You may reference the articles handed out with this lab, using the format of a journal like Ecology . List a reference only if it is cited in the text of your report. Be sure to acknowledge the help of anyone who helped you. This could include your other members of the class or your instructor. Evaluation will be based on the care you take in calibration and validation and on the discussion of factors that appear to be important in regulating water relations.
Brevity is a virtue and verbiage a liability.
Only additional interpretation of the data justifies lengthening the write-up.