pass mean 0_5cm 5_10cm 10_15cm
0 0.171743 0.0801234 0.165363 0.269741
10 0.328863 0.201355 0.32952 0.455712
25 0.357638 0.33334 0.371562 0.368011
50 0.362736 0.31999 0.378364 0.389855