عبد القادر, صالح2024-10-252024-10-252020https://dspace.omu.edu.ly/handle/123456789/431Two experiments have been conducted in two different agricultural development regions, namely Al-Baida and Shahat for one growing season 17/2018, to study the evaluation of Aquacrop model and different sowing date on two and six-row barley varieties at the two regions. The experiments were laid out in split split plot design using a randomized complete block arrangement with three replications and three factors. The size of each plot was 2m x 4m. The results could be summarized as follows: The six-row barley B-85 variety gave the higher crop yield, of 0.582 and 0.259 t/ha in Shahat and Al-Baida, respectively. The lowest in productivity for variety B2-2 was a two-row. The yield showed significant differences at (p˂0.01), which increased by 53.4%. All data obtained showed significant differences between rain-fed and irrigation and increased the yield the irrigated by 7.6 % in Shahat, while, in Al-Baida 9.2 %. The rainfall reached 509.04 mm in Shahat, while it reached 496.3 mm at Al Baida during from the season. Results showed that the soil mechanical analysis that its texture is loam soil with a good ability to retain water, the field capacity valued (23-33 %), improved field capacity so it has more capacity to hold water. The biological crop in Shahat increased by 69.7 % compared to Al-Baida, 4.548 and 1.379 t/ha, respectively. The high protein content for the six-row B-85 variety is 8.833% and increased by 16.2% compared with Shahat two-row B2-2. For Shahat and Al-Baida, the protein content is also 4.3% and 6.9% more irrigated than rain-fed. The determination coefficient was 96.6 % of the increase in grain yields due to the increase in field capacity, while 3.4% was due to other factors in Shahat, while the determination coefficient for Al-Baida was 76.6%.Thesis