All Uruguay is mapped with soil types classified according to their productivity. Productivity is then measured by an index, known as the “CONEAT index”.
The average index for soils is 100. Thin soils on slopes will have low index, and would, perhaps, be better suited to forestry. Land given a Coneat grade of 80 to 120 is most often grassland, suitable for cattle. Coneat above 120 is usually suitable for intensive cultivation of most crops. Prime farmland for wheat might have an index of 150.
Of course, any one property may have a diversity of soils—generally poorer on uplands and slopes, and better on the lower-ground.