NutraSoft DG contains pelletized gypsum (calcium sulfate) from natural deposits. It provides your plants with both calcium (21%) and sulfur (16%) upon contact with moisture. This bag contains 40 pounds of material. NutraSoft DG delivers both calcium and sulfate sulfur to your plants. It does so while maintaining a neutral pH. Use it to balance the calcium to magnesium ratio in your soil. NutraSoft also displaces sodium in high-salt soils and minimizes heavy metal toxicity. For new grass, apply before seeding at a rate of 40 to 100 pounds of NutraSoft DG per 1,000 square feet. For established lawns, use 25 to 40 pounds per 1,000 square feet - once in the spring and again in the fall. Please see the links section below for additional application instructions. NutraSoft DG helps loosen compacted soils, increasing water penetration and efficiency. It also decreases the amount of nitrate and phosphate runoff when watering. These processes combine to promote healthy root growth and seed emergence, both of which improve yield!