South American soybean prices moved lower last week, prompting U.S. exporters to take steps to remain competitive. Meanwhile, Argentine corn exporters are being squeezed by three factors. Soybeans Brazil The soybean market was quiet last week after the strong movement of the past few weeks. Chinese demand decreased as lack of origination made offers less aggressive. Nevertheless, the modest rally in CBOT futures allowed some spot offers to come out of Brazil. September shipments were offered at $1.00X FOB and $1.78X CNF China. Brazil traded some March new crop cargoes at $1.35-1.36H CNF at the beginning of last week, but the market was quiet afterward. Today March is offered at $1.36H and April at $1.29K.The Brazilian offers prompted U.S...