In effect, drip irrigation places small drip emitters in close proximity to the crops’ root systems. This provides a much-improved efficiency and makes the system much more controllable compared to other methods. The emitters release water in a slow and steady fashion. The emitters are very small, about the size of a US quarter and are arranged in an array in the ground. These emitters are directly connected to the water source by feeder hoses. Another setup is to have the emitters built into the feeder hose instead of rows of independent emitters. This is called a trickle hose.