RPT-FOCUS-Corn as cash: Brazil's bartering farmers raise risks for Canada's Nutrien

(Repeats with no changes to text) By Rod Nickel and Ana Mano WINNIPEG, Manitoba/SAO PAULO, March 12 (Reuters) - Taking a page from its aggressive growth strategy in the United States, cash-rich Canadian fertilizer giant Nutrien Ltd plans to plow investment into Brazil in a bid to reap up to 30 percent of farm supply sales in fertile pockets of the country. But business in Brazil's farm sector - the world's fastest growing - strays far from the usual practices in North Amer