Abstract
Field experiment was conducted during the season 2005-2006 in Singar - Mosul city to investigate the effects of high level (280 N, 260 P2O5) kg ha-1 and very high level (320 N, 300 P2O5) kg ha-1 fertilizer, pinch and without pinch, and plant seed rate sowing (0.6, 0.8, 1.0, 1.2) g/10m2 cultivated within 3, 4, 5, 6 rows respectively in (10) m2 plot area on growth and yield of Nigella sativa L. The experiment was laid out in randomized complete block design with three replications. The results indicated that. Very high level of nitrogen and phosphorus caused a significant increase in plant length, stem diameter, fresh weight, plant seed yield and total seeds yield kg/ha, were as branches number, and fruits number cannot be effected significantly by previous factor. Pinching causes a significantly increased in branches number, fruits number, while plant high decreased significantly. Increased seed rate sowing from 0.6 to 1.2 g/10m2 caused a significant increasing in branches number, fresh weight, and plant seeds yield, while stem diameter, and fruits number didn’t effected significantly by this factor except total seeds yield kg/ha which increased significantly when seed rate sowing are increased to 1.2g/10m2 and they reach 651.85, 843.56, 1076.51, 1232.67 kg/ha for the four seed rate consecutively.
