China's food giant COFCO is in advanced talks to take full ownership of Noble Group's agribusiness, a move which would cement its newfound strength in global agriculture markets and help bolster Noble's balance sheet. The sources said COFCO was in talks to buy the remaining 49 percent of Singapore-listed Noble's agribusiness for around $700-$750 million, having already acquired a 51 percent stake in April 2014 for $1.5 billion.