# Aggregate and Particle Size Distribution of the Soil Sediment
## 3 Results
### Influence of Initial Condition and Slopes of the Experimental Plots  
Tables 3-5 show statistical analysis of particle size distribution curves for each slope separately. Graphical representation of these tables is shown in Appendix A in Figure A1. A table representing average statistical analysis of all three slopes is shown in Appendix A (Table A4). The SD of the particle size distribution curves before destroying aggregates was generally higher--the highest for the particles with aggregates smaller than 50 \(\upmu\)m (SD of the particles smaller than 50 \(\upmu\)m from the slope of 22\({}^{\circ}\)--5.8, 9.3, 6.8, and 6.9 for samples D1, W1, D2, and W2, respectively) compared to the curves without aggregates. For the samples with aggregates from all three slopes, samples D1 and D2 had more particles smaller than 2 \(\upmu\)m compared to the samples W1 and W2. The representation of the particles smaller than 10 \(\upmu\)m had the same trend. At slopes of 22\({}^{\circ}\) and 30\({}^{\circ}\), the representation of particles smaller than 50 \(\upmu\)m for samples with aggregates became higher with later sampling time, with the exception of the samples eroded last, W2. For the samples without aggregates from the slopes of 22\({}^{\circ}\) and 30\({}^{\circ}\), samples D1 and D2 had more particles smaller than 2 \(\upmu\)m compared to the samples W1 and W2; representation of the particles smaller than 10 \(\upmu\)m had also the same trend. For the samples without aggregates eroded from the 34\({}^{\circ}\) slope, the representation of the particles smaller than 2 and 10 \(\upmu\)m became lower with later sampling time. For the slopes of 30\({}^{\circ}\) and 34\({}^{\circ}\), samples D1 and D2 without aggregates had more particles smaller than 50 \(\upmu\)m compared to the samples W1 and W2. The influence of the slope of the soil container on the aggregate representation percentage in the soil sediment was examined. Graphical representation of statistical analysis of PSD of samples collected from each slope is shown in Appendix A in Figure A2. Tables 3-5, the tables representing difference of the median values with and without aggregates for \begin{table}
\begin{tabular}{c c c c c c c c c c} \hline  & & \multicolumn{4}{c}{**With Aggregates**} & \multicolumn{4}{c}{**Without Aggregates**} \\  & & **D1** & **W1** & **D2** & **W2** & **D1** & **W1** & **D2** & **W2** \\ \hline \multirow{3}{*}{Median \(\pm\) SD} & \textless{2} \(\upmu\)m & 4.0 \(\pm\) 1.8 & 3.5 \(\pm\) 0.9 & 5.5 \(\pm\) 1.9 & 3.9 \(\pm\) 1.7 & 22.8 \(\pm\) 4.2 & 17.5 \(\pm\) 6.6 & 19.0 \(\pm\) 3.7 & 16.9 \(\pm\) 4.0 \\ \cline{2-10}  & \textless{10} \(\upmu\)m & 20.3 \(\pm\) 2.3 & 19.5 \(\pm\) 3.0 & 22.4 \(\pm\) 4.7 & 20.0 \(\pm\) 3.6 & 54.2 \(\pm\) 3.0 & 48.6 \(\pm\) 4.7 & 49.7 \(\pm\) 2.2 & 48.2 \(\pm\) 2.6 \\ \cline{2-10}  & \textless{50} \(\upmu\)m & 46.9 \(\pm\) 4.6 & 47.5 \(\pm\) 6.9 & 47.5 \(\pm\) 6.7 & 49.0 \(\pm\) 4.5 & 92.4 \(\pm\) 1.2 & 90.6 \(\pm\) 1.5 & 91.2 \(\pm\) 0.9 & 90.9 \(\pm\) 2.1 \\ \hline \end{tabular}
\end{table} 
Table 4: Statistical analysis (median and standard deviation) of influence of initial conditions to the particle size distribution (obtained by LD) for the samples from the plot with slope 30\({}^{\circ}\) [%].