Which are considered types of extraction in forestry operations?

• A. hand hauling, mule teams
• B. chainsaw, log arch, winch
• C. tractor, skidder, crane
• D. horse, forwarder, skidder, cable system

Answer: (D)

Extraction in forestry is about moving harvested timber from the stump or stand to a roadside, landing, or mill. The best set covers the main ways logs are transported off the worksite: horse represents animal-powered extraction for rough or sensitive terrain; a forwarder carries logs off the ground to a loading point; a skidder drags logs along the ground toward a landing; and a cable system uses yarding to move logs from slopes or dense areas where ground transport isn’t practical. These options together span the primary methods used to get logs out of the harvest area. Tools like chainsaws are for cutting, not moving logs; log arches and winches aid extraction but don’t by themselves constitute a primary extraction method; tractors and cranes can be involved in extraction but don’t form the broad set shown here.