Phosphorus and Nitrogen Effect on (non-) Inoculated Field Pea Performanace in Carrington, ND.

A two-year study was conducted on a Heimdal loam soil in Carrington, ND to assess field pea response to three types of seed inoculation across N levels at 0, 45, 90 kg/ha (2014) and at 0, 45 kg/ha (2015) across two P levels (0, 75 kg P2O5/ha). Granular, Liquid, and peat-based inoculants were used to treat seeds The trial was set up as a split-split plot in randomized complete block design.
Plant height, biomass at mid-season and harvest, tissue N, nodule weight and nodule counts, and grain yields were measured.
Results showed significant interaction between P rate and inoculant formulation for biomass and root dry weight, and N and P in biomass. N rates significantly affected nodule weight and count.