In the work are presented the results of research on the influence of biostimulation treatment of three agricultural species, namely wheat (Triticum aestivum L.), corn (Zea mays L.) and beans (Phaseolus vulgaris L.). Biostimulation of agricultural species consists of a pretreatment with ozonated water with concentration 1.3 mg /L and deposition on the surface of the seeds of a layer with thickness 0.3 � 0.5 mm composite material consisting of a clay solution with carbon clusters. The study showed that the seeds subjected to treatment have a higher germination energy for all samples compared to the control ones. Also, treatment with composite materials induced an obvious stimulation of growth, which led to increased growth rates of plants, in particular, by 41.17% for wheat, by 18.46% for corn and by 29.5% for beans, compared to control samples, measured 10 days after planting. The application of ozone treatment on seeds increased the growth rate by 16.19% for beans, by 26.08 % for wheat and only by 2.97% for corn.

In this work, research findings on processing bean seeds with sound waves in the range 0-9 kHz are presented. The process of germination has been examined for seeds soaked in heat treated water and plain water. In the initial stage, the conditions necessary to stimulate plant growth were created. The paper describes the experimental setup and the sound wave seed treatment procedure. The characteristics of the seed germination process were determined and compared with those of the control sample germination.