* Corn seen up 15-30 cents on bullish USDA data
* Soybeans called up 35-45 cents, wheat seen up 10-20
* USDA corn, soy stocks data bullish, to offset acreage
* Wheat seen following corn, soy despite bearish USDA data
CHICAGO, March 31 (Reuters) – U.S. corn futures wereforecast to surge by as much as the 30-cent daily trading limiton Thursday after a government report showed quarterly stocksshrunk more than expected, offsetting pressure from ahigher-than-expected spring corn seedings outlook. Soybeans were called to open 35 to 45 cents per bushelhigher on the U.S. Agriculture Department’s bullish soy stocksestimate and as farmers were expected to plant less of the cropthis spring. Wheat was called 10 to 20 cents higher on spilloverstrength from bullish corn and soybeans, offsetting a bearishstocks estimate and a larger-than-expected jump in the USDA’sspring wheat seedings forecast.