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This experiment was conducted in Kirkuk provinceIraq in a private nursery, during the spring season of 2019, to study the effect of spraying with a liquid nitrogen fertilizer at concentrations (0, 2 and 4) ml/litre and three concentrations of zinc (0, 200 and 400) mg/L. Each of them on the vegetative growth trait of Citrus aurantium seedlings and the effect of the interactions between the studied factors on the vegetative growth trait and leaf content of macronutrients (NPK) and carbohydrates. The results obtained can be summarized where the spraying with liquid nitrogen fertilizer and zinc led to a significant increase in the vegetative growth trait and the leaf content of the macronutrients (NPK) and carbohydrates of the Citrus seedlings, which led to significant increases in (leaf area, dry weight of leaves, leaf content of nitrogen, phosphorus and carbohydrates). The bi-interactions of the studied factors had a clear significant effect in improving most of the vegetative growth trait and the concentration of nutrients and carbohydrates in the leaves.

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EFFECT OF SPRAYING BY FERTILIZER LIQUID NITROGEN AND ZINC ON SOME TRAITS OF VEGETATIVE GROWTH CHARACTERS AND INFECTION RATE OF CITRUS LEAVES DIGGER ON SOUR ORANGE SEEDLINGS (CITRUS AURANTIUM L.)