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Stacked vertical barplot showing genotypic variation in root length of 171 soybean genotypes grown in a semi-hydroponic phenotyping platform 39 days after sowing. Median values were plotted for all genotypes. Both RL-upper (root length in 0–20 cm soil layer) and RL-lower (root length below 20 cm soil depth) are presented (ordered from shortest to longest average total root length).
