Check the listing for details. 16-3-16 Soluble High Nitrate Fertilizer - 25 Lbs.. Condition: New. Listed at 69.95 USD. Southern Ag 16-3-16 Soluble FertilizerSouthern Ag 16-3-16 is a high nitrate soluble fertilizer for use on ornamentals, shrubs, trees, lawns, house plants, tobacco, and vegetables. It provides essential nutrients for larger plants and more blooms, fruits and vegetables. Contains calcium and magnesium. Usage:Spray: 5 lbs. per 100 gallons.Drench: 2 lbs. per 100 gallons.Constant feed: 50-200 ppm.Turf: 1 lb. in 10 gallons per 1,000 sq. ft.Application: Spray: thoroughly every 7 - 10 days. Drench: 100 gallons per 400 sq. ft. Active Ingredients:Nitrogen - 16% (Ammoniacal Nitrogen - 3.36%; Nitrate Nitrogen -12.64%)Calcium - 4%Phosphate - 3%Potash - 16%Chlorine - not more than 1%Boron as B - 0.02%Copper as Cu (Chelated) - 0.015%Iron as Fe (Chelated) - 0.125%Manganese as Mn (Chelated) - 0.04%Molybdenum as Mo - 0.0008%Zinc as Zn (Chelated) - 0.015%Magnesium as Mg - 2%