Study of autumn sowing of sugar beet in the tropical areas of kermanshah province

Sugar is very important role in humanbeing feed. for sugar Beet production in tropical area detemine sowing and harvesting date is very important. For this reason three sowing date (1 sep, 20 sep and 10 oct) and three harvesting date (15 Apr, 15 may and 15 jun) in complete Blouck design as factorial with three replication in two year in Sarpol area condoucted. Results showed that the first sowing date has highest bolting and third sowing date has lowest bolting. Thirs harvest date has highest level of bolting. Root yield in the first sowing date more than the other. Interaction between two factors showed that 1 Sep sowing date * 15 May harvesting date for root yield was very better than the other interaction factors. The best date of sowing in this area was until 20 Sep and for date harvest was 15 May. For development of sugar beet caltivated in this area need to more investigation.