## 3 Results and Discussion
### Collective Summary and Comparison
#### 3.2.2 The Medium-Organic Soils  
The particle size distribution of medium-organic soils is represented by tests of sample Nos. 3-7. The tests of soil sample No. 3 presented in Figure 14 show some similarity between the results obtained using the hydrometric method and the Analysette 22 laser diffractometer, i.e., the quantitative trend (silt-clay-sand) is maintained, but the measured values themselves are very different and cannot be compared. This is particularly true for the sand fraction, which, in this case, is below 1%, which is a value over 125 times lower compared to the reference method and as much as 731 times lower than the Helos laser diffractometer. The analysis of the test results obtained using the Helos laser diffractometer did not show any similarity with the results obtained using the other methods.  
In the case of sample No. 4, the test results presented in Figure 15 do not show any significant similarities between the methods used, apart from the similar percent  
Figure 14: A summary of the results of sample No. 3.  
Figure 13: A summary of the results of sample No. 2.  
age of silt fraction for the laser methods used (Analysette 22 and Helos). These results cannot be directly compared with the reference method, where the sand fraction was clearly dominant.  
When analyzing the test results of sample No. 5 (Figure 16), it was found that in terms of the percentage of individual fractions, there was a noticeable similarity between the test results obtained using the laser diffractometer only in terms of the dominant silt fraction. In the case of the reference method, the results obtained were different from those obtained using laser methods, and the largest number of grains was assigned to clay in terms of size.  
The research results for sample No. 6 presented in Figure 17 are surprisingly consistent with the test results shown earlier for sample No. 5 (Figure 16), not only in terms of the presented trends, but also in terms of their percentage content. This applies to both the hydrometric and laser test results, which, again, cannot be compared with the reference method.  
Figure 16: A summary of the results of sample No. 5.  
Figure 15: A summary of the results of sample No. 4.  
In the case of the last sample of medium-organic soils (No. 7) presented in Figure 18, the test results confirmed the dominance of the silt fraction for the laser diffraction methods. A reversal of the trend in the size of the fraction observed in the remaining samples was also noticed, as the content of the sand fraction increased significantly at the expense of the clay fraction. The proportions between the fractions also changed in the case of the reference method, where the highest content of the clay fraction was most often observed, which, in this case, turned out to be the lowest, with comparable silt and sand fractions.  
Considering all the examined samples of medium-organic soils, it can be generally concluded that in most cases, certain, occasionally even high, agreement was observed between the test results performed using the laser diffractometer. The results obtained by the hydrometric method were not only incomparable with those obtained by the laser methods, but were basically incomparable among all the samples analyzed.