Fig. 4From: Effect of hemoglobin on the growth and Cd accumulation of pea plants (Pisum sativum L.)Growth of Pisum sativum in the Cd-contaminated soil [6.0 ± 0.61 mg Cd (kg soil)−1] at hemoglobin (Hb)-to-Cd molar ratio of (A) 0.000 (No Hb addition), (B) 0.001, (C) 0.009, and (D) 0.015Back to article page