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Do nematodes affect plant growth? A botanist prepares 16 identical planting pots and adds different numbers of nematodes into the pots. Seedling growth (in mm) is recorded two weeks later.

Nematodes and plant growth

One group contains no nematode at all. If the botanist planned this group as a baseline/control, then a contrast of all the nematode groups against the control would be valid.

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