Finally, proof that strange crop formations are being created by visitors from the sky. Swissair used a field under a flight path into Munich Airport to plant barley in the shapes of its logo,Web site and a plane. The color changes during the course of the season. The red and white colors were added in natural pigments. The Artfield images are the work of a Munich artists colony called Botanikum. Heinrich Bunzel created the Swissair designs. Ad agencies Advico Young & Rubicam
, Zurich, and Mediahaus Strobel, Duesseldorf, also were involved.