condition mean min max 12pM Fe,Midday 39.4017 39.4017 39.4017 12pM Fe,Midnight 38.31445 38.2368 38.3921 58pM Fe,Midday 31.7235 31.7235 31.7235 58pM Fe,Midnight 48.26802857142857 29.9598 126.187 233pM Fe,Midnight 31.35696666666667 29.893 32.7867 1160pM Fe,Midday 33.037171428571426 26.1255 37.5673 1160pM Fe,Midnight 17.18485 10.4484 23.4891 High carbon,Dark 29.88488 11.7764 52.4224 High carbon,Light 28.26026076923077 5.06986 58.0138 Low carbon,Dark 39.2233 39.2233 39.2233 Phloroglucinol 43.8162 32.2529 56.1072 Silicon starvation,12h 45.0387 45.0387 45.0387