The largest increases in P accumulation in biomass were in RS (Figure 4c). This may have been caused by concentration as a function of higher P contents, since biomass yield did not follow these same trends. In addition, there appears to be a close relationship between AMF inoculation, biomass yield and P accumulation, especially in locations with less P availability in the soil, as there was a higher P accumulation in the five areas tested when little P was available in the soil (Figure 4).