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to elliminate soures of error
to elliminate soures of error
to elliminate soures of error
to have something to compare with the growth of fertilized plants.
Why must controls (such as plants given water only) be used in the fertilizer experiment
to have something to compare with the growth of fertilized plants
to have something to compare with the growth of fertilized plants. (; britnee Morgan
to have something to compare with the growth of fertilized plants. (; britnee Morgan
to elliminate soures of error
to elliminate soures of error
controlled variable would be light water and health of the plants
to have something to compare with the growth of fertilized plants. (; britnee Morgan