and productivity during spring season.This compares rollers with moving metal plates rubber shock absorbers (Moipu plate wheel rollers, hereinafter named -gentle rollers) large round spikes (hereinafter -conventional rollers).The conducted in Vidusdaugava forestry (forests managed by Joint Stock Company Latvia State Forests).A total area 18.69 ha or 19 felling sites were logged final gentle 20.29...

The aim of the study is to evaluate productivity and potential reduction greenhouse gas (GHG) emissions due use compact class Malwa harvester 560H forwarder 560F in thinning aspen hybrid plantations as well indicate production cost analyse possibility forest machines this definite quality thinning, including damage remaining trees, width strip-roads, provide recommendations for further development technology.These parameters have significant effect on productivity, fuel consumption vitality...

The aim of the study is to compare forwarder grapple with a tilt function (tilt grapple) and standard grapple, as well evaluate advantages disadvantages these grapples in thinning.Trials are conducted 4 coniferous stands North Western part Latvia state forests managed by Joint stock company "Latvia State forests" (LSF).Two working methods compared study.In first method equipped mechanism second used.Both tested same stands.John Deere 810 D used base machine.Forwarding carried out two...

The aim of the research is to find out changes in productivity depending on diameter tree be cut as well most important factor influencing reduction using small size forest machines thinning Latvia.The equipment used study -both harvester and forwarder Vimek.The results confirm appropriateness exact technique if harvested trees 3 30 cm.The average achieved with a head Keto Forest Eco (option 2) Norway spruce stands 8 cm weighted reached 9.59 m h -1 , deciduous 9 was 10.17 but Scots pine 12...

The aim of this study is to compare productivity and costs medium-sized small-sized harvesters in pre-commercial thinning. In the data on harvesting were obtained stands, where biofuel was prepared using two equipped with different harvester heads. total 677 m3 wood harvester, but 1 164 m3 prepared. Although annual small-class are lower by 16 %, comparing middle-class harvesters, rates shown John Deere 1070 E (equipped H 754 head) significantly higher...

With the increasing demand for renewable energy in domestic market, additional attention is paid to use of stump-wood supply.The stump harvesting technology not substantiated sufficiently so that end users can this unpredictable raw material generate heat and power.Service providing logging companies need know specific requirements equipment characteristics technologies order assess possibility acquiring natural resource.The should be planned along with regenerative felling, because layout...