Scientists from the Joint Division of the UN’s Food and Agriculture Organization (FAO) and the International Energy Agency in (IAEA), in Vienna, Austria are helping farmers around the world to make the most of their water resources. Using nuclear techniques that show precisely how much water and fertilizers different plant varieties need, the experts are promoting a system called “drip irrigation”. This cost-effective technique can reduce water use by 50 percent, compared to other forms of irrigation. It needs less fertilizer, less manpower and also improves the quality of the plants. Louise Potterton has this report from the IAEA.