Plant growth substances stimulate root growth from a cut stem. Describe an investigation to find the best concentration of plant growth substance to stimulate root growth.
You should include experimental details in your answer and write in full sentences.

silty loam

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the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

characteristics of hydrocarbons