German farmers expected the Düngeverordnung to cost yield. Two decades of nitrogen data suggest the regulation rewarded regenerative practice instead.

A 0.1% soil carbon gain does not hold 200,000 litres per hectare. The soil-mass arithmetic, the measured figure, and what soil carbon really buffers.

Practice is spreading faster than proof. Sequestration uncertainty bands, reversibility, and why permanence provisions matter more than a single measurement.