Some great suggestions, thank you. Just a few questions for clarification.

Should I pour the sour corn into the hole a week before I plan to hunt the area or will they find it if i do it the night before.

Is the purpose of covering the corn with dirt to keep them from eating it all in one night?

I have lots of cows on the property. Will they eat the sour corn or should I run a strand of barb wire? Maybe the hole/dirt will keep the cows out??