Open Access Research Paper Views (877) Response of maize productivity to nitrogen fertilizer and spraying with blue green algae extract Rasha SA El-Moursy, Abido WAE, Badawi MA Int. J. Agron. & Agric. Res. 14(2), 10-20, February 2019. Keywords: Blue green algae extract, Grains quality, growth, Maize, Nitrogen fertilizer, Yield Details