Chicago wheat rose for a fifth session to hit a four-month high, with gains fuelled by dry weather in parts of the U.S. Plains and short-covering by investors. The gain in wheat prices is more to do with dryness in U.S. Plains. For beans, there was dryness in Argentina earlier and now rains are expected to delay the Brazilian harvest. Condition ratings for winter wheat declined in January in several southern U.S. Plains states that have been hit by drought, including top producer Kansas.