Extended Data Figure 1: Management intensity (relative to year 2000) and harvest index change over time as used in the model.
From: Agricultural Green Revolution as a driver of increasing atmospheric CO2 seasonal amplitude
The analytical functions are hyperbolic tangent (see text). The parameter values correspond to a management intensity in 1961 that is 10% smaller than in 2010, and a harvest index of 0.31 in 1961 and 0.49 in 2010, based on literature review34.
