Firouzi,, H., Mirshekari, B., Khorshidi Benam, M.B. (2011). Assessment of Interference of Growing Period of Amarant (Amaranthus retroflexus L.) and Lambs Quarter (Chenopodium album) on Yield and its Components of Rapeseed. *Journal of Crop Ecophysiology*, 5(18), 1-10.