Field pea acreage in Montana has nearly doubled since 1997 because of its suitability to the climate and soils of the region and changes in the farm program. Usually in rotation with cereals, field pea provides a means to manufacture nitrogen from the atmosphere by nodulation with Rhizobium leguminosarum. This study attempts to determine whether P fertility has an impact on nitrogen production by the pea crop and the amount of N contributed to the following spring wheat crop. Treatments included two tillage systems, no-till and till, two crops (wheat and pea), and four P rates. Phosphorus as monoammonium phosphate was banded in no-till and broadcast in tilled plots at rates of 0, 20, 40, and 80 kg ha-1 in both wheat and pea plots with urea to balance N. Wheat received additional N as urea to total 80 kg ha-1. Initial soil P levels were less than 10 mg kg-1. Pea yield ranged from 1.58 to 3.18 Mg ha-1, linearly increasing with increased P rate. Total N uptake and biomass remaining on the field after harvest of field pea were not significantly different although N in harvested pea was different. Wheat yield did not respond to P fertility. Tillage led to increased wheat grain protein while the high P rates decreased wheat grain protein. First year results suggest that increased P fertility increases pea yield and protein but has a limited effect on N in residue.