The location of soil can greatly affect the produce. In the mountains we have an area called timberline which is used to describe a natural dividing line that trees will not grow beyond. Timberline is about 11,500 feet in Colorado. Colorado has almost 100,000 mines and most of these mines have mine tailings. Mine tailings have absolutely zero organic matter.
Nothing can grow in tailings.
If you drive along Interstate I-70 from Denver to Glenwood Springs there are many examples of mine tailings that prohibit growth. Then there is also sandy wilderness soil that supports sagebrush and the occasional cedar tree. In our world there are places where the soil is so rich it can support dozens of cattle per acre. Then there are places in the world that require acres and acres to support just one calf. So the location of the soil, the altitude of the soil and many other external factors help determine what the soil will be able to produce.