Soil‐test biological activity with the flush of CO ₂ : VI. Economics of optimized nitrogen inputs for corn

Standard N fertilizer rates for corn ( Zea mays L.) production are often based on yield goal and a simplified N factor. Unfortunately, simplified systems generally ignore management history that affects soil health condition. We analyzed economic return to N fertilizer investment using a soil‐test biological activity (STBA)‐based approach compared with current approaches in the United States, and specifically in North Carolina (NC) and Virginia...