condition mean min max 12pM Fe,Midday 52.0713 52.0713 52.0713 12pM Fe,Midnight 38.3602 37.312 39.4084 58pM Fe,Midday 37.8683 37.8683 37.8683 58pM Fe,Midnight 26.34997142857143 0.0 33.7479 233pM Fe,Midnight 27.960833333333333 27.4739 28.2201 1160pM Fe,Midday 35.58634285714285 32.4725 37.7948 1160pM Fe,Midnight 14.418616666666667 11.2382 19.3285 High carbon,Dark 31.683453333333333 11.181 66.423 High carbon,Light 32.78426692307692 3.4101 64.3411 Low carbon,Dark 18.839 18.839 18.839 Phloroglucinol 17.9706 12.0803 23.6959 Silicon starvation,12h 29.4762 29.4762 29.4762