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Layout of soybean plants grown in a semi-hydroponic phenotyping platform at 19 days after sowing (DAS) (a), and example images of root systems of eight selected genotypes at 39 DAS (b). Root angle (RA), root width (RW) and maximal root depth (MRD) of the soybean root system grown in a semi-hydroponic phenotyping platform (c), were measured at 39 DAS. White bar = 10 cm.
