Abstract:
Sonic bloom is a technology that combines high frequency sound waves and organic
nutrients, intended for better plant growth to increase itsproductivity.This study aimed to
determine the effect of sound wave frequency and drought stress on stomatal opening, nutrient
uptake efficiency through leaf, and soybean yield. We designed the research as a split plot
experiment.The main plot was sound wave frequency consisting of four levels (no frequency
imposed, frequencies 2, 4and 6 kHz. The sub-plot wasthree soil moisture contents (50,75, and
100% field capacity). We found that the interaction of frequency and soil moisture content
affected the width of stomata at the age of 30, 40 and 50 days after planting (dap), the efficiency
of nitrogen uptake, phosphorusuptake and potassiumuptake and the protein content of seeds.
The width of stomatal opening at a frequency of 4 kHz in soil moisture 100% FC showed the
highest value and was not significantly different from soil moisture 75% FC.There was a positive
correlation between exposure to plants with a frequency of 4 kHz with stomatal opening,
nutrient uptake and increased yield of soybean crops.The use of sonic bloom technology with
plant exposure at a frequency of 4 kHz could increase drought tolerance to 75% soil moisture
content. Soybean seed yield increased by 40.89% and seed protein content increased by 10.3%.
