I wish lab's charts would use yellow for deficiency, green for sufficiency, pink for excess, and red for toxic.
However, this lab uses yellow to mean "slightly off." The effect is often to seem to invite application of more of that nutrient in any case, even though the test may actually be showing "slightly off into the excessive range." See most of your sample results for Iron in 2017.
Beware also of "anomalies": due to sampling errors, test malfunctions, typo's, etc. See the Calcium reading of the last sample for both years: dropped by 10,000.
Yeah, a lot of people would like to know how to do that!
Another example: a customer got off-the-chart Sulfur readings on all four mango and lychee leaf-tissue tests, even though the trees had not been sprayed with anything in years, and even though the soil test showed low Sulfur. Again, yeah right.
But, of course, most of the results are useful.