one more question re. summry chemistry report

Q. Is it okay to use only one pH value (eg. measured in CaCl2) and one organic matter value (eg. oven dried) for each sample in our analyses?
A. Oven-dried value for soil organic matter is the correct value to use when reporting on soil organic matter. You were give the air-dry values so that you can determine the difference between the 2 set of values which would then allow you to comment on the hygroscopic water content.
As for 2 sets of soil pH values, you can use one of them, unless you want to discuss the difference between two sets of pH values (similar to last week's assignment).