A crop circle that mysteriously appeared in a Monterey County barley field over the weekend, was mowed down today.   The design was first noticed early Sunday morning on a Chualar farm, off of Chualar Canyon Road.   Security Guards say the Field’s landlord said it was becoming a “nuisance” after drawing hundreds of people to the site.   The design covered about an acre, and looked like a strange computer chip with dots in the middle that experts say are braille symbols for the numbers 1 9 2.  So far, there is still no word on how the crop circle came to be.