Impact of long-term nitrogen fertilization and rotation with soybean on the diversity and phosphorus metabolism of indigenous arbuscular mycorrhizal fungi within the roots of maize (Zea mays L.)

► High N fertilization did not reduce AMF colonization of maize roots in cropped fields. ► Poly-P in maize roots provided evidence that AM fungi provide P to field grown maize. ► AMF diversity in maize roots was high regardless of N rate and varied temporally. ► AMF community varied with N rate indicating specificity to edaphic factors.