[Cost-Effectiveness] — Potato Fertilizer Efficiency Demonstration

Demonstration household: Mr./Ms. Hao XX Demonstration location: Qicun, Donghai County, Lianyungang City, Jiangsu Province Demonstration crop: Potato Demonstration area: 50 mu Fertilization plan: - Base fertilizer: 12-18-15, 60 kg/mu - High-calcium, potassium, and magnesium fertilizer: 20 kg/mu - Standard white‑granule compound fertilizer: 14-16-15 - Mid‑season topdressing: 16-8-24, 50 kg/mu - Standard white‑granule compound fertilizer: 17-8-21 - Topdressing: Bio‑microbial water‑soluble fertilizer—alternating between 20-20-20 and 13-7-40, applied 4–5 times at 5 kg/mu each time - Calcium‑magnesium nitrate blended with pure potassium fertilizer Yield: 8,000 jin/mu (standard) / 7,500 jin/mu (alternative) User