Chicago wheat gained more ground, trading near last session two-week high on worries about dry weather threatening production of high-protein wheat in the United States. CBOT most-active wheat contract rose 0.7 percent to $4.38-3/4 a bushel, having climbed to $4.40-3/4 a bushel, the highest since May 22. Spring wheat damage and poor conditions for the hard-red winter wheat in the U.S. because of harsh weather.