Biosolids Improve Urban Soil Properties and Vegetable Production in Urban Agriculture

Urban Farm DB summary

This field study in Blacksburg, VA, investigated the effects of exceptional quality (EQ) biosolids on urban soil properties and vegetable yield over two years (2016-2018). Biosolids increased soil carbon storage by 37-84% compared to controls, but soil nitrogen availability was lower than expected. Reclamation rates of biosolids resulted in higher yields for cabbage (∼3.1 kg m⁻²) and Siberian kale (∼1.1 kg m⁻²) than inorganic fertilizer (1.0 kg m⁻² and 0.4 kg m⁻² respectively) in fall 2017, indicating potential to increase vegetable yield despite limiting soil conditions.