1. Appearance: Black granular 2. Content: Humic Acid 45-60%; OM 55-70% 3. Hardness: 1.2kgmin 4. Size ... hydroxyl, carboxylic, phenolic hydroxyl, active groups. Usage1) Agriculture : organic fertilizer, raw material for humates based fertilizers and also can be ... used as soil ameliorator, plant growth stimulator and fertilizer improver. 2) Industry: Used as oil drilling fluid stabilizer, ...