* Spring wheat acres seen rising sharply from a year ago, when flooding in the northern US Plains curtailed planting efforts. * USDA forecast US wheat plantings at 58 million acres, up 3.6 million acres from 2011. USDA pegged world wheat stocks at record 213.1 million tonnes. * International Grains Council raised forecast for world wheat production by 5 million tonnes to record 695 million tonnes. World stocks seen at record 211 million tonnes, according to IGC forecast. * Analysts expecting weekly USDA report to show export sales of wheat in range from 500,000 to 900,000 tonnes compared with 427,900 tonnes in the prior week. * Spain bought 85,000 tonnes of US wheat to use as animal feed but additional cargoes in doubt because of competition from European and Black Sea countries. * Iran bought 800,000 tonnes of wheat from Russia and Australia and paid a premium over international prices, European traders said. * Tunisia bought 50,000 tonnes of optional-origin soft wheat for $291.91 to $295.65 a tonne, including cost and freight. * Iraq bought 400,000 tonnes of Canadian wheat in a tender for 50,000 tonnes for $350.45 to $360.25, including cost and freight.