## 3 Results and Discussion  
Table 2 presents the test results for 7 randomly selected RS11003 nozzles and the TP11003-SS reference nozzle, determined on the basis of measurements of the transverse distribution of liquid volume on a standardized grooved table, along with the results of measured unit flow rates. A graphic interpretation of the transverse distribution of the liquid collected in grooves equal to 25 mm in width for the tested specimens is presented in the chart below (Figure 4). For each sample tested, the values of the CV coefficient determined for a single nozzle, the spraying boom, and nozzle assembly are presented. The results are ordered by measurement order. The determined values of the CV coefficient for individual nozzles fulfill a comparative role, while those determined for the spraying boom become a direct assessment of the spraying quality. Figure 3: Diagram of the stream with marked 2D-PDA measurement points. Note: h\({}_{z}\), measuring distance from the nozzle; \(\Delta\)x, measuring step. The analysis of the results (Table 2) indicates that when submitting identical nozzle samples for the spraying boom, the obtained were CV values below the maximum permissible value of 10%. The unit flow rate for the tested samples was within \(\pm 5\%\) of the nominal flow rate. It can be concluded that in light of the presented work quality assessments, the tested nozzles meet the criteria, which are additionally supplemented by the manufacturer's information on the optimal fraction of produced droplets. It was noted that despite positive assessments, there are large differences in the distribution of the plant protection product. Observations of a similar nature were observed in studies conducted by other authors [29]. The analysis of the transverse volume distribution, measured on a grooved table (Figure 4), shows a clear change in the nature of the volume distribution for individual spray  
\begin{table}
\begin{tabular}{c c c c c c c c c c} \hline  & & & & & & & & & & \\  & & **No. 1** & **No. 2** & **No. 3** & **No. 4** & **No. 5** & **No. 6** & **No. 7** & **References. ** \\ \hline CV nozzle/boom (\%) & 56.7/5.8 & 48.7/8.8 & 56.9/6.7 & 55.6/6 & 56.6/6.8 & 58/6.3 & 56.3/6.3 & 51.7/4.6 \\ flow rate (L/min) & 1.16 & 1.18 & 1.15 & 1.16 & 1.17 & 1.18 & 1.18 & 1.18 \\ x (mm)/ groove & \multicolumn{8}{c}{**volume (mL)**} \\ \hline  
assessments. It is natural for this type of nozzle to achieve a decreasing liquid volume distribution as it moves away from the nozzle axis (Figure 4, Teejet TP11003-SS reference nozzle). A significant and unforeseen increase in volume for the RS11003 nozzles subjected to the test was observed at measuring positions 20 to 22 (462.5-512.5 mm; Figure 4) for the right side of the stream. For nozzle number 2, an increase in volume was also noted in the left part of the stream at measuring positions 18 to 20. For basic research in the field of spray spectrum evaluation in selected bands (measuring ranges  
Based on the analysis of the test results, Dv0.5 (VMD) variability was found in the range of 241-262 \(\upmu\)m as it moved away from the nozzle axis. Such a small change in volume median diameter (VMD) was observed up to scanning position x = 337.5 mm for the left and right parts of the tested stream (Table 3, Figures 6 and 7).