Areas affected are small and scattered. There is major mortality within the stand. Large, continuous areas have rising mortality and loss of vigor in the stand. Because spacing of selected crop species is dependent on diameter of the crop trees and the site index of the site, a forest inventory and a calculation of the site index must be done before this section can be completed. There is no loss sustained to the stand.
Economic threshold is used to determine treatment methods.
Loss sustained is only one year s growth. Economic threshold is used to determine treatment methods. Economic threshold is not used to determine treatment methods. There is adequate understory reproduction to maintain a mature stand. No roots are exposed due to excessive grazing by livestock.