Drip irrigation is much more efficient than sprinklers
You need an empty jug and a pointy thing
Step 1: Poke a small hole in the bottom of the jug
Step 2: Fill with water and set it next to a plant
Pay attention to what time it is (not really necessary)
Step 3: Come back in a while and see how much water is left
I got about a gallon per hour and a half.