Fig. 4From: Enhancing nitrogen use efficiency and yield of maize (Zea mays L.) through Ammonia volatilization mitigation and nitrogen management approachesEffects of applying S from gypsum and S-coated urea on biological yield, grains yield and on stover yield. Bars are means of three replicated ± SE. Variable letters on bars show significant changes (p ≤ 0.05; Fisher LSD)Back to article page