2000 · 38 citations · 0 references
Forest HealthEnvironmental MonitoringEngineeringForest BiometricsLand UseForest ConservationForestryGeographyAgricultural EconomicsForest Resource ManagementBiostatisticsTree HealthForest Health MonitoringForest InventorySocial SciencesDeforestationState Foresters
The Forest Health Monitoring (FHM) Program was initiated in 1990 as a cooperative effort between the USDA Forest Service and the National Association of State Foresters. Program efforts include detecting changes in tree health from a national grid of one-sixth acre permanent sample plots. Tree data have been collected in various states since 1991, and include species, diameter at breast height (dbh), status (live, dead, or cut), and various ratings of crown condition and damage.