condition mean min max 12pM Fe,Midday 0.0955163 0.0955163 0.0955163 12pM Fe,Midnight 3.45314 3.42962 3.47666 58pM Fe,Midday 0.169035 0.169035 0.169035 58pM Fe,Midnight 3.822412857142857 0.0 5.08965 233pM Fe,Midnight 4.077753333333334 3.56826 4.40186 1160pM Fe,Midday 0.0313489 0.0 0.0789741 1160pM Fe,Midnight 1.9258460583333332 0.0821167 5.60917 High carbon,Dark 2.850625866666667 0.574038 6.94446 High carbon,Light 0.656909 0.0 1.94744 Low carbon,Dark 1.70731 1.70731 1.70731 Phloroglucinol 2.95487 2.15471 3.44899 Silicon starvation,12h 0.163037 0.163037 0.163037