Fig 2. Chlorophyll a and b (mg g^-1 FW) contents affected by biochar application under drought stress at critical growth stages of wheat.

CK, DTS, DFS and DGFS indicates control, drought at tillering, flowering and grain filling stages respectively. BC₀, BC₁ and BC₂ indicates control, 3% and 5% biochar respectively. Error bars indicates standard error (n = 4).