pass mean 0_5cm 5_10cm 10_15cm
0 0.308813 0.221872 0.374889 0.329678
2 0.213126 0.134875 0.234583 0.26992
10 0.31361 0.37909 0.2575 0.30424
20 0.38179 0.464694 0.359346 0.321329