Application method and ammonia emissions in nitrification inhibitors treatments

The use of NI with liquid fertiliser or animal urine or their fertiliser placement in subsurface soil (i.e., 2 cm and 5 cm depth) either reduced or had little effect on NH₃ emission (e.g., Rodgers 1983; Prakasa Rao and Puttanna 1987). As the liquid N input and NI moves quickly into the subsurface soil, NH₄⁺ is sorbed onto the exchange sites and has less chance for NH₃ emission (Di and Cameron 2004). These results suggest that increase in NH₃ emission by NI can be mitigated by managing the application method, including liquid type or sub-surface placement.