I'm going to try this for irrigating my raised beds, simple pvc customized per crop with shut off valves.
What you need for an automated irrigation system in raised-bed vegetable gardens (and the cost) by AFiskie
Sub-irrigated garden boxes. a great system that addresses common problems with raised beds (watch the video!
Raised Bed Gardening for Beginners: 10 Steps to Building Your Own Raised Garden Beds homeandgardenamer. - The Practical Gardener
No irrigation raised bed gardening system (Hugelkultur) - Gardening DIY
Drip irrigation on water trough raised beds // Gardenista
Build A Self-Watering Salad Table — Instructables Another Salad Table but this one is self watering. This may be the one for me?