We grow corn all year round in our hometown. This year, our neighbors are trying to plant corn. What should we do?

Communicate and negotiate with neighbors to resolve the issue.

If it is your own land, you can negotiate to get it back. If you don't want it back, you can call the police and let the police solve the problem. This is a civil dispute.

Do not use force, but use legal weapons to protect your rights and interests from infringement.