Comparisons were made between banded urea, seed-placed urea, and seed-placed urea treated with the urease inhibitor N-butyl thiophosphoric triamide (UNBPT) at nitrogen applications of 0, 25, 50, 75, and 100 kg N ha“. Seeding equipment used spoon openers and utilized about 25% of the seed-bed area. Yield with seed-placed UNBPT was at least equal to yield from banded urea, and was higher than yield with seed-placed urea at 6 of 8, 5 of 8, and 4 of 14, barley, wheat, and canola sites. Nitrogen from UNBPT could be
applied at least 25 kg N ha-’ higher than could safely be applied using urea in seed-placed applications.