Fig. 2. Cumulative crop nitrogen offtake as affected by forage crop and fertility treatment. The term CONT is control; NREC and NHIGH are inorganic N fertilizer at recommended and high rates, respectively; DM is dairy manure; and DMC, SSLC, and CSC are compost produced from dairy manure, sewage sludge, and corn silage, respectively. Units in treatment title refer to annual application rates in kg total N ha^–1 yr^–1. Within each crop, columns with different letters are significantly different at the 0.05 probability level.