Microwave power level (W/g) Air temperature (ºC) Drying time (h)
Air velocity 1.0 m/s Air velocity 1.5 m/s
0 40 9.5 8.5
0 50 8.3 7.5
0 60 8.0 7.0
2 40 1.250 1.343
2 50 1.116 1.250
2 60 1.081 1.166
4 40 1.083 1.166
4 50 1.00 1.082
4 60 0.916 1.00
6 40 0.917 1.00
6 50 0.835 0.917
6 60 0.750 0.833
Table 1: Drying time for convective and convective – microwave drying conditions of Ashwagandha roots