Fig. 6From: A method for obtaining field wheat freezing injury phenotype based on RGB camera and software controla There were significant differences in vegetation coverage between representative frost resistant and non-frost resistant genotypes. Different letters on the bar graph indicate significant differences, as determined by LSD (P  ≤  0.05). b Biomass repeats (three nitrogen gradients) and boxplots of technical repeats. Corresponding to 128 wheat varieties under 3 nitrogen treatments of two biomass repeats and two technical repeats respectivelyBack to article page