condition mean min max 12pM Fe,Midday 47.8741 47.8741 47.8741 12pM Fe,Midnight 27.54025 27.0772 28.0033 58pM Fe,Midday 31.9567 31.9567 31.9567 58pM Fe,Midnight 14.9879 0.0 19.5889 233pM Fe,Midnight 18.3092 15.9534 21.2722 1160pM Fe,Midday 37.19197142857143 32.2629 43.4023 1160pM Fe,Midnight 12.7006975 5.43316 18.7619 High carbon,Dark 14.488434 3.75617 24.272 High carbon,Light 16.325217692307692 0.0 43.239 Low carbon,Dark 7.5064 7.5064 7.5064 Phloroglucinol 27.331833333333332 19.4731 42.3444 Silicon starvation,12h 36.0795 36.0795 36.0795