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Johannes wants to know whether soil, water, or both are needed for plant growth. He chooses to conduct experiments on a willow tree for five years to answer his question. How can his experimental methods
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Dec 12, 2018
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Johannes wants to know whether soil, water, or both are needed for plant growth. He chooses to conduct experiments on a willow tree for five years to answer his question. How can his experimental methods be changed to improve his experiment?
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if he tries it with more than one willow tree, different amounts of water, and or soil.
Inian
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Dec 17, 2018
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