EVALUATION OF SPRING RAPESEED (BRASSICA NAPUS L.) CULTIVARS FOR DIFFERENT PLANTING DATES AND IRRIGATION REGIMES - A. H. Shirani Rad; Z. Bitarafan; F. Rahmani; T. Taherkhani; A. Moradi Aghdam; S. Nasr Esfahani (Journal of Animal and Plant Sciences, 2014)