Data from: Temporal and spatial variation in switchgrass biomass composition and theoretical ethanol yield

Information on temporal and spatial variation in switchgrass (<i>Panicum virgatum</i> L.) biomass composition as it affects ethanol yield (L Mg^–1) at a biorefinery and ethanol production (L ha^–1) at the field-scale. Switchgrass biomass samples were collected from a regional, on-farm trial and biomass composition was determined using developed near-infrared reflectance spectroscopy (NIRS) prediction equations and theoretical ethanol yield (100% conversion efficiency). Data comprises of forage quality components and cell wall composition parameters specific to the bioenergy sector. Switchgrass was harvested during the reproductive growth stage.