The document discusses the use of nitrogen stabilizers and inhibitors to reduce nitrogen losses from fertilizer by up to 25% and produce a darker green color in turf. Specifically, it finds that Nutrisphere-N and NZone did not effectively reduce urea hydrolysis, ammonia volatilization, or nitrification. However, it supports the use of established additives like NBPT, nitrapyrin, and DCD to inhibit nitrogen losses when applied before or mixed with granular or liquid fertilizers. The additives are available in formulated products or liquid options to flexibly spray on turf along with nitrogen fertilizers.