Theory 45/Terraces/Ratio lens
Spacing Is Slope Against Wall
The claim
Terrace spacing is set by the ratio of slope to wall height, so steeper slopes require closer terraces for the same retaining capacity.
01Mechanism
Each wall must retain the soil above it; the ratio determines the horizontal distance a wall of given height can support.
02Prediction
Spacing should track the ratio.
03Refutation
Spacing tracking slope alone would remove wall height.