Figure 4.

Effect of sand particle size, nutrient strength and phosphorus omission on shoot weight (A) and root weight (B) of maize plant grown with R. irregularis inoculum in sand substrate-based culture. Data are means ± SE (n = 6). Bars without shared uppercase and lowercase letters indicate significant difference of shoot weight and root weight among different particle size of sand according to Tukey’s HSD test at p < 0.05. Bars with asterisks represent significant difference of shoot weight and root weight between phosphorus omission (−P) and phosphorus not omission (+P) treatments. Asterisks within column indicate significant difference of shoot weight and root weight between half strength and full strength nutrient treatments. * p < 0.05, ** p < 0.01, *** p < 0.001.