Nationals urge FIRB to block GrainCorp takeover ARCHER Daniels Midland executive chairman Patricia Woertz's pitch to shareholders, grain growers and regulators for a $3.4 billion takeover of GrainCorp has suffered a setback, with the Nationals urging the Foreign Investment Review Board to block the bid. Nationals leader Warren Truss warned that approval of the deal would leave most of Australia's grain export infrastructure in the hands of foreign companies and said farmers could be forced to pay higher grain-handling charges to make the deal pay.