No abstract

X-ray microdensitometry and ultrasonic velocity were used to study radial variation of selected physical properties in wood of Pinus taeda. The analysed physical properties were earlywood and latewood density and stiffnesses in longitudinal and tangential anisotropic directions, calculated as the square of velocity multiplied by density. X-ray microdensitometry was used to measure earlywood and latewood density. Ultrasonic direct transmission velocity was used to measure velocity in longitudinal and tangential directions, in earlywood and latewood, in each ring.