Joe,

The key is getting a water plume to get to your roots zone. Either one will do the job, but your soil type is the most important to water moving through the soil. Is your soil more sandy or clayey? You will have to experiment with how long you have to water with drip. As plants age, their roots grow and more time is needed to irrigate them. There is no one regime fits all. JMHO Aloha.

Thanks for the reply lehua. It is clay that I tilled and mixed with peat moss and mushroom compost for each one. So, although amended, clay surrounds.