condition mean min max 12pM Fe,Midday 30.2619 30.2619 30.2619 12pM Fe,Midnight 32.2151 29.5042 34.926 58pM Fe,Midday 31.7978 31.7978 31.7978 58pM Fe,Midnight 28.82682857142857 0.0 37.2763 233pM Fe,Midnight 31.614533333333334 22.8628 43.7115 1160pM Fe,Midday 40.059757142857144 31.9779 47.1099 1160pM Fe,Midnight 35.5923 17.1405 54.9392 High carbon,Dark 36.49738 14.8612 55.8638 High carbon,Light 32.55481538461539 5.56737 56.495 Low carbon,Dark 24.5872 24.5872 24.5872 Phloroglucinol 74.913 66.9626 89.4811 Silicon starvation,12h 38.7407 38.7407 38.7407