Bhanjibhai Mathukia is a 70-year-old farmer from an obscure village in Gujarat's Junagadh district. He has no formal background in science yet his name figures in the list of nation's best innovators. Bhanjibhai's claim to fame is that he has developed a low cost check dam and a tractor. His habit of tinkering with machines led him to build his own tractor which is not only convertible but also designed in such a fashion that it can be converted into a three-wheeler. The tractor is particularly useful as it can perform most of the operations carried out by a regular tractor taking much less space. Bhanjibhai's other innovation is a check dam he built on the Dhrafad river that flows through his village. The total cost of his dam came to only about Rs 10,000,