PUE scenarios P fertilizer to total inputs ratio P fertilizer to total inputs ratio P fertilizer to total inputs ratio
A) Least sustainable B) Normal C) Most sustainable
1) Business-As-Usual (BAU) 1A 2050 PUE at current level; P fertilizer to total inputs (fertilizer + manure) ratio = 100%, and total inputs = projected P inputs 1B 2050 PUE at current level; P fertilizer to total inputs (fertilizer + manure) ratio = current level, and total inputs = projected P inputs 1C 2050 PUE at current level; P fertilizer to total inputs (fertilizer + manure) ratio = current level, and total inputs = projected P inputs - P residual accumulated since 1961
2) Moderate-Policy-Ambition (MPA) 2A 2050 PUE linearly improved to median level; P fertilizer to total inputs (fertilizer + manure) ratio = 100%, and total inputs = projected P inputs 2B 2050 PUE linearly improved to median level; P fertilizer to total inputs (fertilizer + manure) ratio = current level, and total inputs = projected P inputs 2C 2050 PUE linearly improved to median level; P fertilizer to total inputs (fertilizer + manure) ratio = current level, and total inputs = projected P inputs - P residual accumulated since 1961
3) High-Policy-Ambition (HPA) 3A 2050 PUE linearly improved to 75th percentile level; P fertilizer to total inputs (fertilizer + manure) ratio = 100%, and total inputs = projected P inputs 3B 2050 PUE linearly improved to 75th percentile level; P fertilizer to total inputs (fertilizer + manure) ratio = current level, and total inputs = projected P inputs 3C 2050 PUE linearly improved to 75th percentile level; P fertilizer to total inputs (fertilizer + manure) ratio = current level, and total inputs = projected P inputs - P residual accumulated since 1961