Grain and soy futures prices were lower as the overnight session ended and again as the day session opened. However, when March corn failed to break below technical support at $3.50, it brought out enough short covering to produce a mini-rally. General Comments World markets were rattled overnight by North Korea’s announcement that it had successfully exploded a hydrogen bomb for the first time. It already possesses smaller nuclear weapons, but the addition of such a powerfully destructive device to the arsenal of such a “loose cannon” country is unnerving. However, monitoring by the U.S. and other nations has subsequently raised doubts that this test actually involved a hydrogen bomb. It was more likely a lesser nuclear weapon, according...