Show Seeds Stimulated by Rays Seeds that refuse to sprout when planted can be roused from dormancy dor-mancy by soaking and then exposing expos-ing them to the proper colored light for a short time. Only the longer wavelengths of light have this stimulating stim-ulating power. Dr. L. H. Flint of the United States Department of Agriculture has found. Seeds exposed ex-posed to light at the blue-violet end of the spectrum refused to germinate. germi-nate. Even seeds that had been given the stimulating treatment with the longer wavelengths at the red end of the spectrum and then were exposed to blue or green light would not sprout. The treated seeds need not be germinated Immediately. Im-mediately. They can be dried out and planted later. Popular Mechanics Me-chanics Magazine. |