Over the past decade, advances in sensing devices and computer systems have allowed for the proliferation of high-throughput plant phenotyping systems (Das Choudhury et al., 2019). These systems are designed to acquire and analyze a large number of plant traits (Han et al., 2014; Krieger, 2014), including the measure of small structures, such as the venation network of leaves (Endler, 1998; Green et al., 2014). However, the characterization of plant roots is more challenging because they are "hidden" in the soil (Atkinson et al., 2019), which limits the type of sensors and techniques that can be applied. A number of types of methods have previously been used to analyze root traits. Non-imaging-based in situ methods estimate
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