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If you are looking for a research paper, there is a frequently cited study regarding the in specific environments (often involving "sky" or light quality as a variable): Title: Seed germination in five coexisting Acacia species .
It uses earth pigments, acacia gum , zinc white, and wax. acacia skye
The work explores the medieval mystical concept of "greening" (viriditas) and uses shadows of branches traced during a residency in Sicily to create a "larger myth" around life force and the earth. 2. Scientific Paper on Acacia Species & Environment If you are looking for a research paper,