A comparison of four methods for determining leaf area index in successional hardwood forests

摘要: Four methods of determining leaf area index three successional hardwood forests in northern lower Michigan were compared. Direct harvests gave values for ranging from 1.4 to 3.6. Estimates derived litter fall data consistently higher than the harvest and highly dependent on ratio mass, which had be estimated. A visual method using sightings through a tube (by 27–42%) values. Calculations based regressions mass versus tree diameter results very close each site as whole; calculations smaller plots more variable. The allowed measurement vertical distribution area; other could not do so.