Annually harvested lignocellulosic biomass crop residues require novel storage technologies to optimize industrial use.  Solid state fermentation of biomass feedstock may provide organic chemicals and fibers while reducing the risk of dry-storage procedures.  Corn (Zea mays L.) grain has been used widely to produce ethanol, but little is known regarding appropriate ensilage strategies for stover with high dry matter content.  We tested the effects of D-glucose at 0, 10, 20, 30, and 40 g kg^-1 dry matter (DM) and N (KNO₃) at 0, 5, 10, 15, and 20 g kg^-1 DM in a factorial arrangement on chemical composition and fermentation in corn stover following 1, 7, and 21 days of storage.  Ensilage of 7 days resulted in a pH of 5.2 but a further decline to pH 4.9 at day 21 was not significant.  Lactate rose from 7 g kg^-1 at day 1 to 12.8 g kg^-1 at day 21 but effects of sugar or N levels were inconsistent.  Acetate was similar at day 1 and 7 (average of 5.2 g kg^-1), but increased towards day 21 (6.2 g kg^-1).  Higher sugar levels generally decreased acetate concentrations.  Propionate, butyrate, and isobutyrate averaged during the experiment 0.4 g kg^-1, 0.6 g kg^-1, and 0.7 g kg^-1, respectively.  Neutral detergent fiber increased from 780 g kg^-1 at day 1 to 799 g kg^-1 at day 2 and decreased to 770 g kg^-1 at day 21, but no effects of substrate levels were found during the period of ensiling.  Effects of either sugar or N were also absent in acid detergent fiber, but average concentrations decreased from 480 g kg^-1 at day 7 to 450 g kg^-1 at day 21.  Our results suggested that sugar addition may aid in reducing pH and enhancing preservation but interaction with others substrates warrant further research.