Jeff Peterson, president of Heartland Farm Partners in Lincoln, breaks down today's commodity trade.Topics:Why do you think we are seeing the soybean market higher today and the corn market is lower?How do you feel about the corn and soybean markets overall?Are the funds playing much of a role in the markets at this time?What do you think about the United States Weather at this time?How does South American weather look?How is corn demand?Is the soybean demand doing okay?What are the keys to watch going forward?