condition mean min max 12pM Fe,Midday 32.1882 32.1882 32.1882 12pM Fe,Midnight 37.7133 37.4939 37.9327 58pM Fe,Midday 25.2027 25.2027 25.2027 58pM Fe,Midnight 28.62515714285714 25.8295 30.8447 233pM Fe,Midnight 12.9011 12.1612 13.9823 1160pM Fe,Midday 17.31357142857143 12.6135 20.8807 1160pM Fe,Midnight 20.748541666666668 10.3314 27.3089 High carbon,Dark 37.721958666666666 6.10352 62.9574 High carbon,Light 22.872473846153845 3.3365 44.4903 Low carbon,Dark 26.0933 26.0933 26.0933 Phloroglucinol 9.983426666666666 8.05888 11.8312 Silicon starvation,12h 10.3353 10.3353 10.3353