Outdoor & Protected Cultivation
Outdoor Root Zone, Drainage & Irrigation
Root-zone structure, water-holding capacity, drainage, oxygen, irrigation distribution, and rooting volume should be evaluated as one system.
Key concepts
- Texture and structure influence water retention and aeration
- Raised beds and containers change drainage and root temperature
- Irrigation should wet the intended root volume rather than only the stem base
- Mulch can reduce evaporation while also changing surface moisture and temperature
What to measure or observe
- Inspect soil texture and infiltration
- Observe how deeply irrigation wets the root zone
- Check moisture at several depths and distances from the stem
- Record runoff, ponding, and emitter uniformity
Common mistakes
- Watering by surface appearance alone
- Assuming more frequent irrigation always improves uptake
- Ignoring emitter clogging or uneven distribution
- Allowing mulch to hide persistent saturation
Visuals this lesson still needs
- Outdoor root-zone cutaway
- Emitter wetting-pattern diagram
- Drainage comparison
- Mulch water-balance diagram