US Agriculture Secretary Sonny Perdue has said he wants China to keep buying US agricultural products despite the recent tariff increases, adding that if Beijing retaliates it will prompt Washington to offer more support to its farmers.“Our biggest goal will be for China not to retaliate and stay at the table to negotiate a good deal,” Perdue told Bloomberg News on Sunday, adding the US will respond if China retaliates.President Donald Trump said on Friday the US will boost its purchases of…