AVP1002 Features: * Gypsum * 64pct Calcium Sulfate, 22pct Calcium, 12pct Sulfur * Adds essential calcium and sulfur to soil * Helps leach out harmful salts, improves soil structure, and breaks up clay soil * Easy to use pearled soil amendment * 25 lbs bag Specifications: * 25 lbs per 1,000 square feet