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Social Studies, 27.08.2020 22:01, risolatziyovudd
Bob is curious to know which plant fertilizer, if any, will help his pepper plants to produce more peppers. He decides to test the 3 brands that the local nursery sells. He sets up four boxes and plants 3 sets of pepper plants in each box. he gives 30g of one type of each of the three fertilizers to the first three boxes, and adds no fertilizer at all to the fourth box. What is the control group in Bob's Experiment?
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