By Emil Fulajtar and Joanne Liou*

VIENNA (IDN) – Harmless traces from nuclear testing more than half a century ago are helping researchers assess soil erosion rates. In Africa, about 65 percent of the continent’s farmland is affected by erosion-induced losses of topsoil and soil nutrients, according to the Food and Agriculture Organization of the United Nations (FAO). Benin is among those countries severely impacted by soil erosion, which poses a major problem for economic development since agriculture represents approximately 35 percent of the country’s GDP and 80 percent of its export income. A recent study applied a nuclear technique to assess rates of soil erosion and support land conservation in Benin.…