Abstract <p>The influence of soil pressure on the abrasive wear resistance and wear geometry of the working surfaces of cultural moldboards of plows used in the agricultural sector is examined. Experimental studies were conducted on moldboards coated with an epoxy–sand protective layer, operated in real field conditions on sandy loam soils. Wear was monitored by measuring the diameter of spherical pits applied to the protective coating, which allowed us to assess in detail the nature and rate of wear in different areas of the moldboard surface. It was found that wear occurs unevenly, and its intensity depends on the magnitude of the local soil pressure. At the initial stage of operation of the coating, accelerated abrasion is observed, then wear stabilizes, forming a stable mode. The protective layer exhibits adaptive properties, reaching an equilibrium state of the “coating–abrasive medium” tribosystem. Research results have practical significance for the design of materials and structures of moldboards with increased resistance to abrasive wear, as well as for the development of methods for their strengthening and restoration.</p>