Wheat increased by the most in almost 2 weeks on Wednesday amid signs that demand for U.S. supplies from overseas increased, while corn advanced as Chinese purchases rose and soybeans gained. Wheat for July settlement added 1.5% to $6.9075 a bushel by 10:06 a.m. on the CBOT, whereas corn July futures gained 2.3% to $6.5075 a bushel and Soybeans for July delivery jumped 0.3% to $14.82 a bushel.