On field after field, Sulf-N® ammonium sulfate fertilizers have proven to be an excellent source of the readily-available sulfate sulfur and ammonium nitrogen crops crave. Unlike elemental sulfur, the sulfate sulfur in Sulf-N® is readily available to crop roots, providing them with access to the essential nutrients they need upon application. The ammonium nitrogen in Sulf-N® is also immediately available for root uptake, and resists nitrogen losses from leaching, volatilization and denitrification.