To begin over the past couple of decades Saudi Arabia's agriculture has vastly improved. Something that has helped this improvement is Saudi Arabia's smart use of the land. For example Saudi Arabia is thought of as mostly desert which is true, but it is how they use their desert which is so genius. They have and are still working on developing agricultural fields from the desert. They are able to do this by creating large irrigation projects and large mechanization to make that land cultivatable This is a great way to make the most of what they have.
If i was dropped down in Saudi Arabia and I needed to have a solid agriculture I would follow exactly what they are doing. In a country where most of the land is desert there is not much you can really do and their method of farming in the desert has proven to work. The only difference I would make is i would improve the number of agricultural fields in the deserts to create a better percent yield for my country. I would be spending more money to have these projects finished but making more from the product and make Saudi Arabia more sustainable as well. The picture below are some of the fields seen from an aerial view; as you can see they are just right in the middle of the desert and I would look to increase the number of fields.