I find that to be unlikely. The Commodity Credit Corporation under the USDA, Americold Corporation, the surplus retained for emergency foreign food aid, etc., all still point to vast ongoing storage.
Importantly, it may not currently be directly *assigned* to price stabilization surplus, but it can all be shuffled around for whatever purposes are needed. A collapse of the EBT system would be one such purpose.
A grain reserve would be invaluable during droughts
“This raises the question whether a strategic grain reserve needs to be established, much like the strategic petroleum reserve, for use in times of major supply disruptions. The United States maintained such reserve stocks of grains in the past. Over time, these grain reserve programs were discontinued largely because of cost and improved market efficiency. If future supply disruptions attributable to drought become more frequent, they may affect not only
livestock production but human food consumption as well. Some type of a grain reserve may make sense in this changing environment.”
USDA: No strategic grain reserves they sold them!
http://ppjg.me/2010/11/12/usda-no-strategic-grain-reserves-they-sold-them/
Tons more links if you care to look.
Surplus U.S. food supplies dry up
http://www.usatoday.com/money/industries/food/2008-05-01-usda-food-supply_N.htm