Ammonia volatilization from fertilizer sources on a loam soil in Idaho

Optimizing crop N uptake while minimizing NH3 volatilization from fertilizer sources is a critical part of agricultural best management practices. Urea the most widely used but also one susceptible to losses as NH3. Fertilizer and additives can be reduce volatilization. Specifically, urease inhibitors [e.g., N-(n-butyl) thiophosphoric triamide (NBPT)] urea. A novel fused ammonium sulfate nitrate (ASN) product has recently been developed another potential alternative source not studied widely. field study was performed quantify newly available ASN compared with various fertilizers (ammonium [AS] urea) including urea treated inhibitor NBPT in an alkaline calcareous loam soil Idaho. Further, we assessed surface applied incorporated these sources. Untreated surface-applied volatilized highest amount NH3, whereas incorporation effective reducing untreated Our indicated that (AS, ASN, urea+NBPT) were equally when will help refine under multiple situations traditional practices producers western United States. site-years locations would needed provide evidence effectiveness wider range environmental conditions.