What are two assumptions made by Von Thunen that may not be ture in reality?

One assumption made by Von Thunen is that land is isotropic, meaning it is flat and uniform without any physical barriers, which is not the case in reality where terrain, climate, and other geographical features can impact agricultural practices. Another assumption is that farmers act purely in their economic self-interest, ignoring social, cultural, and ecological factors that can influence land use decisions and farming practices.