Growth Response and Yield of Maize (Zea mays L.) for Levels of Slow Nitrogen Release

Abstract The experiment carried out during season (2021-2022), in two locations first the village of “Abu maria” Tal Afar District (51 km) western Nineveh Governorate, and second location was Hamidat district “Badoush” (20 northwest aim studying response growth yield Cultivars Maze (Dragma Sengunto) for Slow Nitrogen Release fertilization (SNRF) at levels (0, 15, 30, 45 kg.ha −1 ) recommendation ministry agriculture (95 urea 50 kg di-ammonium phosphate – DAP per ha ), designed with Complete Randomize Design (RCBD) split-plot, as cultivars were main plots, while fertilizer treatments subplots, most important results summarized follows: There significant differences between vegetative characteristics both in: (Male Flowering, Female Flowering), recorded characteristics: (plant height cob height). (30 height, number leaves study, mentioned “Badush” Flowering Leaf Area). interaction Fertilizer (“Sungunto” Fertilization level Plant locations, While there leaf area. Regarding its components, where significantly different yield, (30, kg. superior all components locations. In (SNRL), non-significant Maria” components. However, “Badoush”, rows cob. quality (protein percentage, protein), a difference protein percentage “Badoush”. Study (SNRL) levels.