Another inconsistency in the Bible. But wait! On day six God populated the Earth with men and women, bidding them "prosper and subdue the Earth" or something like that. The "garden" story, which is the second story of creation in the old Bibles, is given us as a first Sabbath event. So, is the Bible wrong or what?
The natural state and home of life as we know it on Earth is in the many corresponding spiritual kingdoms which coincide with the physical planet. All "primative peoples" know this but Christian traditions omit it. Why? Probably because it's not necessary to be aware of until good answers are ernestly sought. The story of A&E is only a metaphore for the earlier life lost resulting in man being banned to an Earthly existance. There was no sin however as this was the plan all along. "Salvation" is another metaphore for our earned right to return to our true home so long fortold. This land we know of as the "Kindom of God".
As for the soil, well, as with the story of the lion and the lamb, life forms in that "heaven" are in super light, refined bodies like the one the ressurected Jesus used which do not require sustainance in the same way that we do. The menu has only one item on it, the direct intake of energy.