Long-term exposure of young spruce and beech trees to 2450-MHz microwave radiation

Young spruce and beech trees were planted in field plots and exposed to 2450-MHz microwave radiation generated by a 600-W magnetron source. Power flux densities (PFD) ranged from 0.007 to 300 W/m2, depending on the location within the plots. Microwave exposure was permanent during 3.5 years. Heating effects of the microwave radiation were estimated by measuring the hydrolysis rate of exposed sucrose solutions. This method revealed a temperature...