God’s kingdom is that land. Why would we want to plant anywhere else? When it comes to the things that are eternal we have a choice to which land we farm.
So what is it that we have that we can sow into Gods fertile soil? We have our resources and our time. What we do with them is what our eternal rewards will be based on.
Why would we spend our precious time doing anything that doesn’t have eternal value? The Bible says all that will matter in the long run is whether what we do will withstand the test of fire when the earth is destroyed. Will your crops burn or will they survive the fire?