Final answer:
Shallow prairie sites have upland soils of less than 20 inches in depth and slopes of less than 15 percent. They are not as suitable for agriculture compared to deeper prairie sites.
Step-by-step explanation:
The type of site described in the question, with upland soils of less than 20 inches in depth and slopes of less than 15 percent, is known as Shallow prairie. Shallow prairie sites have a limited depth of soil and relatively gentle slopes. This type of site is not as suitable for agriculture compared to deeper prairie sites.
Learn more about Shallow prairie sites with shallow soils and gentle slopes