A study was conducted to determine if potting soils could be pasteurized with a typical 1200 watt microwave oven. Microwave radiation times varied from 0 to 6.0 minutes. Preliminary results indicated that "damping-off" diseases could be prevented in tomato seedlings with the use of potting soils pasteurized by microwaves.
Eichenberger, Rudolph J.
"Microwave Pasteurization of Potting Mixes,"
Journal of the Arkansas Academy of Science: Vol. 45
, Article 9.
Available at: http://scholarworks.uark.edu/jaas/vol45/iss1/9