It needs over 4 tons/A based N requirement (assume 50% N available in year 1), but only 1.1 ton/A based on P needs
The program indicates if you could fertilize your crop in one of three ways
1)Use litter to meet the N requirement.  This requires litter at 4.7 tons/ac, but gives you about 200 lb extra P2O5 and 158 lb extra K2O
2) Use 1.1 ton of litter to meet the P2O5 and K2O requirements.  A supplement of 114 lb of N is needed to reach your yield goal of 3 tons/ac.
3) This calculation is based on K2O and is approximately the same as #2