Why are biosolids considered beneficial?
Biosolids are rich in nutrients and organic matter so are a good natural fertiliser as well as being a soil amendment to enhance the land. The nutrients including nitrogen and phosphorus (two elements essential for crop growth) and micronutrients such as copper, zinc and iron release slowly during plant growth. Among their benefits, biosolids can: • Improve crop production Land application of biosolids that meet strict quality criteria help improve, replenish and maintain healthy soil by adding important nutrients, boosting soil water-holding capacity and reducing topsoil runoff, all of which serve to increase crop yields. The largest component of biosolids is organic matter. It works as a soil conditioner to promote necessary bacterial activity, loosening clay and improving the consistency of sandy soils. The improved texture of these treated soils promotes dense, healthy root growth, allowing better nutrient uptake by plants. • Reduce soil erosion and protect water quality Land appli