condition mean min max 12pM Fe,Midday 1.05659 1.05659 1.05659 12pM Fe,Midnight 1.093232 0.812954 1.37351 58pM Fe,Midday 0.467458 0.467458 0.467458 58pM Fe,Midnight 0.33257785714285715 0.0 0.891767 233pM Fe,Midnight 1.2064113333333333 0.334504 2.13853 1160pM Fe,Midday 0.06204871428571428 0.0 0.223027 1160pM Fe,Midnight 0.4968473333333333 0.0 1.42503 High carbon,Dark 2.4886401333333334 0.0 6.62003 High carbon,Light 1.9066576153846155 0.0 8.07834 Low carbon,Dark 0.0 0.0 0.0 Phloroglucinol 0.0 0.0 0.0 Silicon starvation,12h 0.150291 0.150291 0.150291