In the 1980s, a film crew came to Iowa to film “Field of Dreams”, carving a baseball diamond out of a corn field:

The look of the new ball field itself didn’t inspire confidence: because of a nasty regional drought, the landscape, typically lush, had turned brown and fallow. To make the farmland presentable, the crew was forced to irrigate, but even that didn’t fix the problem fully. Right before filming began, Robinson decided, in desperation, to paint the cornstalks and portions of the grass green.

That’s Adam Doster in the Atlantic, h/t to Brett Walton