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Natural Herbicide vs. Commercial Herbicide
Grade Level: 6th to 9th; Type: Biochemistry
Allelopathic substances work like herbicides, preventing the germination and growth of the seedlings of competing plant species. The research aspect of this science fair project is to compare the natural allelopathic chemical produced by the Black Walnut tree to that of a commercial herbicide in stopping the growth of a shrub.
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