Chapter-26: Is Climate-Smart Agriculture Coherent in High-Input Systems? A Three-Pillar Audit of United States Corn Production, 2000 to 2023

The climate-smart agriculture (CSA) framework articulated by the Food and Agriculture Organization rests on three pillars: sustainable increases in productivity, improved resilience to climate variability, and reductions in greenhouse gas emissions per unit of output. While CSA has been applied extensively to smallholder systems in the Global South, its application to high-input industrial cropping systems remains theoretically underdeveloped. This paper asks whether the contemporary United States Corn Belt production system, which serves as a global benchmark for cereal productivity, satisfies the CSA framework on its own stated terms. Using a structured framework analysis that synthesizes published empirical findings from agronomic field experiments, econometric productivity studies, and biogeochemical meta-analyses, the paper evaluates United States corn production against each CSA pillar, with particular attention to the role of nitrogen fertilizer as the master input of the industrial corn system. Evidence drawn from the peer-reviewed literature reveals an asymmetric pattern across pillars: strong satisfaction of the productivity pillar, ambiguous or weakening performance on the resilience pillar, and clear failure on the mitigation pillar. The paper argues that applying the climate-smart label to high-input commodity grain production represents a category error and discusses implications for United States climate and agricultural policy.