The impact of dierent logging techniques on nutrient losses in burnt eucalyptus and pine forests in northern Portugal was investigated. A variety of logging techniques is used in the region resulting in varying amounts of slash debris on the slopes. The ecacy of this litter in reducing soil erosion is well established but less is known about the impact on nutrient losses. Small bounded plots were used to examine the impact of varying amounts of slash debris and pine-needle cover on nutrient losses in overland ยฏow and adsorbed to eroded sediment over 19 months during the ยฎrst twoยฑthree years after ยฎre. Nutrient losses in solution and adsorbed to eroded sediment were substantially higher on burnt terrain due to increased erosion and overland ยฏow generation and high nutrient concentrations at the soil surface in the burned forests. Post-ยฎre logging techniques in eucalyptus forests resulting in large amounts of litter debris on the slopes are eective at reducing eroded sediment nutrient losses but less eective at reducing losses in solution. In pine forests, litter is largely ineective in reducing solute and sediment nutrient losses. However, a covering of pine needles was shown to be highly eective in reducing eroded sediment nutrient losses and to a lesser extent solute losses. Conservational methods of logging are suggested for both eucalyptus and pine forests in the region. In the absence of such measures, the sustainability of short-rotation eucalyptus forestry is questioned in northern Portugal.