b"The hills is where the nitrogen is, so we have to measureThe way that Tenuta discovered what reduces nitrous oxide there. However, over time what we found is that nitrogen canemissions the most is using enhanced efficiency fertilizers actually pool in the furrow, Tenuta explained. We've been higher tech newer fertilizers that have either enzyme surprised in that we can get quite a bit of emissions of N2O eveninhibitors embedded in them or are coated with polymer. in the furrow, even though we did not apply nitrogen there. Stabilized nitrogen inhibitors include urease, nitrification and The second year however, the results were flipped with moredouble. Controlled release include polymer coated urea, aka nitrous oxide being found on the hills and not in the furrows.environmentally smart nitrogen (ESN), and slow release include Nitrogen in the furrow was not providing nutrition to thesulfur-coated urea, methylene urea, isobuylidene diurea, urea crop. So, it's something that we need to tackle with in potatoformaldehyde and urea triazone.production to keep the nitrogen in the hill, he said. With Tenutas study being a decade old now and there being The simplest thing that growers can do to reduce N2Oincreasing pushes from the federal government to reduce emissions is to lower nitrogen rates, Tenuta said. You shouldfertilizer usage, Tenuta plans to start another study in 2023 optimize your nitrogen use by preventing excessive additions,as part of the Canadian Horticultural Council cluster projects use 4R nutrient stewardship and plant new potato varieties whichfunded by the Canadian Agricultural Partnership. take in more nitrogen. SPUDSMART.COM Winter 202335"