1. Do not use a catalyst rooting 2. Start B1 3. 1-naphthylacetic acid (NAA) (concentration 3,000, 3,500 and 4,000 ppm, respectively), and 4. indole-3-butyric acid (IBA) (concentrations. 3,000, 3,500 and 4,000 ppm, respectively).
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