Commercial agriculture is made up of less than 40 000 farming units. Most if not all commercial farms are already farmed to capacity, and these farms generally seek to employ best practices, including the optimal utilisation of fertilisers, pesticides, crop rotation, grazing rotation and inoculations. By contrast, according to the Labour Force Survey, the number of black people practising agriculture at some scale increased from 3,5 million to 4,5 million, mostly within the former homelands. Most of these are subsistence or small-scale farmers, and farming methods are well below optimal.