Abstract
The study was carried out in Sulaimani region at Qliasan location during the winter season of 2019-2020. A factorial experiment was conducted by using randomized complete block design with three replications. It was aimed to evaluate the effect of three sowing dates on growth, yield, and its components of grass pea varieties under rainfed conditions of Sulaimani Region. Three levels of sowing dates: 15th October (S1), 1st November (S2), and 15th November (S3) 2019 was applied for four varieties of grass pea (IF003, IF133, IF102, IF067), originated from different regions. The results of the experiment showed significant values for plant height (59.391cm), days to 50% flowering (125.307), days to maturity (174.333), seed yield (4013.920 kg ha-1) and biological yield (18004.514 kg ha-1) at the third sowing date (S3). The second sowing date resulted in the highest no of pods plant-1 (27.417) harvest index (0.403). The first sowing date had recorded the highest number of seeds (4.333) and seed yield (5599.141 kg ha-1).
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