What is the purpose of using biosolids in agriculture?

The purpose of using biosolids in agriculture primarily revolves around recycling nutrients and improving soil health. Biosolids are organic materials produced from the treatment of sewage sludge, and they contain essential nutrients like nitrogen, phosphorus, and potassium, which are vital for plant growth. When applied to agricultural land, biosolids help replenish the soil's nutrient content and enhance its structure, promoting more effective water retention and aeration.

In addition to fertilizing crops, the organic matter in biosolids also fosters beneficial microbial activity in the soil, which can further enhance soil fertility and health. This practice contributes to sustainable farming by closing the nutrient loop—returning nutrients back to the land instead of discarding them, thus supporting both agricultural productivity and environmental conservation.

While reducing water usage in farming and providing habitats for beneficial insects are valuable practices in agriculture, they are not the primary benefits of applying biosolids. Similarly, replacing chemical fertilizers entirely may not be feasible or desirable, as many farmers use a combination of organic and synthetic fertilizers to achieve optimal crop yields.