1. FAOSTAT Production Indices (Food and Agriculture Organization of the United Nations, 2023); https://www.fao.org/faostat/en/#data/QI
2. Alexander, P. et al. Glob. Environ. Change 35, 138–147 (2015).
3. Brownlie, W., Sutton, M. A., Heal, K. V., Reay, D. S. & Spears, B. M. (eds) Our Phosphorus Future (UK Centre for Ecology & Hydrology, 2022); https://doi.org/10.13140/RG.2.2.17834.08645
4. Phosphate Rock. Mineral Commodity Summaries: Phosphate Rock (U.S. Geological Survey, 2023); https://go.nature.com/423hkag
5. Commodity Insights: Sulphur Fertilizer Market and Price Analysis (S&P Global, 2022); https://go.nature.com/3IBzyJ0