Abstract
A field experiment was carried out at two sites (Erbil and Mosul) in winter season 2017-2018, to study the effect of three different seed size (small, medium and large) of local broad bean planted in three sowing depths (5, 10 and 15 cm) using three levels of phosphate fertilizer (zero, 75 and 150 kg P2O5. ha-1) in yield and yield components. The experiment executed according to the (R.C.B.D) design and Duncan Multiple range used to compare between treatment means. The results showed that there was no significant effect of seed sizes in most studied traits; The pod length, 100 seeds weight and seeds yield were surpassed at depth (15 cm) at both sites. The number of pods / plant, 100 seeds weight, seeds yield, and biological yield increased significantly at the second and third fertilization levels at both sites. Pod length, number of seeds / pod and harvest index have exceeded significantly in the second level of fertilization at both sites. The second order interactions showed significant differences between most studied characters.
A field experiment was carried out at two sites (Erbil and Mosul) in winter season 2017-2018, to study the effect of three different seed size (small, medium and large) of local broad bean planted in three sowing depths (5, 10 and 15 cm) using three levels of phosphate fertilizer (zero, 75 and 150 kg P2O5. ha-1) in yield and yield components. The experiment executed according to the (R.C.B.D) design and Duncan Multiple range used to compare between treatment means. The results showed that there was no significant effect of seed sizes in most studied traits; The pod length, 100 seeds weight and seeds yield were surpassed at depth (15 cm) at both sites. The number of pods / plant, 100 seeds weight, seeds yield, and biological yield increased significantly at the second and third fertilization levels at both sites. Pod length, number of seeds / pod and harvest index have exceeded significantly in the second level of fertilization at both sites. The second order interactions showed significant differences between most studied characters.
Key words: broad bean, yield, sowing depth, phosphorus fertilization.
