Productivity on smallholder farms in Malawi is generally very low. Yields of the main subsistence crop, maize, are substantially below what could be achieved with improved crop management. Soil fertility is declining, so the productive capacity of farms is being eroded. Low incomes mean that few farmers can afford to purchase inorganic fertilizer, and the number of them benefitting from government input subsidies has fallen drastically. Individual land holdings are small and, in many areas, only one crop can be grown per year. Erratic rainfall—floods and dry spells—also has an impact on crop production. As a result, a large number of people do not produce enough food to meet their needs. So, too, do they lack diversity in their diets, which adversely affects the health of farm families. The incidence of stunting in children under 5 years of age averages 46 percent.