Ammonium Sulfate 21-0-0 Fertilizer"Greenway Biotech Brand" 50 Pounds 50 Pounds of Greenway Biotech Ammonium Sulfate Fertilizer 21-0-0 Contains 21% Water Soluble Nitrogen and 24% Sulfur Excellent Source of Water Soluble Nitrogen Fertilizer Great and Affordable Fertilizer for Your Lawn Due to 24% of sulfur is Very suitable for Acid Loving Plants and to Lower pH Levels in Alkaline Soil