Response of “Alamo” switchgrass tissue chemistry and biomass to nitrogen fertilization in West Tennessee, USA

▶ High N fertilization decreased root:shoot ratios in 5-year old switchgrass (Panicum virgatum). ▶ Nitrogen fertilization increased root nitrogen concentrations and decreased root C:N ratios. ▶ There was more carbon and nitrogen stored in belowground biomass than aboveground. ▶ Fertilization impacted tissue chemistry in ways that potentially affect soil carbon storage.