condition mean min max 12pM Fe,Midday 21.6866 21.6866 21.6866 12pM Fe,Midnight 21.605800000000002 20.913 22.2986 58pM Fe,Midday 19.1457 19.1457 19.1457 58pM Fe,Midnight 16.724342857142858 15.8253 17.5211 233pM Fe,Midnight 12.192466666666666 12.1087 12.2779 1160pM Fe,Midday 13.495114285714285 12.144 14.8071 1160pM Fe,Midnight 9.652715833333334 8.47981 11.4347 High carbon,Dark 11.80523 1.87483 19.2605 High carbon,Light 8.263535769230769 0.333823 14.9276 Low carbon,Dark 6.72762 6.72762 6.72762 Phloroglucinol 11.063553333333333 7.96832 16.622 Silicon starvation,12h 9.36642 9.36642 9.36642