Results of the two-factor ANOVAs of the responses of maize grown with soil inoculum collected from high- (NAPI) and low-input (Hopi) maize fields and uncultivated areas
adjacent to the maize fields at Hopi in Experiment 2. Two maize cultivars were used as hosts, a landrace from Hopi, and a hybrid sweet corn. Non-mycorrhizal (−AM) controls
were not included in the analysis of AM root colonization. Mycorrhizal responsiveness was calculated as +AM/−AM where +AM is the total dry weight of mycorrhizal plants
and −AM is the mean total dry weight of the non-mycorrhizal control plants from the same host treatment.