condition mean min max 12pM Fe,Midday 0.50232 0.50232 0.50232 12pM Fe,Midnight 0.4526755 0.261196 0.644155 58pM Fe,Midday 0.444476 0.444476 0.444476 58pM Fe,Midnight 0.2633438285714286 0.0 0.621802 233pM Fe,Midnight 0.13085633333333332 0.0 0.23354 1160pM Fe,Midday 0.22464412857142857 0.0964779 0.311494 1160pM Fe,Midnight 0.4847825 0.0 1.0908 High carbon,Dark 1.9368257333333332 0.219273 4.77687 High carbon,Light 1.6165972307692307 0.0 4.10478 Low carbon,Dark 0.816251 0.816251 0.816251 Phloroglucinol 3.1405113333333334 0.157383 8.47021 Silicon starvation,12h 0.357255 0.357255 0.357255