ROCK DUST LOCAL'S HOUSE BLEND OF PREMIUM ROCK DUST AND HORTICULTURAL GRADE CHARCOAL (BIOCHAR). A Soil Conditioner and Livestock Bedding Admixture Targeting Phosphorus and Nitrogen Management. Add to compost at up to 15% by volume. Add to potting soil blend at 5% by volume. As a livestock bedding admixture use at 5-10% by volume. As a soil conditioner at 1-2 lbs./ 100 square feet, incorporate or mulch over; each .5 cu ft. package covers +/- 1000 sq. ft. when used @ 2 lbs./ 100 sq. ft. Conforms to USDA/NOP protocols for Organic production.