Fig. 4From: Enhancing maize growth through the synergistic impact of potassium enrich biochar and spermidineEffect of treatments on number of leaves (A), leave fresh weight (B), and leave dry weight (C) of maize cultivated under 0KBC and 0.50KBC. The means of four replications are represented by the bars, with standard error. Tukey test results that used different letters on bars indicated significant differences at p ≤ 0.05Back to article page