LaMotte DCL-20 Colorimeter - Manual (Page 26)

POTASSIUM CONCENTRATION CHART
%T RANGE POUNDS PER ACRE
93-100% Very Low 0-44 lbs/acre
82-91% Low 50-76 lbs/acre
50-81% Medium 82-143 lbs/acre
18-80% High 144-281 lbs/acre
0-17% Very High Over 294 lbs/acre
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