No doubt it is rising my friend. In the garden I got to using fishing line strung up like an electric fence on T posts. Wherever I read about it said they are unable to see the little line and it spooks them when they walk into it. I have watched them do a routine where they are standing there and the head is bouncing up and down where they want to jump it. It can go on for several minutes like a strange dance. It is just light weight line, happened to be the cheapest I could find on a big spool, looks like 4 or 6 lb test. I role it up on sticks and reuse each year. It has kept them out for 5 years now. They readily jump into the livestock fields that are electric fence, so I guess what I read about them not being able to see mono is true. I put the mono about every foot on a 6 foot t post.
For a weed reduction if you disk: Cut the ground. Allow 2 weeks for germination then cut the ground again and plant that day. There are still going to be weeds but at least you have killed the majority of the weeds by burying. Also a cover crop of a cheap nitrogen fixer like buckwheat or cowpeas could keep your weeds down and feed the corn a little. Not to mention feed the deer.