Use soaker hoses to protect your home base
If you are on a concrete slab-based home that sits on a heavy shrinking clay floor, it is probably advisable to dip the disc. The purpose of basic irrigation is to keep the water content of the soil under its foundation as evenly as possible. Since you can not keep the rain, it's your job to have the soils in the dry season reasonably wet. To be successful, an irrigation program must keep the soil moisture up to 4 or 5 feet deep. The more trees and shrubs the harder it is. Large plants can get plenty of water from the soil.
Soaker Hoses is one of the ways to keep moisture under your feet. The basic idea is to chime the house with them, connect them to faucets, and turn them on and slowly twist the water into the ground.
The problem that often arises is that if the piston hose length is too long there is not enough water pressure to reach the other end. Near the faucet, a lot of water was bubbling out, some in the middle, but none reached the end.
The problem is with regular garden hoses and pump hoses. In order to provide even irrigation and counterbalance the pressure drop in the crankshaft hoses, a separate water pipe (or regular hose) is injected into each section of the pump hose and connected to a T plug. Pump hoses extend to a maximum of 20 meters when connecting to water pipes
The typical home will have approximately 4 zones, each with its own water supply and control valve. With a few hundred bucks of hoses and connectors and a little work, homeowners can build their own systems. Hoses and parts are readily available on the hardware and in the home centers. These systems need not be sensitive. In fact, it is a good idea to bury them in a few centimeters of landscapes.
How often do water and how much? There is no simple answer and you have to use your judgment. The hotter and drier the water you need. The surface is damp, not a good indication of how your watering program works. It is possible for the surface to soak the soil while the soil depth is relatively dry.
One way to check if there is clay soil is to use a plumbing probe. The plumbing probe is a 4 or 5 foot fiberglass column with a "T" handle at the end. If the soils are too moist, then the pole may be pushed into the ground with little or no effort. When the soil is damp but not too moist, it should be able to push the probe 3 to 4 meters, with firm support to the handle. If you can not steal the test in the soil, the soils are probably too dry. This test will not work well on sandy or rocky ground. Do not use a metal pole to detect the ground. If you hit a buried tram line with a metal pole, bad things can happen