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The aim of this study was to determine the effect of spraying the nano-boron on the concentration of certain nutrients, chlorophyll in the leaves and dry matter of plants of two faba bean cultivars. The field experiment was carried out in one of the agricultural fields of AlMuthanna Governorate in Iraq (30°12'N, 45°21'E) during the seasons 2016/2017–2018/2019. The experiment was carried out in a dependent, split-plot system, in triplicate, where the first-order factors were cultivars (‘Aquadlegi’, ‘Aquadols’), and the second-order factor was boron fertilization (5, 10 mg·dm and control object without boron fertilization). Foliar fertilization with boron at a concentration of 10 mg·dm increased the content of nitrogen, phosphorus, boron and chlorophyll in faba bean leaves and dry matter content of plants, as compared to the control object. The chlorophyll content in faba bean leaves was significantly increased only after using a double concentration of nano-boron in the sprayed solution compared to the control object. The ‘Aquadols’ cultivar was characterized by higher content of dry matter, nitrogen and chlorophyll in the leaves than the ‘Aquadlegi’ cultivar. Depending on results, we can recommend applying a twice supplementation of faba bean with nano-boron fertilizer at a concentration of 10 mg·dm in a broad agricultural practice.

Effect of nano-boron spraying on the concentration of some nutrients in leaves and dry matter of two Vicia faba L. (Partim) cultivars