condition mean min max 12pM Fe,Midday 27.7935 27.7935 27.7935 12pM Fe,Midnight 14.8783 14.8046 14.952 58pM Fe,Midday 13.1963 13.1963 13.1963 58pM Fe,Midnight 10.18284 0.0 16.0867 233pM Fe,Midnight 7.348386666666666 6.72356 7.81014 1160pM Fe,Midday 10.59611 7.81565 13.0153 1160pM Fe,Midnight 5.7381883333333334 4.07955 6.82619 High carbon,Dark 14.335716 4.29765 30.6098 High carbon,Light 13.886113846153846 2.79359 25.6639 Low carbon,Dark 11.5663 11.5663 11.5663 Phloroglucinol 9.058053333333334 8.78581 9.46788 Silicon starvation,12h 31.6273 31.6273 31.6273