## 3 Results and Discussion
\begin{table}
\begin{tabular}{r r r r r r r r r r r} \hline \hline \multicolumn{1}{c}{\multirow{2}{*}{**x**}} & \multicolumn{1}{c}{**Counts**} & \multicolumn{1}{c}{**D10**} & \multicolumn{1}{c}{**D20**} & \multicolumn{1}{c}{**D30**} & \multicolumn{1}{c}{**D32**} & \multicolumn{1}{c}{**Dv0.1**} & \multicolumn{1}{c}{**Dv0.5**} & \multicolumn{1}{c}{**Dv0.9**} & \multicolumn{1}{c}{**Dv0.98**} & \multicolumn{1}{c}{**RSF**} & \multicolumn{1}{c}{**V100**} \\  & \multicolumn{1}{c}{**(mm)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} & \multicolumn{1}{c}{**(\(\upmu\)m)**} \\ \hline  
Figure 6: Cumulative percentage volumes for the left side of nozzle number 2. Figure 7: Cumulative percentage volumes for the right side of nozzle number 2. Past research [30] has shown that VMD grows in the stream as it moves away from the axis, which is natural for flat fan agricultural nozzles. It was also found that despite a decrease in the number of measured droplets in subsequent samples as they move away from the spray stream axis, the measurement accuracy was reduced, however the obtained volume median diameter (VMD) value was reliable. Above x = 337.5 mm, an increase of Dv0.5 by 20-40 \(\upmu\)m on average was noted at subsequent measuring points, which is natural for these types of nozzles. The number of discrete measurement points was adjusted to obtain a maximum deviation of Dv0.5 between subsequent measurements of \(\pm\) 10% (ISO/FDIS 25358-2018). An increase in the value of the diameter of the droplet spectrum and a decreasing number of occurrences in this area of the stream results in the correct distribution of liquid volume, which was also noted in studies that assessed the transverse distribution of liquid volume. A significant increase in the value of VMD was found in measuring positions 20 to 22 (462.5-512.5 mm; Figure 7). On the right side, streams averaged 170 \(\upmu\)m, while a slightly lower value of 95 \(\upmu\)m on average was noted in the same positions for the left. A significant decrease in the value of the relative span factor (RSF) was also noted in these measuring positions, which clearly indicates a decrease in the uniformity of the droplet size distribution. A decrease in the value (V100) from a level of about 5% in the area of the nozzle axis to values of 0.1%-0.2% at these measuring points indicates the occurrence of droplet spectra with diameters greater than 100 \(\upmu\)m.  
Although a drop in the number of droplet occurrences was noted in these areas (Figure 8), such a significant increase in diameter in the spraying spectra characterized by diameters Dv0.1, Dv0.5, and Dv0.9 resulted in disruption of the liquid volume distribution in these spray bands (Figure 9). This state was confirmed by the results obtained in the assessment of the volume distribution, which was determined for the nozzle on a multigrooved table, as well as by the results of the volume distribution determined on the basis of average volume diameter D30 and the number of drops at subsequent measuring points (Figure 10). Figure 8: The number of occurrences of drops in the diameter class for nozzle number 2, right side of the stream, measuring positions 18 to 22. According to the ASABE S572.1 reference, the diameter of the volume median diameter (Dv0.5 = 280.5 \(\upmu\)m) was obtained for the spray stream, which standardizes the nozzle to the medium droplet class (236-340 \(\upmu\)m). A decrease in the volume median diameter value was observed to the level of Dv0.5 = 266.5 \(\upmu\)m for the stream in which measuring areas were omitted, in which the disturbance of the liquid volume distribution was noted.