Framework · Glossary
Yeomans Scale of Permanence
Also: Scale of Permanence, SOP, Yeomans SOP
Definition
A design principle that ranks land-management actions by how difficult and energy-intensive they are to reverse, from most permanent (climate, landform) to least permanent (animal movement). EcoIntel organises recommendations to honour the scale.
Yeomans’ Scale of Permanence is a design principle from P.A. Yeomans’ Keyline Design system, developed in 1950s Australia and now a foundation of regenerative-agriculture and permaculture design.
The scale ranks land-management considerations from most permanent (effectively unchangeable in a human lifetime) to least permanent (changeable in a season). In the classic ordering:
- Climate
- Landform
- Water supply
- Access (roads, tracks)
- Trees and forests
- Structures (buildings, fences)
- Subdivision
- Soil
The principle is: design from the most permanent down. Work out the climate-reading first, then the landform, then the water plan, then access, then trees, then structures, then soil. Reversing higher items is costly or impossible; reversing lower items is cheap.
EcoIntel’s recommendations are organised to honour this scale. Capital-intensive landscape-scale interventions (water-harvesting earthworks, tree planting, access redesign) are framed as strategic investments with long payback timelines. Lower-cost reversible actions (grazing rotation, rest periods, cover-crop adjustments) are framed as quick wins. The report’s section order also echoes the SOP: Context first, then Water, then Living Systems, then Carbon and productivity.
The SOP is the conceptual bridge between EcoIntel’s diagnostic logic and the long lineage of regenerative-design practice. It is the answer to “in what order should I think about all this?”