condition mean min max 12pM Fe,Midday 33.2642 33.2642 33.2642 12pM Fe,Midnight 38.3741 34.5934 42.1548 58pM Fe,Midday 36.7921 36.7921 36.7921 58pM Fe,Midnight 37.6735 25.7321 86.9483 233pM Fe,Midnight 31.402133333333335 30.1599 32.1435 1160pM Fe,Midday 26.04522857142857 18.8495 30.6167 1160pM Fe,Midnight 22.328825 19.0388 26.8808 High carbon,Dark 35.627493333333334 13.2393 53.2855 High carbon,Light 27.57355923076923 6.91167 48.0196 Low carbon,Dark 27.8214 27.8214 27.8214 Phloroglucinol 50.02263333333333 39.5864 60.8233 Silicon starvation,12h 66.5203 66.5203 66.5203