Online Ethics Commission records show the contribution was made earlier this week to Missouri’s Food for America. The money could significantly boost the opposition effort, because the committee had just a little over $35,000 in its account at the start of July.

The Aug. 5 ballot measure is backed by many of Missouri’s agricultural commodity groups and businesses. The supporting group Missouri Farmers Care had $478,000 available at the start of July.

The right-to-farm amendment was put forth partly as a response to a successful 2010 ballot measure backed by the Humane Society that imposed tougher restrictions on Missouri dog breeders.