The complex charge ordering phenomena for polycrystalline La(1-x)Sr(x)FeO(3) (1/3≤x≤2/3) have been studied by measuring the low temperature magnetization, resistivity and the longitudinal ultrasonic velocity (V(l)). At low doping levels (1/3≤x≤0.5), a dramatic velocity increase is observed below 210 K, and the relative stiffening of V(l) is proportional to the Sr concentration. The analysis suggests that this feature may correspond to the short-range charge ordering state of Fe(3+) and Fe(4+). At high doping levels (0.5
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