The students and administrators at the Sheridan School took their war gardening efforts quite seriously. The sign makes this crystal clear:

Trespassers, Destroyers and Thieves
Beware $100 fine - One year imprisonment
Dogs are subject to the law-Keep them off.
Note that it was a windy day when this shot was taken, judging by the flag in the background.
Hank Will raises hair sheep, heritage cattle and many varieties of open-pollinated corn with his wife, Karen, on their rural Osage County, Kansas farm. His home life is a perfect complement to his professional life as editor in chief at GRIT and Capper's Farmer magazines. Connect with him on Google+.