condition mean min max 12pM Fe,Midday 19.0203 19.0203 19.0203 12pM Fe,Midnight 18.7678 17.5048 20.0308 58pM Fe,Midday 17.7237 17.7237 17.7237 58pM Fe,Midnight 14.0659 0.0 18.7335 233pM Fe,Midnight 13.538866666666667 12.521 15.1997 1160pM Fe,Midday 14.008857142857142 11.6482 16.9438 1160pM Fe,Midnight 6.318795833333334 5.08364 7.6675 High carbon,Dark 13.730194666666666 6.66947 25.2336 High carbon,Light 11.388586923076923 4.75647 16.7697 Low carbon,Dark 13.6758 13.6758 13.6758 Phloroglucinol 16.379733333333334 12.3405 19.3677 Silicon starvation,12h 36.4883 36.4883 36.4883