Theory 29/Grassland & Savanna/Productivity
Productivity Is Season Against Grazing
The claim
Grassland productivity is set by the ratio of growing season length to grazing pressure rather than by rainfall.
01Mechanism
Growth accumulates over the season while grazing removes it; the ratio determines standing biomass at the end.
02Prediction
Biomass should track the ratio.
03Refutation
Biomass tracking rainfall would remove grazing.