Trees and Shrubs: Use either pressure compensating or non pressure compensating drip emitters with 1/2" drip tubing or off 1/4" micro tubing attached to 1/2" drip line. Use soaker hose dripline to create drip rings around medium and large shrubs and small to large trees.
Flower Beds & Ground Cover: To cover small flower beds and ground cover, use 1/4" soaker hose dripline. For larger beds and ground covers, use micro sprayers and jets.
Vegetable Gardens & Berry Bushes: For small vegetable gardens and berry bushes, use 1/4" soaker hose dripline with 6" or 12" drip emitter spacing. For large vegetable gardens and berry bushes, use 1/2" soaker hose dripline with 12" to 36" emitter spacing. For gardens with uneven plant spacing, use 1/4" micro tubing with inline drip emitters or 1/2" solid drip tubing with self installed drip emitters.
Vineyards: Use 1/2" or 3/4" solid drip tubing attached to trellis. Install pressure compensating drip emitters in tubing facing down.
Slopes: When designing a drip system for slopes, it’s best to install drip tubing along the parallel of the slope and install .5 gph drip emitters. Lower flow emitters along with shorter but more frequent watering times will help prevent runoff and soil erosion.
Ref 2007