ملخص البحث :

Abstract A field experiment was conducted in one of the private farms in Kutha, district in Babylon governorate- Iraq for the autumn season 2018 in a loamy soil. The current study aims to investigate the effect of poultry waste with three levels (0,10,20 t.ha-1) and dap fertilizer in three levels (0, 200 ,400 kg.ha-1) in some soil physical and chemical properties. Besides, the growth and yield of potato plant var. safrane. Using the randomized complete block design( RCBD) with three replicates. The results showed that adding poultry waste to the soil had a significant effect on soil physical and chemical properties, while the chemical fertilizer did not affect these properties. On the other hand, the interaction between the two factors showed a significant effect on these properties and the vegetative, productive characteristics of the plant. Thus, the interaction of the level (20 t.ha-1) of Poultry waste with (400 kg.ha-1) of Dap fertilizer achieved the highest mean weight diameter MWD (1.34 mm), moisture content (19, 20%), lowest average bulk density (1.28 Mg.m-3), electrical conductivity (2.93 ds.m-1) and the ph (7.4). It also gave the highest average for the number of branches (3.88 branches . plant-1), the leaf area (59.68 dm2.plant-1), the yield of one plant (0.598 kg.plant-1). In addition to the total yield (24.48 t.ha-1) compared to (0.53 mm) (14.50%), (1.41 Mg.m-3), (3.44 ds.m-1), (7.60), (2.80 branches . plant-1), (47.13 dm2.plant-1) and (0.417 kg.plant-1) and (18.25 t.ha-1), respectively, in the comparison treatment. Keywords: Poultry Manure, Dap, Potato, Solanum Tuberosum L.