Organic food is booming. So why are organic grains lagging behind?

After years of dynamic growth, organic food accounts for more than 5 percent of U.S. grocery sales, with dairy and eggs ringing up $1 in every $7 of the estimated $49 billion in organic food sold annually. Yet, the amount of farmland devoted to organic grain, needed for feeding livestock, is expanding slowly, according to a trade group report, and totals far less than 1 million acres, nearly invisible among the 910 million acres of land in U.S. farms.