The US devotes 51 million acres to hay for livestock feed but only 4 million to vegetables
United States Department of Agriculture, “Census of Agriculture,” 2012, Census Volume 1, Chapter 1, “U.S. National Level Data,” Table 37, “Specified Crops by Acres Harvested: 2012 and 2007,” 31-32, accessed May 28, 2015, http://www.agcensus.usda.gov/Publications/2012/Full_Report/Volume_1,_Chapter_1_US/st99_1_037_037.pdf