2015 Iowa Prairie Conference Sponsors:$5,000 or more:www.iowadot.gov/lrtf$2,500 - $4,999:www.iowaenergycenter.orgwww.leopold.iastate.edu$1,000 - $2,499:www.iowaprairienetwork.orgwww.truaxcomp.com$500 - $999:iowanativeplants.orgwww.shootingstarnativeseed.com