%0 Conference Proceedings %T Allelopathic Effects of Sunflower (Helianthus annuus) on Germination and Initial Growth of Redroot Pigweed (Amaranthus retroflexus) and Common Lambsquarter (Chenopodium album). %A Mohammad Reza Roostanejad %A Forough Abbasi %A Ghorbani, Reza %A Mohammad Bazoobandi %J 5th International Weed Science Congress %D 2008