Humic carbon is important for chemical composition and biological productivity, including crop fertility and nutrient retention capacity. As soil carbon stocks increase, carbon is sequestered and the risk of loss of other nutrients through erosion and leaching is reduced. By providing a food source for micro-organisms, organic carbon can help improve soil stability by binding soil particles together into aggregates or ‘pads’. Bacterial exudates, root exudates, fungal hyphae, and plant roots can all contribute to good soil structure. Quantity : 2.5 to 5 kg per acre. Packing : 2.5 Km, 5 Km