Conservation Tillage Carbon Balance — Stock-Flow & Phase Plane

The same first-order soil organic carbon (SOC) kinetics as the 3D cropland field — dC/dt = I − k·C — rendered through two genuinely 2D representations of the system's state space instead of a rendered field: a stock-and-flow tank diagram showing carbon literally flowing in and draining out of the SOC pool, and a phase-plane plot of dC/dt against C that makes the stable equilibrium C_eq = I/k visible as the point where the line crosses zero. Tillage intensity steepens the outflow line by raising the decomposition constant k; cover-crop input raises the inflow and therefore the equilibrium the tank is draining or filling toward.