I’ve been putting all of my N with the planter for 20 years. Current planter is a 12 row 1770 NT with a 450 gallon tank pulling a 1600 gallon Yetter all wheel steer cart. Dual conceal system puts the fertilizer 3 inches to each side of the seed.  I have been putting down 180 pounds of N for a 250 bushel yield goal after beans.