Data and code for: Nitrogen surplus, potassium shortfall: the hidden imbalance beneath the world's food supply

Derived data and Python code supporting the article "Nitrogen surplus, potassium shortfall: the hidden imbalance beneath the world's food supply" (M.G. Asghar; manuscript under review). The package regenerates every figure, table and statistic in the article from open data: FAOSTAT domains ESB (Cropland Nutrient Budget), RFN (Fertilizers by Nutrient), RL (Land Use), QCL (Crops and Livestock Products) and OA (Annual Population), read from the public open-numbers mirror at commit ba0efde, and Natural Earth 1:50m country boundaries. Contents: README.md (sources, software versions and run order); code/ (16 Python scripts); Supplementary_data.xlsx (21 sheets of country-level and derived data, named after the article's figures and tables). Version 2.0 adds the analysis of cereal production and population by nutrient-imbalance class, adds the screened 2021–2022 fertilizer-shock analysis to the code, and renumbers all outputs to match the article.