Siegfried Hofreiter owns 20.000 hectares of farmland making him Europe’s biggest farmer. Most of that land is in eastern Germany and Lithuania. Hofreiter does 28 million euros of business every year and his company is listed on the stock exchange. He's seeking to diversify into producing biogas but agriculture is a risky business even at the best of times when the world's population is growing and when prosperity in developing countries is driving up demand for food. Our reporter travelled to Lithuania to meet Hofreiter at his third farm.