1Central Potato Research Station, Jalandhar, 144 003, (Punjab).
2Central Potato Research Station, Patna, 801 506, (Bihar).
3Central Potato Research Institute, Shimla, 171 001, (HP).
Validation study of SUBSTOR POTATO model was done for ten Indian potato cultivars grown under short day conditions in plains of India. For various reasons inherent in the model regarding genetic coefficients responsible for simulation of phenological development and growth, the performance of the model was less than satisfactory. Model requires modification for short day conditions.
