I’ll just quote Sponbustion:

“Norwegian farmers daughter Silje Eugenie Strande Øktner (21) has ditched her sketchbook in favor of a tractor and a field. When given an open assignment in art school, Silje went home to the farm and started plowing images of animals onto the field. This has resulted in an exhibition she has named “Animals I Have Knownâ€? after a Cora Sandel book. She has just finished a cow, a pony and a pig, and she is going to make another cow, a hen and a bunny. Although the art is slightly visible from the ground she recommends viewing it from the air.”