Serve your country enlist under kernel corn : grow corn = Michigan's greatest war crop ... kernel corn's code of arms ... grow corn! bumper crops mean victory and prosperity
The pattern
This still sits in the public-domain pool. No pattern name yet.
Why it works
The poster used military enlistment tropes to recruit state farmers into maximum corn acreage. It transformed agricultural planning into a patriotic mobilization campaign, validating farmer labor as national defense.
Steal this when
Steal this when asking local suppliers or contractors to increase production quotas by framing their output as vital civic service.