4.Given the following information estimate the N rate needed for 80 bu/a wheat? Show all calculations.

Previous CropIntended CropSoil data

3000 lb residue/a80 bu/a wheat yield goal1% OM

40% residue C60 lb/bu test wt. 1% OM loss/yr

Residue C:N = 506000 lb/a residue wt.30 lb profile N/a

2.0% N in grain

0.5% N in residue