Match the following nursery structures with their primary applications:
| Structure | Application |
| 1. Shade Net House | P. High-value crop production under controlled environment |
| 2. Polyhouse | Q. Protection from excessive sunlight and insect pests |
| 3. Mist Chamber | R. Rooting of cuttings and seed germination |
| 4. Hotbed | S. Early production of warm-season crops |
Which of the following combinations correctly matches the structure with its application?