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.
Four crop growth areas to ensure a correct crop rotation every year (switch between green area and yellow area) and to avoid the effects of drop shadows on the crop trial (at least 35 m). (A) No rain position; (B) position during a raining event.
