@article{ahmad_Mustafa_Muhammed_Rashed_2018, title={Impact of clipping dates and nitrogen application on yield and yield components of two six-rowed barley at two location of Sulaimani District}, volume={5}, url={http://journals.uokerbala.edu.iq/index.php/Agriculture/article/view/344}, DOI={10.59658/jkas.v5i4.344}, abstractNote={<p><strong>Abstract</strong></p> <p>A field experiment was conducted under rainfed conduction of Bacrajo and Bazian locations (Iraq-Kurdustan region) during 2015-16 cropping season. The experiment consisted combinations of four cutting schedules (no clip, 80, 105, and 130 DAS), two barley varieties (Ibba-99&nbsp;&nbsp; and Local variety) and two fertility levels (N 40 and 80 kg/ha<sup>-1</sup>). These 16 treatment combinations were evaluated under factorial randomized block design with three replications. Results revealed that application of no clip, Ibba-99 variety and N 80 kg ha<sup>-1 </sup>fertilizer as alone or in combinations significantly (<em>P </em>0.05) increased almost all growth parameters, in most cases led to significant (<em>P </em>0.05) increases number of spike m-<sup>2,</sup> number of grains spike<sup>-1</sup>, 1000 grain weight, HI, and gave the highest biological and grain yield at the two locations. Clipping systems, varieties and N levels as alone or in all possible combinations (two and three-way interaction) had significant (<em>P </em>0.05) effects on &nbsp;&nbsp;grain yield. The highest grain yield for C<sub>0</sub>, Ibaa-99, N 80, C<sub>0</sub> x Ibaa-99, C<sub>0</sub> x N 80, Local var x N 80 and C<sub>0</sub> x Ibaa-99 x N 80 were 4.351, 2.447, 2.509, 4.884, 4.782, 2.523 and 5.127 t ha<sup>-1</sup>, respectively at Bakrajo location, while at Bazyan location for C<sub>0</sub>, Ibaa-99, N 80, C<sub>0</sub> x Local var, C<sub>0</sub> x N 80, Local var x N 80 and C<sub>0</sub> x Local var x N 80 were 5.311, 3.814, 5.817, 5.551, 3.895, 3.938 and&nbsp; 6.216 t ha<sup>-1</sup>, respectively. The best grain yield for dual purpose barley at three-way combinations with C<sub>1</sub> x Local var x N 80 were 4.043 and 5.770 b t ha<sup>-1</sup> at Bakrajo and Bazyan locations, respectively. For that, application of C<sub>0</sub> x Ibaa-99 x N 80 and C<sub>0</sub> x Local var x N 80 combinations at at Bakrajo and Bazyan locations, respectively may be the best option to achieve high grain in quantity, while C<sub>1</sub> x Local var x N 80 at the two locations for dual purpose barley may be the best option to achieve acceptable grain and forage in quantity under guaranteed rainfed Iraq-Kurdustan region.</p>}, number={4}, journal={Journal of Kerbala for Agricultural Sciences}, author={ahmad, maki mohammed and Mustafa, Kamil Mahmood and Muhammed, Sanarya Rafiq and Rashed, Almas Galal M.}, year={2018}, month={Dec.}, pages={7–23} }