A study of Three Planting Dates and Spraying with Zinc, Boron and Polyamine (Putrescine) on the Growth and Yield of Broccoli

Abstract The experiment was carried out in the field to study three planting dates during two winter agricultural seasons 2020-2021 and 2021-2022 Anbar Governorate / Fallujah District, 60 km west of Baghdad on banks Euphrates River. factorial included 18 treatments using a experimental within split-plot, according randomized complete block design, were placed main plot, zinc boron factor subplot, putrescine sub-plot randomly distributed with replications, so became 54. results showed that second date superior plant height, leaf area, flower disc weight, diameter, total yield discs, as it gave highest rate 84.90, 81.25 cm, 170.09, 169.64 dm 2 plant, 1.071, 1.243 kg, 19. 60, 19.57 34.55, 37.38 ton ha -1 for seasons, respectively. While triple interaction between factors superiority plants grown first characteristics flowering which reached 87.51, 85.05 182.36, 182.87 1.122, 1.243. 20.39, 20.04 39.00, 42.96