34.0% ammonium sulfate. AMS-Supreme is a unique micro-homogenized, easy-to-use conditioning blend of AMS, defoaming agents, and deposition aid polymers for use with translocating herbicide performance. Benefits include: enhancement of herbicide activity by conditioning antagonistic calcium ions present in spray solutions and providing ammonium ions to enhance herbicides. Contains 3.4 pounds of ammonium sulfate per gallon. Contains anti-foam /defoamer and deposition polymers to mitigate drift.