Fig. 4. Time to 50% root emergence and coefficient of velocity of root emergence of Brown Loam (BL), and the acid-soil-resistant Cycles 1 and 2 (BL-ASR₃₃-C1, BL-ASR₁₇-C1, BL-ASR₉-C1, BL-ASR₁₀-C2) and Al-susceptible Cycle 1 (BL-AlS₃₃-C1) white clover populations derived from it, at two levels of soil pH and resistance index, indicating Al resistance, of those characteristics, mean of pH 4.39 and 4.64. Symbols within characters followed by the same letter are not significantly different at the 0.05 probability level. Vertical axis scales have been adjusted so that standard error bars for both characters are approximately equal in size.