The invasion and spread of invasive plants is a major problem in forested ecosystems. Invasive plants can displace existing vegetation and, in some cases, take over the site and cause major ecosystem changes that jeopardize ecological processes and functions as well as habitat for wildlife. Timber harvesting often creates conditions that establish and spread invasive plants. Machinery and traffic movement within a job site often introduce and spread seeds, roots, and plant parts from one job site to another. A Forest Service researcher with the agency's Northern Research Station analyzed timber harvesting processes and how they create disturbances; explained how seeds, roots, and other parts of invasive plants can be spread; and proposed voluntary best management practices for invasive plant mitigation during timber harvesting operations. Some of the proposed best management practices include: train staff to identify, monitor for, report, control, and map new/old infestations; inspect and clean equipment of soil, seeds, plants; and wash off equipment before moving from site.