Abstract
The adaptation of plants to acid soil conditions may be associated with mineral elements taken into plants. Leaf mineral element concentrations were determined in sorghum (Sorghum bicolor (L.) Moench) and pearl millet (Pennisetum glaucum (L.) R. Br.) genotypes grown on an acid ultisol (pH 4.0, 60% Al saturation) to better understand mineral element concentrations that might be associated with species and genotypic differences to tolerate acid soil conditions. Sorghum genotypes showed a broad range in grain yield while all pearl millet genotypes had relatively good grain yields when grown on the acid soil. Leaf concentrations of Si, Ca, Mg, S, and Cu were higher; P, K, and Al were lower; and N, Mn, Fe and Zn were similar in pearl millet when relative comparisons were made with sorghum. The relatively high leaf concentrations of Ca, Mg, and especially Si in pearl millet may have contributed to its ability to yield well on the acid soil.
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