Step 1: Recall ratoon crop management.
Ratoon management in sugarcane involves practices after the harvest of the main crop to ensure good regrowth.
Step 2: Sequence of practices.
1. Emerged shoots are cut at ground level (A) → To remove unproductive shoots and encourage uniform tillering.
2. Sides of ridges are broken by plough (B) → This helps in aeration and better soil contact for new shoots.
3. First irrigation is given after 3–4 weeks (C) → Ensures proper sprouting and growth of ratoon crop.
4. Nutrients are given and earthing up done (D) → Supplies essential nutrients and stabilizes the crop.
Step 3: Conclusion.
Hence, the correct order is (A), (B), (C), (D).
Final Answer: \[ \boxed{\text{Correct sequence = (A), (B), (C), (D).}} \]