Air temperature changed between 20oC and 27.4oC during open sun drying while temperature of air at the inlet of solar-assisted spouted bed dryer varied between 35.3oC and 65.5oC during the experiments. Effective diffusivities were found to be 0.64 × 10−10 and 3.27 × 10−10 m2/s for open sun and solar-assisted spouted bed drying of pea, respectively.