highly significantP ≤ 0.001
Leaf area [ cm 2 ] : The interactions of Azolla and nitrogen fertilizer on leaf area were highly significant ( P ≤ 0.001) ( Table 1 S).
Leaf area [ cm 2 ] : The interactions of Azolla and nitrogen fertilizer on leaf area were highly significant ( P ≤ 0.001) ( Table 1 S).