Figure 4
From: Survival of a microbial inoculant in soil after recurrent inoculations
Nitrate accumulation in soil. Nitrate content (µg NO3− g dry soil−1) at weeks 0, 10 and 14 for the four inoculation sequences and Ni control, after low (light colour) and high (bright colour) inoculation density. Letters above indicate significant differences between inoculation density and sequences according to Tukey’s test (p ≤ 10–10 at both week 10 and 14).
