Short food supply chains and circularity are discussed as key factors for a sustainable food
system. Although self-sufficiency ratios (SSR) are often used to characterize agri-food
systems, the concept of SSR remains inconsistently defined, particularly when means of
production such as livestock feed are explicitly considered. We present a systematic
conceptualization of SSR, ie, the ratio of domestic production to consumption within a region
along three dimensions: a) livestock products, b) cropland products, and c) primary …