The present study was carried out during the two seasons 2015/2016 and 2016/2017 in Minia governorate to study the effect of silicon, selenium and glutamic acid on the yield of Williams banana CV. and its physical and chemical properties. Four sprays was annually added to Williams banana plants from silicon (250ppm or 500ppm), glutamic acid (50ppm or 100ppm) and selenium (50ppm or 100ppm). The results indicated that all treatments were effective in increasing the yield than the control. Glutamic acid was more effective in this connection than silicon or selenium. The combination of treatments was in most cases more effective than using any of these chemicals solely. Moreover, all treatments with only few treatments improved the fruit quality in the two experimental seasons.