Last week we reviewed an overlooked measure: agricultural productive capital. Using some Bureau of Economic Analysis (BEA) data, we developed an index of gross capital investment, which showed a major investment surge in agricultural equipment purchases in 2012–2014. Farm investments peaked in 2014 at a remarkable $34.38 billion, based on a series of factors that included high commodity prices, expansive export markets, relatively low interest rates, and rising demand for biofuels. The BEA data also showed how the investment cycle turned sharply downward thereafter, with the index of real gross investment falling from 138 in 2014 to 76.8 in 2018. Since then, agricultural productive capital has risen but at a lower rate than investment...