Forestry and logging businesses carry out work involved in establishing, maintaining and harvesting woodland. Services may include planting trees, managing young growth, thinning crowded stands, pruning, clearing scrub and assessing trees for removal. Contractors can also plan and carry out timber harvesting, using machinery or hand tools to fell trees and process trunks into logs or other timber products. After felling, timber may be sorted, stacked, extracted from the woodland and transported for further processing. Related work can include removing or treating stumps, maintaining forest tracks and managing brash and other residues. Work is planned around the type and condition of the woodland, the intended use of the timber and site constraints, such as steep ground, watercourses or wildlife habitats. Customers include woodland owners, estates, forestry managers and organisations responsible for land, with services ranging from individual operations to ongoing woodland management.