Otherwise, all stands having conifers other than lodgepole pine and whitebark pine as the leading species are mature when the stand age is greater than 120 years. The MAI changes with different growth phases in a tree's life, being highest in the middle years and then slowly decreasing with age. The point at which the MAI peaks is commonly used to identify the biological maturity of the stand and its readiness for harvesting. Associated facilities include aircraft landing facilities, boat docks, and heliports. Meridian lines are also etched into the bearing plate on a compass.
Stands often create microclimates.
For example, the microsites created by a rock outcrop with thin soils, or the shaded and cooled areas created on a site by the presence of slash. Usually contains less than 20 percent organic matter. Often multiple use planning sacrifices the production of the individual resources in favour of the over-all mix of resource uses that brings the greatest social and economic benefits. It is usually considered to be beneficial to the associated plant.