White Irghorn hybrid chickens of difterent day old, to microwave t_reatment at the low ages were-subjected to CW microwave radiaor-high densities showed significantly^ high. jr ti6ns at a fre{uency of 6 GHz and at densipercent hen-day rate of lay. during -169 to 476 ties of 0.02 ana +bO picowatts/cm'. Microdays of age, and significa_ntly lower.egg waves were produced by a Varian LD 807 weight than the untreated birds. The lowtravelling wa-ve tube. Continuous or periodic deniity treatment

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... d _ in significantly exposure-of chickens during the growiig stage highei fertility than the,-high level of-treatdid not afiect their growth-or fedd coniersidn m6nt. Egg quitity, mortality ald-seve_ral other efficiency in comparison with non-treated contraits studied were unaftected by the treattrols. Hens subjected continuously, from I ments.