Biochar application rate regulates soil microbial processes and nutrient dynamics in compost-amended urban agricultural soils
Alfred Melbourne
Urban agriculture soils are commonly amended with compost to improve fertility, yet the functional responses of these systems to biochar additions across application rates remain poorly understood. We conducted a field experiment at Three Sisters Gardens (West Sacramento, CA, USA) to evaluate how biochar applied at 0, 10, 20, and 30 t ha−1 influenced soil physical, chemical, and biological indicators in compost-amended plots under corn and squash production. Late-season soils were analyzed for v