• Owston, P. W.
  USDA: Pacific Northwest Station
  
• Greenup, M.
  USDA: Pacific Northwest Station
  
• Davis, V. A.
  USDA: Pacific Northwest Station
  

Systematic, long-term measurements of the survival and growth effects of releasing crop trees from competing vegetation are important for evaluating vegetation management treatments in forest plantations. This report details field-tested procedures for use in any type of release treatment-mechanical, manual, biological, or chemical. The basic concept is to delineate one untreated plot within each plantation to be monitored and to compare survival and growth on that "control" plot with survival and growth on a treated plot that is similarly delineated. Each installation should be examined periodically for a 5- to 10-year period. Sample data forms with part¡ally completed examples are included.