We time-studied a Cat 950F and a Cat 528 grapple skidder as extraction devices for moving bunched whole trees to a landing in a short rotation eucalyptus plantation. The front-end loader was 40 to 60% more productive than the grapple skidder, depending on extraction distance. Alternatively, the single loader could both extract trees and handle the landing duties such as moving residues whereas ...

Harvest traffic with heavy equipment causes damage to forest soils. Whereas increased soil damage has been reported with increasing harvest equipment traffic and on increasing slope gradients, it is unclear how much soil damage is caused by different directions of skidding. We examined the effects of traffic frequency, skid trail slope and skidding direction on the dry bulk density and total po...

We time-studied a Caterpillar 950F front-end loader and a Caterpillar 528 grapple skidder used to extract bunched whole trees to a landing in a short rotation Eucalyptus plantation. The loader was 40-60% more productive than the grapple skidder, depending on extraction distance. Alternatively, the single loader could both extract trees and handle the landing duties, such as moving residues from...

Machine traffic and timber skidding significantly affect the soil surface and soil properties. The effects are mostly negative and result in soil erosion, worsening of soil properties and inhibition of the growth of roots and soil organisms. In this study, we evaluated forest soil damage caused by the HSM 805 HD wheeled skidder during timber skidding in selected forest stands in the School Fore...

ALLMAN MICHAL, ALLMANOVÁ ZUZANA, JANKOVSKÝ MARTIN, FERENČÍK MICHAL, MESSINGEROVÁ VALÉRIA. 2016. Damage of the Remaining Stands Caused by Various Types of Logging Technology. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 64(2): 379–385. Forest harvesting causes a lot of damage, which results in damage of the remaining stand. These damages have diff erent character. Thei...

Nacrtak The motion resistance ratio, gross traction ratio and net traction ratio of a wheel cable skidder were determined and mathematical models derived for three tire inflation pressure values with or without tire chains on forest road in mountainous conditions. The motion resistance ratio increases with the increase of tire inflation pressure. On the contrary, the gross traction ratio increa...

In tropical Indonesia, rainforests are managed by an intensive forest management system (IFMS). The IFMS has promoted selective logging for timber harvesting and line planting to enrich the standing stock. implementation of reduced canopy cover, disturbed surface soil, changed soil hydraulic properties, increased direct runoff erosion. Investigation impact on properties generation using a satur...

Nacrtak Roadside chipping is a common harvesting system in Australian plantations, which utilizes a mobile chipper stationed at the field edge to produce high-quality pulp chips for export. The studied harvesting system included a feller-buncher, two grapple skidders, a flail-debarker and a disc chipper. The study goals were to determine machine productivity, operation costs, fuel consumption, ...

Background: Poplar tree plantations for wood production are part of a worldwide growing trend, especially in moist soil sites. Harvesting operations sites such as poplar require more study detailed and increased knowledge on environmental economic aspects issues. Methods: In this study, the effects moisture content (dry vs. moist) productivity, cost, emissions greenhouse gases (GHG) caused by d...