Plant Nursery Fundamentals and Nursery Layout
This domain tests whether you can choose a nursery site and arrange its blocks so that propagation, growing, hardening and dispatch flow logically. Questions often ask for the reason behind a layout rule, not just the rule.
Site and block rules
- Choose level to gently sloping land (about 1–2% slope) with good drainage, full sun, reliable water and road access; avoid low frost pockets, waterlogged patches and old orchard land with soil-borne disease.
- Zone the nursery into a mother block, seed bed and seedling bed area, propagation/mist area, potting and polybag area, hardening area, display/sales area, store, compost pit, office and paths.
- Keep beds north–south for even light; make beds 1–1.2 m wide so workers can reach the centre from both sides; keep paths 60–75 cm wide; raise beds 15–20 cm.
- Arrange blocks in the order of work: mother block/seed → propagation → potting → hardening → dispatch. Put compost and manure downhill or away from clean propagation areas.
Worked example
For a 1 ha (10,000 m²) nursery, allocate 40% (4,000 m²) to production beds, 15% (1,500 m²) to the mother block, 10% (1,000 m²) to structures, 15% (1,500 m²) to paths, 5% (500 m²) to buildings/store, 5% (500 m²) to compost/utility and 10% (1,000 m²) to windbreak and drains. The percentages total 100%, and the area total is 10,000 m². The reasoning is that paths and service areas must be counted; a plan that gives all land to beds leaves no room to move plants.
Traps that cost marks
Treating layout as decoration; forgetting drainage; placing manure or compost above propagation beds; shading the entire nursery; making beds so wide that workers compact the media by stepping on it.
Key points
- Layout follows the work flow from propagation to dispatch.
- Beds 1–1.2 m wide with 60–75 cm paths.
- Site must have drainage, water and road access.
- Count paths, stores and windbreaks in the area budget.