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Field and laboratory experiments were conducted in SC, USA, in 2004/2005 and 2006/2007 to determine the effect of temperature, light, and spring burial on Ipomoea purpurea (L.) Roth. seed germination over a 12-month period after seed maturation in the field. The seed collections used for the temperature and light studies had physical dormancy (water-impermeable), with 10–23% and 17–46% germination,...