Crikey, that's Australian dry. You definitely have more challenges in gardening than I do.
Yeah it can be a challenge. Once we hit ground crack any attempts to water just run into deep cracks or run off. The deep cracks can split tree roots killing the trees too.
Mixing in organics helps SOME but the fine particles of the clay rise to the top and the organics disappear.
It is CRAZY that this lot was a sugar beet field at one point.