Technical Abstract: Coupling winter small grain cover crops (CC) with liquid manure injection may increase manure nutrient capture. The objectives of this research were to quantify manure injection effects using target manure N rates of 112, 224, and 336 kg N ha-1 on CC plant density, fall and spring shoot biomass, N, P, and K uptake and subsequent corn (Zea mays L.) yield. A winter rye (Secale cereale L.)-oat (Avena sativa L.) CC was established prior to fall manure injection. Manure injection lowered mean CC plant density 25% because of CC mortality in the injection zone. Fall CC dry matter (DM) was 26% lower in the manure treatments than the no manure CC control, although no difference was detected for N (9.4 kg ha-1) or P (1.4 kg ha-1) uptake. No difference was detected for spring DM between CC no manure and manure treatments. Shoot DM, N, P, and K uptake increased 29, 41, 31, and 25% from the CC manure 112 to CC manure 224 with no increase above CC manure 224. Cover crop N uptake was higher in CC manure vs. no manure (60.1 vs. 35.6 kg ha-1). Cover crop P and K uptake were also higher in CC manure vs. no manure (9.2 vs. 6.6 kg P ha-1 and 41.3 vs. 30.0 kg K ha-1). Corn grain yield was unaffected by CC and responded positively to manure application (11022 vs. 9845 kg ha-1). Coupling manure injection and cover crops can increase nutrient capture without lowering corn yield.