http://prismwebcastnews.com/2008/09/02/scientists-discover-key-to-cold-tolerance-in-corn-longer-growing-season-growth-in-colder-regions-possible-for-tropical-crops/ Ecology, Sustainability, Equality, Democracy, Peace Tue, 22 May 2012 10:24:26 +0000 http://wordpress.org/?v=2.5.1