A few thoughts:
- Unfortunately, the CLARB/non-CLARB distinction for information is not always clear. There was a discussion on here where we determined that CLARB had provided incorrect information on ADA ramp standards (!!!) in their new online practice exam. And there is (as you've pointed out) contradictory information both between different CLARB recommended readings as well as within the books themselves.
- Generally speaking I think CLARB does a good job of using questions that address the consensus. So for your tree example, I expect that you could get a question that asks what the width of the planting hole should be, that the root flare should be above ground, etc. (Also it helps to cite where you are reading the discrepancies of wire basket removal if you really want feedback on that specific issue)
- In my opinion, planting details are often not intended to be read at scale in the same way that a hardscape detail would. So if you see a large gap between the bottom of the root ball and the subgrade but its not dimensioned, I would just ignore that/not worry about it. Planting has such a wide degree of tolerance because its workers digging holes in loose material, not a fabricator cutting steel to a tolerance of 1/64". So if its not dimensioned but it "looks" deeper, just don't worry about it
- Finally, all you're trying to do is pass the exam. You don't need to get every question right and regardless of how hard you study, you will encounter a handful of questions that you don't know how to answer. A lot of it comes down to how odd/confusing the wording is on these questions, that you received an experimental question, etc. I remember getting the same question twice on one my exams. One year people were complaining that there was no spacing between words in the exam so everythingappearedlikeasingleunbrokenword.The LARE is weird like that. So just take it easy. If you've put in the time to study the material and are starting to notice minutiae like the tree planting detail, it means you're likely more than prepared enough for exam day.