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Sh. S. Al-Saadon A, M. Muhawish N. Effect of Plant Spacings and Level of Boron and Nitrogen on Concentration of some Nutrients in Leaves and Floral Heads of Broccoli (Brassica oleracea var. italica Plenck) in a gypsiferous soil. BERJ [Internet]. 2021 Mar. 1 [cited 2025 Oct. 26];17(1):955-80. Available from: https://moss.uomosul.edu.iq/index.php/berj/article/view/39054