condition mean min max 12pM Fe,Midday 53.7213 53.7213 53.7213 12pM Fe,Midnight 47.60185 45.0917 50.112 58pM Fe,Midday 58.7707 58.7707 58.7707 58pM Fe,Midnight 45.7095 0.0 65.4014 233pM Fe,Midnight 46.3341 44.7352 47.6315 1160pM Fe,Midday 29.231157142857143 24.7661 32.2975 1160pM Fe,Midnight 31.694225 18.2537 50.7502 High carbon,Dark 49.49124 29.5618 76.0573 High carbon,Light 38.9253 12.7883 69.1477 Low carbon,Dark 32.2728 32.2728 32.2728 Phloroglucinol 34.6628 23.6717 47.4696 Silicon starvation,12h 40.5691 40.5691 40.5691