Fig. 5From: Core-labelling technique (CLT): a novel combination of the ingrowth-core method and tracer technique for deep root studyRoot-length density (RLD; cm cm−3), root biomass (RBM; mg cm−3), root diameter (mm) and specific root-length (SRL; g m−1) of alfalfa affected by core-labelling depth measured in the spring (a–d) and autumn experiment (e–h). Small letters indicate significant differences between the treatments (Tukey HSD; P ≤ 0.05). Means and one SE are shownBack to article page