Figure 2. Dynamics of apple orchards area and production (A) and age distribution of the orchards (B) between 1990 and 2010 in China [data source: Editorial Committee, 1991;1996;2001;2006;2010].
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.