Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of a unstandardized basal area chronologies of Picea abies age classes with b tree establishment. Sample size in a is ≥ 10 trees in each age class. Data were smoothed based on fast Fourier transform low-pass filter, whereby the number of points was set to 20.
