condition mean min max 12pM Fe,Midday 40.144 40.144 40.144 12pM Fe,Midnight 43.5115 43.4881 43.5349 58pM Fe,Midday 37.6847 37.6847 37.6847 58pM Fe,Midnight 38.8692 32.6478 58.7269 233pM Fe,Midnight 30.429633333333335 29.6507 31.9103 1160pM Fe,Midday 28.884257142857145 27.7188 30.1917 1160pM Fe,Midnight 23.509308333333333 21.6164 25.4639 High carbon,Dark 22.573507333333332 9.74021 35.0568 High carbon,Light 13.212528461538461 1.85394 18.697 Low carbon,Dark 16.1605 16.1605 16.1605 Phloroglucinol 16.2955 11.0145 25.5268 Silicon starvation,12h 16.9002 16.9002 16.9002