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Hi, I'm working on leaf characteristics of trees. Each tree is characterised by about 10 leaf traits. The trees were sampled at 9 different locations (about 20 to 30 trees/location, NOT balanced), grouped in 3 different climatic zones (Sahelian, Soudanian and Guinean) (NOT balanced). Further, each tree is characterised by some degree of human pressure (mutilation degree), in total 4 different degrees were defined (NOT balanced). In the dryer zones, the trees are under a much higher human pressure than in the more humid climatic zones, "zone&qu...