Direct Agricultural Benefits of Biosolids

Many of the advantages of land application of biosolids are realized directly by the farmer.

Rich Source of Nutrients in Organic Forms

Biosolids are naturally rich in nitrogen and phosphorus, and to some extent, potassium. These nutrients are present in organic forms and, as a result, are less water soluble than the nutrients provided by chemical fertilizers. This allows the nutrients to be more available to plants in a slow-release form, often over several growing seasons, and reduces the potential for nutrient loss through surface water run-off. In addition to these macronutrients, biosolids also contain a certain amount of micronutrients such as iron and zinc, among others, which also contribute to healthy plant development.

Improves Soil Structure

The orgainic matter in biosolids binds soil particles together which can reduce soil erosion potential and improve water holding capacity.

Dramatically Improves Crop Yields

Improved soil structure promotes the development of robust root systems and maximizes nutrient uptake by crops. The slow-release of vital nutrients allows the crop to be adequately nourished throughout its development. As a result, crop production after biosolids application is typically significantly improved. In some cases, farmers have reported seeing crop yields doubled after fertilization with biosolids.

Decreased Cost of Fertilization

The use of biosolids decreases a farmer’s dependency on costly chemical fertilizers that must be re-applied each year. The cost of biosolids applications are typically very significantly less than the cost of traditional fertilizer.