Quoted: ?Rents will be highest in those areas where we can get the highest return from the crops,? said Bruce Jones, a professor of agriculture economics at University of Wisconsin-Madison. ?So the southern tier ? maybe Rock County and Dane County ? tend to have higher rents. As you get further north, where productivity of the land is a little less and climate is less conducive to row crops, you see a fall off of rents farmers have to pay in those areas.?