بررسی مناسب ترین تاریخ کاشت ارقام کلزا در منطقه ورامین

In order to Assessmeut of sowing dates effect on some rape seed cultivars and varieties thes study was perforaned in split plot based on RCBD in three replications in Tehran Agreculture research center in varamiu region. sowing dates and varieties were as main and sub factors respectively. Results showed that,sowing dates,varietes and their interaction had significant difference and the first seeding date ( 12-october ) had the highest grain yieid with 3030/98 kg/ha and hayola-401 varietes with 2955/44 kg/ha and the first sowing date and RGS003 and the second seeding date (27-septamber) interaction with 3369/3 kg/ha showed the highest grain yield.