I just started in the business a few months ago and want to approach my business in an "above board" professional manner. I want to take the tests for fert and pest (herbicides) and am curious if there are any pros from CA that can direct me toward the best study materials? There is testing in July (I think that's too soon) and testing in September which I would like to get in on. If you would, please give me directions to the best, most concise materials. Thank you in advance for your help.