Any genius want the challenge of designing Do-It-Yourself hydrophilic irrigation for us clods?

The principle uses 2 separate spikes that are both connected to the same (single) water reservoir.

The spikes go into the soil a little bit apart from each other.

One spike prong must have air holes & the other an internal float valve that regulates water release.

As the soil dries out more air enters the respirator spike & alters the pressure inside the water reservoir.

With air entering the reservoir the float valve rises inside & unblocks the irrigation spike outlet.

When get saturation the soil aeration is reduced & pressure drops in the reservoir, which lets the float valve sink to shut off outflow.

A similar product's cross section view (item #35-122) can be seen at:

www.gardeners.com/Drip-it-Water/17519,default,pd.html