condition mean min max 12pM Fe,Midday 38.2161 38.2161 38.2161 12pM Fe,Midnight 30.79555 28.9923 32.5988 58pM Fe,Midday 25.7927 25.7927 25.7927 58pM Fe,Midnight 25.84342857142857 21.5226 30.1227 233pM Fe,Midnight 17.7998 17.491 18.3116 1160pM Fe,Midday 22.30847142857143 18.9911 23.6101 1160pM Fe,Midnight 13.966875 11.5329 16.5941 High carbon,Dark 18.562073333333334 8.7918 29.3875 High carbon,Light 13.82977153846154 3.79129 28.1504 Low carbon,Dark 12.9432 12.9432 12.9432 Phloroglucinol 37.63263333333333 34.4606 43.2405 Silicon starvation,12h 26.5168 26.5168 26.5168