Journal of Microwave Power and Electromagnetic Energy (JMPEE)
TITLE	Use of Microwave and Lower Frequency RF Energy for Improving Alfalfa Seed Germination [PDF]
AUTHORS	S.O. Nelson 1976 11 3 271-277
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Abstract The use of radiofrequency (RF) electric energy for increasing the germination of alfalfa (lucerne) seed through exposures that lower the percentage of hard seeds (seed coats impermeable to water) is discussed. The influence of various biological and physical factors is considered, and results of experimental findings are reviewed briefly. RF treatments of alfalfa seed at frequencies of 5, 10, 39, and 2,450 MHz effectively reduced hard-seed percentages and provided increases in normal seedling germination when proper exposures were used. Treatments were generally more effective at lower seed moisture contents. Optimum germination response to RF dielectric heating depends mainly upon elevation of seed temperature to proper levels (about 75° C for alfalfa seed of 6% to 7% moisture). Some aspects of practical application of RF methods to seed treatment are discussed.