Fig. 3.
Standardized container index (SCI) used to account for differences in underlying block cluster areas and therefore differences in the number of containers present for sampling.
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.