Science

“For an AFP share of 20%, fertilizer requirements vary from 1.0-14 times that of a vegan diet as IFE increases from 2.5 to 250 with faw-crop=0.70, from 1.1-29 times that of a vegan diet for faw-crop=0.35. Thus, shifting from animal to plant sources of protein can substantially reduce fertilizer requirements, even with maximal use of animal manure. This paper adds a new and important dimension to the ongoing efforts, motivated by climate and health concerns, to transition more fully to plant-based diets.”