The cultivation of winter type safflower is limited by long growth period and low .yild potential . In this investigation some important agronomic characteristies such as yie4d components , grain yield and oil content of 12 type winter and 16 spring type of safflower were compared in a randomized complete block design.
The selections Zargban - 279 and 14-4 showed the highest yield , among the winter and spring types, respectively.
Safflower has a long growth period and needs about 300 days to maturity in some winter type varieties.ln this regard the varieties Arak- 2811 and Zarghan - 279 which showed good adaptibility were chosen to determine the best time of harvesting , in above mentioned experimental trials.
After the end of flowering , 9 harvesting time with one week intervals for winter type and 4 harvesting times for spring type were considered.
Means for each trait were compared by dunken’s multiple- range test. The results of the eperiment indicatied that 21 days after the end of flowering is the best harvest time for both types.
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