condition mean min max 12pM Fe,Midday 20.7716 20.7716 20.7716 12pM Fe,Midnight 25.013849999999998 24.0966 25.9311 58pM Fe,Midday 15.0062 15.0062 15.0062 58pM Fe,Midnight 16.049757142857143 0.0 20.4709 233pM Fe,Midnight 10.038843333333334 9.69793 10.2664 1160pM Fe,Midday 13.903085714285714 11.716 15.5461 1160pM Fe,Midnight 6.422738333333333 5.64012 7.59404 High carbon,Dark 10.744238 1.3891 21.0162 High carbon,Light 5.872767153846154 0.670763 17.4635 Low carbon,Dark 9.54201 9.54201 9.54201 Phloroglucinol 4.86608 3.13044 6.50859 Silicon starvation,12h 5.21106 5.21106 5.21106