Potential yield can be measured using
1. Crop growth simulation models (e.g., ORYZA2000)
Using these models requires site-specific data and rigorous validation, and is still to be refined for Southeast Asia.
2. Experiment yields
Using experiment yields to measure potential yield requires well-managed field studies in which yield-limiting and yield-reducing factors are eliminated.
3. Best farmers’ yields—upper 10 percentile per season + year
The challenge in using best farmers’ yields to measure potential yield is that it is difficult to know if all abiotic and biotic stresses were avoided.