Fig. 4From: Nano-zinc and plant growth-promoting bacteria is a sustainable alternative for improving productivity and agronomic biofortification of common beanGrain zinc (Zn) concentration in 2019 (A) and 2020 (B), shoot Zn uptake in 2019 (C), grain Zn uptake in 2019 (D) and 2020 (E) common bean cropping seasons as a function of foliar nano-Zn application and co-inoculations of plant growth-promoting bacteria. The upper case letters are used for the interactions of PGPBs inoculations within each dose of foliar nano-Zn application, whereas lower case letters are used for the interaction of foliar nano-Zn doses within each inoculation treatment. The identical alphabetic letters are statistically similar with each other as analyzed by Tukey test for foliar Zn doses (p < 0.05) and Scott–Knott test for PGPBs inoculations (p < 0.05) in 2019 and 2020, respectively. Error bars indicate standard error of the means (n = 4 replicates)Back to article page