Using a urease inhibitor, N-butyl thiophosphoric triamide (NBPT) for seed-placing nitrogen with wheat, barley, and canola
Date
1996-02-22
Authors
Pauly, D.G.
Nutting, M.D.
Dowbenko, R.E.
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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.
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Soils and Crops Workshop