Acid sulfate soils are usually overlain by soils that are not acid sulfate soils. Acid sulfate soil maps give an indication of the depth at which acid sulfate soils may be found. Where acid sulfate soils are at or near the soil surface, crops or vegetables are unlikely to grow due to waterlogging, acidity and nutrient issues. At higher elevations, however, there is often a layer of alluvium over the top which supports various landuses including dairying, grazing, and sugar cane.