How do I make my sandy soil fertility.

Hey so I live in the middle east west part of the negev and I’m trying to figure out a way how to make my soil more fertility so my soil is very sandy, like dune sand, and I have a relatively thick layer of very compacted chalky soil under the sand, and I have compost available but, it’s not really enough and we don’t have much rain and I also wanna make the chalky soil less compacted, any options?.