, during the growing season of 2017, to study the effect of sowing date on some growth parameters and yield of chickpea. A factorial experiment based on randomized complete block design (RCBD), with three replicates was used, sowing dates (January 20, February 9, March 1, and March 21), and two cultivars of chickpea (Rafidain and Gab) were implemented. Sowing at January, 20 produced the highest plant height (43.0 cm), leaf area (797.83 cm 2), leaf area index (2.66), dry matter (38.06 g m-2), crop growth rate (7.90 g m-2 day-1), number of primary branches plant-1 (3.55), number of pod plant-1 (21.60) and seed yield (2.160 t ha-1). On the contrary sowing at March, 21 recorded the lowest of all above studied characteristics, also Gab cultivar surpassed the Rafidain cultivar in all characteristics studied except no. of seeds plant-1 and 100-seed weight. From interaction sowing date with cultivars recorded the highest of all characteristics studied at sowing date January, 20 with Gab cultivars as well as Rafidain cultivar recorded the lowest of all studied characteristics at sowing date March, 21. There was positive highly significant correlation(r= 0.869) between seed yield and their components; no. of pods plant-1, no. of seeds pod-1 and 100seed weight (r= 0.869, r= 0,810 and r= 0.706) respectively.

A field study was conducted at Grdarasha Research Station of the College of Agriculture/Salahaddin University, Erbil, during growing winter season of 2017, to study the effect of plant spacing on some yield and quality of chickpea varieties. The factorial experiment was applied in "Randomized Complete Block Design" (RCBD), in three replicates, by using four plant spacing (6, 9, 12 and 15 cm), and three varieties of chickpea (Rafedain, Gab and TH85) were implemented. The 15 cm plant spacing produced the highest number of primary branches per plant (4.34), number of pods per plant (15.44), seed yield (1124.33 kg/ha), protein percentage (23.12), protein yield (247.19 kg/ha), and oil percentage (11.81). On the contrary, the 6 cm plant spacing recorded the highest value of carbohydrate percentage (60.91); also, Gab variety exceeds Rafedain and TH85 varieties in number of primary branch per plant (4.07), number of pods per plant (11.71), seed yield (1120.91 kg/ha), protein percentage (22.25), and protein yield (250.26 kg/ha), but the TH85 gave the optimum oil percentage (11.14) and carbohydrate percentage (59.84). From the interaction of plant spacing with varieties, the highest rate was recorded at 15 cm plant spacing with Gab variety seed yield (1192.85 kg/ha) and protein yield (297.16 kg/ha). There was a positive and negative correlation between yield and number of pods per plant and number of seeds per pod (r = 0.673 and 0.689) and between carbohydrate percentage with protein and oil percentages (r = −0.777 and −0.658), respectively.