An official website of the United States government
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
LockA locked padlock
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Image Number D1980-1
In a field of rolled cereal rye, ecologist Steven Mirsky evaluates ground coverage of the rye mulch and weed emergence through it.
Photo by Matthew Ryan.
640 pixels wide: (d1980-1.jpg)